CN108666540A - A kind of carbon coating curing nickel material and preparation method thereof and as anode material of lithium-ion battery application - Google Patents
A kind of carbon coating curing nickel material and preparation method thereof and as anode material of lithium-ion battery application Download PDFInfo
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Abstract
The invention discloses a kind of carbon coating NiS2Material and preparation method thereof and application as anode material of lithium-ion battery.Carbon coating NiS2The preparation process of material is that dimethylglyoxime synthesizes Ni (DMG) with nickel salt by complexation reaction2Club shaped structure；At Ni (DMG)2Club shaped structure surface coats polyaniline by in-situ polymerization, obtains Ni (DMG)2Club shaped structure@Polyanilines；Ni(DMG)2It after club shaped structure@Polyanilines are mixed with elemental sulfur, is placed under protective atmosphere, carries out calcination processing to get carbon coating NiS2Material, the material are used as anode material of lithium-ion battery, excellent chemical property are shown, in 0.1A g‑1Current density under charge and discharge cycles 100 enclose after still have 581mAh g‑1Capacity.And this carbon coating NiS2The preparation method of material is simple, and condition is controllable, with short production cycle, at low cost, is conducive to industrialized production.
Description
Technical field
The present invention relates to a kind of carbon-coated NiS2The Ni (DMG) that material, more particularly to diacetyl and nickel are formed2Rodlike knot
Structure forms carbon coating NiS by in-stiu coating polyaniline and vulcanization and carbonization2Material more particularly to carbon coating NiS2Material is made
For the application of anode material of lithium-ion battery, belong to sodium-ion battery technical field.
Background technology
Energy and environmental problem is world today's problem of greatest concern.In in the past few decades, lithium ion battery because
The advantages such as its energy density is high, have extended cycle life, environmental pollution is small are widely applied.However, storage of the lithium in the earth's crust
It measures relatively low, the demand of the power battery risen in recent years and scale energy storage field is necessarily cannot be satisfied, in this way, seeking new energy storage
System seems particularly important.
Sodium-ion battery system is due to resourceful, cheap, environmental-friendly and close with lithium ion battery
Chemical property, by the extensive concern of researcher.In recent years, largely storage sodium mechanism and corresponding material were studied and carried
Go out, for example, embedded type TiO2, graphite, the Fe of transformant2O3And alloy type Sb, P etc..However there is storage sodium in these materials
The corresponding problems such as the low, poor circulation of capacity.In order to further increase energy density and storage sodium performance, need to develop and use tool
The electrode material of standby high power capacity.
Transient metal sulfide (TMS) is since its high theoretical specific capacity is by extensive concern, such as MoS2、CoS、VS2、NiS2
Deng.The 2D materials MoS of document report2Capacity can after 100 cycle charge-discharges under the current density of 1000mA/g
To reach 484mAh/g (Zhu C, Mu X, van Aken P A, etal.Angew.Chem.Int.Ed.2014,53:2152-
2156).The ball-type FeS of Zhe Hu et al. reports2Pass through 20000 times under the current density of 1A/g as sodium ion negative material
Cycle after can still can reach 200mAh/g (Hu Z, Zhu Z, Cheng F, et al. [J] .Energy＆
Environmental Science,2015,8(4):1309-1316.).The sodium ion of Zulipiya Shadike et al. reports
Negative material CoS2Pass through after 100 cycle charge-discharges still under the current density of 100mA/g with carbon nano tube compound material
Specific capacity (Shadike Z, Cao M H, Ding F, et al. [J] .Chemical of 631mAh/g can so be reached
Communications,2015,51(52):10486-10489.).However, these transient metal sulfides (TMS) are in sodium ion
It will produce Study of Volume Expansion in battery charge and discharge process, cause its cyclical stability to decline, limit it in sodium-ion battery
In application.Relatively other metal sulfide materials, curing nickel have higher theoretical specific capacity, become scientific worker and grind
The important object studied carefully, volume is swollen during curing nickel equally exists charge and discharge process during as sodium-ion battery materials'use
Swollen problem, while electric conductivity and storage sodium energy force difference use some and improve hand in the prior art in order to solve the technical problem
Section, is such as made various three-dimensional porous structures by transient metal sulfide, passes through as Chinese patent (CN107344732A) discloses
Hydrothermal synthesis-etching-annealing three step process method obtains three-dimensional porous NiS2Microballoon, when the negative material as sodium-ion battery
When, which shows preferable reversible capacity and cyclical stability.Chinese patent (CN 107140699A) is open
By the method for high-temperature solvent heat, NiS is successfully synthesized2Meso-porous nano ball material, as sodium-ion battery negative electrode active material
When material, excellent high rate capability, cyclical stability and long-life are shown.As Chinese patent 105883940A is disclosed with 2-
After methylimidazole alcohol nickel complex and sulphur powder are by ground and mixed, it is placed in vacuum environment, is heat-treated to get by high-purity
NiS2The blocky NiS that the spherical little particle of nanometer is constituted2Material, the material are applied to sodium-ion battery as negative material, show
Specific capacity is high and the excellent chemical property such as have extended cycle life.Although these existing methods can be alleviated to a certain extent
NiS2Volume expansion in charge and discharge process, but its cyclical stability and electric conductivity, storage sodium ability is still relatively poor, needs to be carried
It is high.
Invention content
For existing transient metal sulfide (TMS) as sodium-ion battery in use, in sodium-ion battery charge and discharge
The problems such as will produce volume expansion and structure collapses in the process, the first object of the present invention are to be that providing one kind having outer layer carbon
The NiS of layer cladding2Material, storage sodium performance is good, and electric conductivity is high, and can solve the problems, such as volume expansion during storage sodium very well.
Second object of the present invention is to be to provide a kind of simple, low cost to prepare the carbon coating NiS2Material
Method.
Third object of the present invention is to be to provide a kind of carbon coating NiS2Application of the material in sodium-ion battery, will
It shows excellent cyclical stability as sodium ion negative material application.
In order to achieve the above technical purposes, the present invention provides a kind of carbon coating NiS2The preparation method of material comprising
Following steps：
1) dimethylglyoxime synthesizes Ni (DMG) with nickel salt by complexation reaction2Club shaped structure；
2) at Ni (DMG)2Club shaped structure surface coats polyaniline by in-situ polymerization, obtains Ni (DMG)2Club shaped structure@is poly-
Aniline compound；
3)Ni(DMG)2After club shaped structure@Polyanilines are mixed with elemental sulfur, it is placed under protective atmosphere, is calcined
Processing to get.
Dimethylglyoxime alcoholic solution is added dropwise in nickel salt aqueous solution by preferred scheme, maintain solution system pH be 7.5~
9, temperature is stirred to react within the scope of 0~10 DEG C, obtains Ni (DMG)2Club shaped structure.Obtain the Ni (DMG) of appropriate size2It is rodlike
Structure most critical is the control of pH and temperature, and pH value is further up, can lead to Ni (DMG)2The diameter and length of club shaped structure
Can it increase, and temperature further increases, then Ni (DMG)2The diameter of club shaped structure is obviously thicker, and length increases.Therefore pass through
It is 7.5~9 to control pH, and temperature can obtain the suitable Ni of size (DMG) in 0~10 DEG C of range2Club shaped structure, as the present invention obtains
Obtain the club shaped structure with micron-scale.
More preferably scheme, nickel salt generally use water soluble nickel salt, such as NiCl2·6H2O is centainly typically to can be used for
Prepare Ni (DMG)2The material of club shaped structure.Dimethylglyoxime is 2 with nickel salt mass ratio:1, ratio generally requires dimethylglyoxime appropriate
It is excessive.
Preferred scheme, the in-situ polymerization process are：By Ni (DMG)2Club shaped structure is dispersed to containing aniline and tartaric acid
Solution in, be added initiator initiated polymerization, obtain Ni (DMG)2Club shaped structure@Polyanilines.By in situ poly-
Conjunction can be at Ni (DMG)2The polyaniline film that club shaped structure surface is evenly coated.It can be obviously improved benzene by adding tartaric acid
The degree of polymerization and microstructure of amine are relatively free of polyaniline conductivity prepared by addition tartaric acid and significantly improve.
More preferably scheme, aniline and Ni (DMG)2The mass ratio of club shaped structure is 0.5:1~5:1.The dosage of aniline is determined
The thickness for having determined polyaniline-coated layer can obtain the suitable Ni of polyaniline-coated layer thickness in currently preferred range
(DMG)2Club shaped structure.
The mass ratio of more preferably scheme, tartaric acid and aniline is 0.5:1~2:1.
More preferably scheme, the polymerisation are carried out in the environment of ice domain, and polymerization reaction time is 3~12h.
Preferred scheme, the persulfate that polymerization process uses as initiator, generally using a concentration of 0.05~
0.5mol L-1Ammonium persulfate solution.The amount of initiator is adjusted according to actual conditions, this is that those skilled in the art are easy to implement
's.
Preferred scheme, Ni (DMG)2Club shaped structure is added in the solution containing aniline and tartaric acid, in the environment of ice domain
It is sufficiently stirred dispersion, mixing time is 30~60min.
Preferred scheme, Ni (DMG)2The mass ratio of club shaped structure@Polyanilines and elemental sulfur is 1:2~1:5.It is single
Matter sulphur is suitably excessively conducive to the abundant conversion of nickel.
Preferred scheme, Ni (DMG)2Club shaped structure@Polyanilines pass through ground and mixed with elemental sulfur.In order to reach
The time of preferable grinding effect, ground and mixed is 10~60min.
Preferred scheme, with 3~7 DEG C of min-1Heating rate is warming up to 250~350 DEG C of 0.5~1.5h of calcining, then with 1~3
℃min-1Heating rate is warming up to 450~550 DEG C of 1~3h of calcining.More preferably scheme, with 5 DEG C of min-1Heating rate is warming up to
300 DEG C of calcining 1h, then with 2 DEG C of min-1Heating rate is warming up to 500 DEG C of calcining 2h.The present invention first at a temperature of 300 DEG C or so into
Row heat preservation, mainly increases vulcanization time, avoids elemental sulfur because high temperature distils, because elemental sulfur is in boiling point (boiling temperature 444
DEG C) easily distil under temperatures above, at 500 DEG C, heat preservation is on the one hand in order to which depth vulcanizes, while extra sulphur being distilled volatilization, keeps away
Exempt from finally obtained material and contain elemental sulfur, is on the other hand so that polyaniline carbonization is generated carbon coating layer, while having portion to be carbonized
Divide sulfur doping in carbon coating layer.
Preferred scheme, protective atmosphere of the invention are nitrogen, inert gas etc., generally use cheap nitrogen.
The carbon coating NiS of the present invention2Material is in preparation process, Ni (DMG)2Club shaped structure, Ni (DMG)2Club shaped structure@
The separation of the products such as Polyaniline generally by it is conventional be separated by filtration, washing and drying treatment.Dry is vacuum drying.
Cleaning process uses deionized water.
The present invention prepares carbon coating NiS2Preferred method：Dimethylglyoxime is dissolved in 200mL ethyl alcohol and is denoted as solution A,
NiCl2·6H2O, which is dissolved in 50mL deionized waters, is denoted as easy B, and A is added drop-wise to dropwise in B and continues to stir 5min, is washed,
Rodlike Ni (DMG) is obtained after drying2.By the polymerization of aniline to rodlike Ni (DMG)2It is coated, obtains polyaniline-coated
Ni (DMG) afterwards2, then product is mixed with sulphur powder, mixed system is in N2Under protection, with 5 DEG C of min-1Rate be warming up to 300
DEG C calcining 1h, then with 2 DEG C of min-1Rate be warming up to 500 DEG C calcining 2h to get carbon coating NiS2Material.Wherein, aniline and Ni
(DMG)2Mass ratio be 1:1, the Ni (DMG) after polyaniline-coated2Mass ratio with sublimed sulfur is 1:2.
The present invention also provides a kind of carbon coating NiS2Material is obtained by above-mentioned preparation method.
The present invention also provides a kind of carbon coating NiS2The application of material is used as anode material of lithium-ion battery application.
Using dimethylglyoxime as ligand, metal ion centered on nickel ion, the two passes through technical scheme of the present invention
Complexation reaction generates the Ni (DMG) with special three dimensions2Club shaped structure, and by adjusting the state modulators such as pH and temperature
Club shaped structure has micron order size, Ni (DMG) as shown in Figure 12The length of club shaped structure is generally several microns.Ni is used again
(DMG)2Club shaped structure coats one layer of uniform electrically conductive polyaniline clad as template, on its surface, leads in the course of the polymerization process
Addition tartaric acid is crossed, polyaniline structure and pattern can be significantly improved, hence it is evident that improves the electric conductivity of polyaniline.Further by Ni
(DMG)2Club shaped structure Polyaniline carries out high temperature vulcanized and carbonization, vulcanization and carbon together with elemental sulfur after ground and mixed
The carbon coating NiS generated after change2Substantially Ni (DMG) is maintained2Club shaped structure, and in NiS2Club shaped structure surface coats one layer
Conductive carbon layer, one side conductive carbon layer can be obviously improved the electric conductivity of curing nickel, improve it and store up sodium performance, on the other hand
Conductive carbon layer provides buffer layer for volume expansion of the curing nickel in charge and discharge process, and vulcanizes and carbonisation middle part
Divide sulfur doping to form C-S-C keys in carbon coating layer, so that conductive carbon layer structure is more stablized, effectively avoided in cyclic process
Volume expansion and the problem of bring.
Compared with the prior art, the advantageous effects that technical scheme of the present invention is brought：
The carbon coating NiS that technical scheme of the present invention provides2Material has micron order club shaped structure, and pattern is uniform, and
NiS2One layer of uniform conductive carbon layer of club shaped structure Surface Creation, is not only able to be obviously improved the electric conductivity of curing nickel,
It improves it and stores up sodium performance, and conductive carbon layer provides buffer layer for volume expansion of the curing nickel in charge and discharge process.
The carbon coating NiS that technical scheme of the present invention provides2Material is doped with sulphur in carbon coating layer, forms C-S-C keys,
So that conductive carbon layer structure is more stablized, volume expansion is effectively avoided the problem that in cyclic process and is brought.
The carbon coating NiS that technical scheme of the present invention provides2Material preparation method is simple, relatively existing hydrothermal synthesis side
Method reaction condition is milder, at low cost, is conducive to amplify metaplasia production.
The carbon coating NiS that technical scheme of the present invention provides2Material is used for the negative material of sodium-ion battery, shows excellent
Different chemical property, such as good cycle.
Description of the drawings
【Fig. 1】It is the rodlike Ni (DMG) obtained in embodiment 12Scanning figure；
【Fig. 2】It is carbon coating NiS2XPS；
【Fig. 3】It is that carbon coating NiS is obtained in embodiment 12XRD diagram；
【Fig. 4】It is the carbon/NiS obtained in control experiment2The carbon coating NiS obtained in composite material and embodiment 12Fill
Discharge cycles figure.
Specific implementation mode
Following embodiment is in order to which the present invention is explained in greater detail, these embodiments do not form any restrictions to the present invention,
The present invention can be implemented by the either type described in invention content.
Electrochemical property test：In order to study the storage sodium chemical property of prepared material, in inert atmosphere glove box
In assemble CR2016 type button cells.By active material, sodium carboxymethylcellulose binding agent (CMC), Super P conductive agents according to
Mass ratio 70:15:15 are uniformly mixed, and are added in appropriate amount of deionized water and are modulated into slurry, are applied on copper foil, are waited for after allowing
Ionized water volatilization is placed in vacuum drying chamber, dry 12h at 60 DEG C.The copper foil for being coated with active material after drying is cut into directly
The disk of diameter 13mm is used as button cell working electrode after the pressure pushing of 10MPa, and metallic sodium is used as comparison electrode, Celgard
2400 films are used as diaphragm.Sodium perchlorate is dissolved in mixed liquor (the two volume of methyl acrylate and fluorinated ethylene carbonate (FEC)
Than being 95:5) it is prepared in.Using the charge-discharge performance of constant current charge-discharge Testing Technology Study material, charging/discharging voltage window
Mouth is 3.00-0.01V (vs.Na+/Na)。
Control experiment
Ni(DMG)2Preparation：2.00g dimethylglyoximes are dissolved in 200mL ethyl alcohol and remember solution A, 2.04g NiCl2·6H2O
It is dissolved in 50mL deionized waters and remembers solution B, it is 8.5 to adjust pH value.Under magnetic stirring, A is added drop-wise in B dropwise, is dripped
Continue to stir 5min after finishing, whole process temperature is controlled at 5 DEG C or less.Obtained product is washed into number with deionized water and ethyl alcohol
After secondary, 80 DEG C of vacuum drying 12h obtain red Ni (DMG)2。
NiS2：By the rodlike Ni of 0.2g (DMG)2It is mixed in mortar with 0.4g sublimed sulfurs and grinds 20min and be placed on magnetic boat
In, in N2Under protective condition, with 5 DEG C of min-1Rate be warming up to 300 DEG C of calcining 1h, then with 2 DEG C of min-1Rate be warming up to 500
DEG C calcining 2h, obtain carbon/NiS2Composite material.The composite material is not carbon encapsulated material, but the mixing of carbon and curing nickel
Material divides club shaped structure to be destroyed.Carbon/NiS in control experiment2Composite material is used as electrode material, in 0.1A g-1Electric current
There is 86.8mAh g after charge and discharge cycles 100 are enclosed under density-1Capacity.
Embodiment 1
Ni(DMG)2Preparation：2.00g dimethylglyoximes are dissolved in 200mL ethyl alcohol and remember solution A, 2.04g NiCl2·6H2O
It is dissolved in 50mL deionized waters and remembers solution B, it is 8.5 to adjust pH value.Under magnetic stirring, A is added drop-wise in B dropwise, is dripped
Continue to stir 5min after finishing, whole process temperature is controlled at 5 DEG C or less.Obtained product is washed into number with deionized water and ethyl alcohol
After secondary, 80 DEG C of vacuum drying 12h obtain red Ni (DMG)2。
Carbon coating NiS2Preparation：0.9313g aniline and 0.75g tartaric acid are dissolved in 150mL deionized waters, are added
0.9g Ni(DMG)2, after stirring 30min under condition of ice bath, the 50mL 0.2mol/L ammonium persulfates being preset in ice bath are added
Solution persistently stirs 6h under condition of ice bath, and obtained product deionized water and ethyl alcohol are washed for several times, 80 DEG C of vacuum drying
The Ni (DMG) of polyaniline-coated is obtained after 12h2.Finally by the Ni (DMG) of 0.2g polyaniline-coateds2With 0.4g sublimed sulfurs in mortar
Middle mixing is simultaneously ground 20min and is placed in magnetic boat, in N2Under protective condition, with 5 DEG C of min-1Rate be warming up to 300 DEG C of calcinings
1h, then with 2 DEG C of min-1Rate be warming up to 500 DEG C calcining 2h, obtain carbon-coated NiS2.Carbon coating NiS in example 12With
Make electrode material, in 0.1A g-1Current density under charge and discharge cycles 100 enclose after still have 581mAh g-1Capacity, electric current is close
Spend 0.05,0.1,0.2,0.4,0.8 and 1.6A g-1Under capacity be respectively 694,671,670,631,555 and 448mAh g-1。
From the swarming figure of the C1s in XPS, there is a peak in the position of 283.9eV, correspond to C-S-C keys, be in high temperature vulcanized process
In, sulphur and polyaniline, which interact, to be formed.
Embodiment 2
Ni(DMG)2Preparation：2.00g dimethylglyoximes are dissolved in 200mL ethyl alcohol and remember solution A, 2.04g NiCl2·6H2O
It is dissolved in 50mL deionized waters and remembers solution B, it is 9.0 to adjust pH value.Under magnetic stirring, A is added drop-wise in B dropwise, is dripped
Continue to stir 5min after finishing, whole process temperature is controlled at 5 DEG C or less.Obtained product is washed into number with deionized water and ethyl alcohol
After secondary, 80 DEG C of vacuum drying 12h obtain red Ni (DMG)2。
Carbon coating NiS2Preparation：0.9313g aniline and 0.75g tartaric acid are dissolved in 150mL deionized waters, are added
0.9g Ni(DMG)2, after stirring 30min under condition of ice bath, the 50mL 0.2mol/L ammonium persulfates being preset in ice bath are added
Solution persistently stirs 6h under condition of ice bath, and obtained product deionized water and ethyl alcohol are washed for several times, 80 DEG C of vacuum drying
The Ni (DMG) of polyaniline-coated is obtained after 12h2.Finally by the Ni (DMG) of 0.2g polyaniline-coateds2With 0.4g sublimed sulfurs in mortar
Middle mixing is simultaneously ground 20min and is placed in magnetic boat, in N2Under protective condition, with 5 DEG C of min-1Rate be warming up to 300 DEG C of calcinings
1h, then with 2 DEG C of min-1Rate be warming up to 500 DEG C calcining 2h, obtain carbon-coated NiS2.Carbon coating NiS in example 22With
Make electrode material, in 0.1A g-1Current density under charge and discharge cycles 100 enclose after have 531mAh g-1Capacity.
Embodiment 3
Ni(DMG)2Preparation：2.00g dimethylglyoximes are dissolved in 200mL ethyl alcohol and remember solution A, 2.04g NiCl2·6H2O
It is dissolved in 50mL deionized waters and remembers solution B, it is 8.5 to adjust pH value.Under magnetic stirring, A is added drop-wise in B dropwise, is dripped
Continue to stir 5min after finishing, whole process temperature is controlled at 10 DEG C or less.Obtained product is washed with deionized water and ethyl alcohol
After for several times, 80 DEG C of vacuum drying 12h obtain red Ni (DMG)2。
Carbon coating NiS2Preparation：0.9313g aniline and 0.75g tartaric acid are dissolved in 150mL deionized waters, are added
0.9g Ni(DMG)2, after stirring 30min under condition of ice bath, the 50mL 0.2mol/L ammonium persulfates being preset in ice bath are added
Solution persistently stirs 6h under condition of ice bath, and obtained product deionized water and ethyl alcohol are washed for several times, 80 DEG C of vacuum drying
The Ni (DMG) of polyaniline-coated is obtained after 12h2.Finally by the Ni (DMG) of 0.2g polyaniline-coateds2With 0.4g sublimed sulfurs in mortar
Middle mixing is simultaneously ground 20min and is placed in magnetic boat, in N2Under protective condition, with 5 DEG C of min-1Rate be warming up to 300 DEG C of calcinings
1h, then with 2 DEG C of min-1Rate be warming up to 500 DEG C calcining 2h, obtain carbon-coated NiS2.Carbon coating NiS in example 32With
Make electrode material, in 0.1A g-1Current density under charge and discharge cycles 100 enclose after have 498mAh g-1Capacity.
Embodiment 4
Ni(DMG)2Preparation：2.00g dimethylglyoximes are dissolved in 200mL ethyl alcohol and remember solution A, 2.04g NiCl2·6H2O
It is dissolved in 50mL deionized waters and remembers solution B, it is 8.5 to adjust pH value.Under magnetic stirring, A is added drop-wise in B dropwise, is dripped
Continue to stir 5min after finishing, whole process temperature is controlled at 5 DEG C or less.Obtained product is washed into number with deionized water and ethyl alcohol
After secondary, 80 DEG C of vacuum drying 12h obtain red Ni (DMG)2。
Carbon coating NiS2Preparation：1.8626g aniline and 1.5g tartaric acid are dissolved in 150mL deionized waters, are added
0.9g Ni(DMG)2, after stirring 30min under condition of ice bath, the 50mL 0.4mol/L ammonium persulfates being preset in ice bath are added
Solution persistently stirs 6h under condition of ice bath, and obtained product deionized water and ethyl alcohol are washed for several times, 80 DEG C of vacuum drying
Ni (the DM of polyaniline-coated are obtained after 12hG)2.Finally by the Ni (DMG) of 0.2g polyaniline-coateds2With 0.4g sublimed sulfurs in mortar
Middle mixing is simultaneously ground 20min and is placed in magnetic boat, in N2Under protective condition, with 5 DEG C of min-1Rate be warming up to 300 DEG C of calcinings
1h, then with 2 DEG C of min-1Rate be warming up to 500 DEG C calcining 2h, obtain carbon-coated NiS2.Carbon coating NiS in example 42With
Make electrode material, in 0.1A g-1Current density under charge and discharge cycles 100 enclose after have 536mAh g-1Capacity.
Embodiment 5
Ni(DMG)2Preparation：2.00g dimethylglyoximes are dissolved in 200mL ethyl alcohol and remember solution A, 2.04g NiCl2·6H2O
It is dissolved in 50mL deionized waters and remembers solution B, it is 8.5 to adjust pH value.Under magnetic stirring, A is added drop-wise in B dropwise, is dripped
Continue to stir 5min after finishing, whole process temperature is controlled at 5 DEG C or less.Obtained product is washed into number with deionized water and ethyl alcohol
After secondary, 80 DEG C of vacuum drying 12h obtain red Ni (DMG)2。
Carbon coating NiS2Preparation：0.4656g aniline and 0.375g tartaric acid are dissolved in 150mL deionized waters, are added
0.9g Ni(DMG)2, after stirring 30min under condition of ice bath, the 50mL 0.1mol/L ammonium persulfates being preset in ice bath are added
Solution persistently stirs 6h under condition of ice bath, and obtained product deionized water and ethyl alcohol are washed for several times, 80 DEG C of vacuum drying
The Ni (DMG) of polyaniline-coated is obtained after 12h2.Finally by the Ni (DMG) of 0.2g polyaniline-coateds2With 0.4g sublimed sulfurs in mortar
Middle mixing is simultaneously ground 20min and is placed in magnetic boat, in N2Under protective condition, with 5 DEG C of min-1Rate be warming up to 300 DEG C of calcinings
1h, then with 2 DEG C of min-1Rate be warming up to 500 DEG C calcining 2h, obtain carbon-coated NiS2.Carbon coating NiS in example 52With
Make electrode material, in 0.1A g-1Current density under charge and discharge cycles 100 enclose after have 298mAh g-1Capacity.
Embodiment 6
Ni(DMG)2Preparation：2.00g dimethylglyoximes are dissolved in 200mL ethyl alcohol and remember solution A, 2.04g NiCl2·6H2O
It is dissolved in 50mL deionized waters and remembers solution B, it is 8.5 to adjust pH value.Under magnetic stirring, A is added drop-wise in B dropwise, is dripped
Continue to stir 5min after finishing, whole process temperature is controlled at 5 DEG C or less.Obtained product is washed into number with deionized water and ethyl alcohol
After secondary, 80 DEG C of vacuum drying 12h obtain red Ni (DMG)2。
Carbon coating NiS2Preparation：0.9313g aniline and 0.75g tartaric acid are dissolved in 150mL deionized waters, are added
0.9g Ni(DMG)2, after stirring 20min under condition of ice bath, the 50mL 0.2mol/L ammonium persulfates being preset in ice bath are added
Solution persistently stirs 6h under condition of ice bath, and obtained product deionized water and ethyl alcohol are washed for several times, 80 DEG C of vacuum drying
The Ni (DMG) of polyaniline-coated is obtained after 12h2.Finally by the Ni (DMG) of 0.2g polyaniline-coateds2With 0.4g sublimed sulfurs in mortar
Middle mixing is simultaneously ground 20min and is placed in magnetic boat, in N2Under protective condition, with 5 DEG C of min-1Rate be warming up to 300 DEG C of calcinings
1h, then with 2 DEG C of min-1Rate be warming up to 500 DEG C calcining 2h, obtain carbon-coated NiS2.Carbon coating NiS in example 62With
Make electrode material, in 0.1A g-1Current density under charge and discharge cycles 100 enclose after tool 517mAh g-1Capacity.
Embodiment 7
Ni(DMG)2Preparation：2.00g dimethylglyoximes are dissolved in 200mL ethyl alcohol and remember solution A, 2.04g NiCl2·6H2O
It is dissolved in 50mL deionized waters and remembers solution B, it is 8.5 to adjust pH value.Under magnetic stirring, A is added drop-wise in B dropwise, is dripped
Continue to stir 5min after finishing, whole process temperature is controlled at 5 DEG C or less.Obtained product is washed into number with deionized water and ethyl alcohol
After secondary, 80 DEG C of vacuum drying 12h obtain red Ni (DMG)2。
Carbon coating NiS2Preparation：0.9313g aniline and 0.75g tartaric acid are dissolved in 150mL deionized waters, are added
0.9g Ni(DMG)2, after stirring 60min under condition of ice bath, the 50mL 0.2mol/L ammonium persulfates being preset in ice bath are added
Solution persistently stirs 6h under condition of ice bath, and obtained product deionized water and ethyl alcohol are washed for several times, 80 DEG C of vacuum drying
The Ni (DMG) of polyaniline-coated is obtained after 12h2.Finally by the Ni (DMG) of 0.2g polyaniline-coateds2With 0.4g sublimed sulfurs in mortar
Middle mixing is simultaneously ground 20min and is placed in magnetic boat, in N2Under protective condition, with 5 DEG C of min-1Rate be warming up to 300 DEG C of calcinings
1h, then with 2 DEG C of min-1Rate be warming up to 500 DEG C calcining 2h, obtain carbon-coated NiS2.Carbon coating NiS in example 72With
Make electrode material, in 0.1A g-1Current density under charge and discharge cycles 100 enclose after tool 492mAh g-1Capacity.
Embodiment 8
Ni(DMG)2Preparation：2.00g dimethylglyoximes are dissolved in 200mL ethyl alcohol and remember solution A, 2.04g NiCl2·6H2O
It is dissolved in 50mL deionized waters and remembers solution B, it is 8.5 to adjust pH value.Under magnetic stirring, A is added drop-wise in B dropwise, is dripped
Continue to stir 5min after finishing, whole process temperature is controlled at 5 DEG C or less.Obtained product is washed into number with deionized water and ethyl alcohol
After secondary, 80 DEG C of vacuum drying 12h obtain red Ni (DMG)2。
Carbon coating NiS2Preparation：0.9313g aniline and 0.75g tartaric acid are dissolved in 150mL deionized waters, are added
0.9g Ni(DMG)2, after stirring 30min under condition of ice bath, the 25mL 0.2mol/L ammonium persulfates being preset in ice bath are added
Solution persistently stirs 6h under condition of ice bath, and obtained product deionized water and ethyl alcohol are washed for several times, 80 DEG C of vacuum drying
The Ni (DMG) of polyaniline-coated is obtained after 12h2.Finally by the Ni (DMG) of 0.2g polyaniline-coateds2With 0.4g sublimed sulfurs in mortar
Middle mixing is simultaneously ground 20min and is placed in magnetic boat, in N2Under protective condition, with 5 DEG C of min-1Rate be warming up to 300 DEG C of calcinings
1h, then with 2 DEG C of min-1Rate be warming up to 500 DEG C calcining 2h, obtain carbon-coated NiS2.Carbon coating NiS in example 82With
Make electrode material, in 0.1A g-1Current density under charge and discharge cycles 100 enclose after tool 295mAh g-1Capacity.
Embodiment 9
Ni(DMG)2Preparation：2.00g dimethylglyoximes are dissolved in 200mL ethyl alcohol and remember solution A, 2.04g NiCl2·6H2O
It is dissolved in 50mL deionized waters and remembers solution B, it is 8.5 to adjust pH value.Under magnetic stirring, A is added drop-wise in B dropwise, is dripped
Continue to stir 5min after finishing, whole process temperature is controlled at 5 DEG C or less.Obtained product is washed into number with deionized water and ethyl alcohol
After secondary, 80 DEG C of vacuum drying 12h obtain red Ni (DMG)2。
Carbon coating NiS2Preparation：0.9313g aniline and 0.75g tartaric acid are dissolved in 150mL deionized waters, are added
0.9g Ni(DMG)2, after stirring 30min under condition of ice bath, the 75mL 0.2mol/L ammonium persulfates being preset in ice bath are added
Solution persistently stirs 6h under condition of ice bath, and obtained product deionized water and ethyl alcohol are washed for several times, 80 DEG C of vacuum drying
The Ni (DMG) of polyaniline-coated is obtained after 12h2.Finally by the Ni (DMG) of 0.2g polyaniline-coateds2With 0.4g sublimed sulfurs in mortar
Middle mixing is simultaneously ground 20min and is placed in magnetic boat, in N2Under protective condition, with 5 DEG C of min-1Rate be warming up to 300 DEG C of calcinings
1h, then with 2 DEG C of min-1Rate be warming up to 500 DEG C calcining 2h, obtain carbon-coated NiS2.Carbon coating NiS in example 92With
Make electrode material, in 0.1A g-1Current density under charge and discharge cycles 100 enclose after tool 376mAh g-1Capacity.
Embodiment 10
Ni(DMG)2Preparation：2.00g dimethylglyoximes are dissolved in 200mL ethyl alcohol and remember solution A, 2.04gNiCl2·6H2O
It is dissolved in 50mL deionized waters and remembers solution B, it is 8.5 to adjust pH value.Under magnetic stirring, A is added drop-wise in B dropwise, is dripped
Continue to stir 5min after finishing, whole process temperature is controlled at 5 DEG C or less.Obtained product is washed into number with deionized water and ethyl alcohol
After secondary, 80 DEG C of vacuum drying 12h obtain red Ni (DMG)2。
Carbon coating NiS2Preparation：0.9313g aniline and 0.75g tartaric acid are dissolved in 150mL deionized waters, are added
0.9g Ni(DMG)2, after stirring 30min under condition of ice bath, the 50mL 0.2mol/L ammonium persulfates being preset in ice bath are added
Solution persistently stirs 3h under condition of ice bath, and obtained product deionized water and ethyl alcohol are washed for several times, 80 DEG C of vacuum drying
The Ni (DMG) of polyaniline-coated is obtained after 12h2.Finally by the Ni (DMG) of 0.2g polyaniline-coateds2With 0.4g sublimed sulfurs in mortar
Middle mixing is simultaneously ground 20min and is placed in magnetic boat, in N2Under protective condition, with 5 DEG C of min-1Rate be warming up to 300 DEG C of calcinings
1h, then with 2 DEG C of min-1Rate be warming up to 500 DEG C calcining 2h, obtain carbon-coated NiS2.Carbon coating NiS in example 102With
Make electrode material, in 0.1A g-1Current density under charge and discharge cycles 100 enclose after tool 401mAh g-1Capacity.
Embodiment 11
Ni(DMG)2Preparation：2.00g dimethylglyoximes are dissolved in 200mL ethyl alcohol and remember solution A, 2.04g NiCl2·6H2O
It is dissolved in 50mL deionized waters and remembers solution B, it is 8.5 to adjust pH value.Under magnetic stirring, A is added drop-wise in B dropwise, is dripped
Continue to stir 5min after finishing, whole process temperature is controlled at 5 DEG C or less.Obtained product is washed into number with deionized water and ethyl alcohol
After secondary, 80 DEG C of vacuum drying 12h obtain red Ni (DMG)2。
Carbon coating NiS2Preparation：0.9313g aniline and 0.75g tartaric acid are dissolved in 150mL deionized waters, are added
0.9g Ni(DMG)2, after stirring 30min under condition of ice bath, the 50mL 0.2mol/L ammonium persulfates being preset in ice bath are added
Solution persistently stirs 12h under condition of ice bath, and obtained product deionized water and ethyl alcohol are washed for several times, and 80 DEG C of vacuum are dry
The Ni (DMG) of polyaniline-coated is obtained after dry 12h2.Finally by the Ni (DMG) of 0.2g polyaniline-coateds2It is being ground with 0.4g sublimed sulfurs
It is mixed in alms bowl and grinds 20min and be placed in magnetic boat, in N2Under protective condition, with 5 DEG C of min-1Rate be warming up to 300 DEG C of calcinings
1h, then with 2 DEG C of min-1Rate be warming up to 500 DEG C calcining 2h, obtain carbon-coated NiS2.Carbon coating NiS in example 112With
Make electrode material, in 0.1A g-1Current density under charge and discharge cycles 100 enclose after tool 503mAh g-1Capacity.
Embodiment 12
Ni(DMG)2Preparation：2.00g dimethylglyoximes are dissolved in 200mL ethyl alcohol and remember solution A, 2.04g NiCl2·6H2O
It is dissolved in 50mL deionized waters and remembers solution B, it is 8.5 to adjust pH value.Under magnetic stirring, A is added drop-wise in B dropwise, is dripped
Continue to stir 5min after finishing, whole process temperature is controlled at 5 DEG C or less.Obtained product is washed into number with deionized water and ethyl alcohol
After secondary, 80 DEG C of vacuum drying 12h obtain red Ni (DMG)2。
Carbon coating NiS2Preparation：0.9313g aniline and 0.75g tartaric acid are dissolved in 150mL deionized waters, are added
0.9g Ni(DMG)2, after stirring 15min under condition of ice bath, the 50mL 0.2mol/L ammonium persulfates being preset in ice bath are added
Solution persistently stirs 6h under condition of ice bath, and obtained product deionized water and ethyl alcohol are washed for several times, 80 DEG C of vacuum drying
The Ni (DMG) of polyaniline-coated is obtained after 12h2.Finally by the Ni (DMG) of 0.2g polyaniline-coateds2With 0.6g sublimed sulfurs in mortar
Middle mixing is simultaneously ground 20min and is placed in magnetic boat, in N2Under protective condition, with 5 DEG C of min-1Rate be warming up to 300 DEG C of calcinings
1h, then with 2 DEG C of min-1Rate be warming up to 500 DEG C calcining 2h, obtain carbon-coated NiS2.Carbon coating NiS in example 122With
Make electrode material, in 0.1A g-1Current density under charge and discharge cycles 100 enclose after tool 522mAh g-1Capacity.
Embodiment 13
Ni(DMG)2Preparation：2.00g dimethylglyoximes are dissolved in 200mL ethyl alcohol and remember solution A, 2.04g NiCl2·6H2O
It is dissolved in 50mL deionized waters and remembers solution B, it is 8.5 to adjust pH value.Under magnetic stirring, A is added drop-wise in B dropwise, is dripped
Continue to stir 5min after finishing, whole process temperature is controlled at 5 DEG C or less.Obtained product is washed into number with deionized water and ethyl alcohol
After secondary, 80 DEG C of vacuum drying 12h obtain red Ni (DMG)2。
Carbon coating NiS2Preparation：0.9313g aniline and 0.75g tartaric acid are dissolved in 150mL deionized waters, are added
0.9g Ni(DMG)2, after stirring 15min under condition of ice bath, the 50mL 0.2mol/L ammonium persulfates being preset in ice bath are added
Solution persistently stirs 6h under condition of ice bath, and obtained product deionized water and ethyl alcohol are washed for several times, 80 DEG C of vacuum drying
The Ni (DMG) of polyaniline-coated is obtained after 12h2.Finally by the Ni (DMG) of 0.2g polyaniline-coateds2With 0.8g sublimed sulfurs in mortar
Middle mixing is simultaneously ground 20min and is placed in magnetic boat, in N2Under protective condition, with 5 DEG C of min-1Rate be warming up to 300 DEG C of calcinings
1h, then with 2 DEG C of min-1Rate be warming up to 500 DEG C calcining 2h, obtain carbon-coated NiS2.Carbon coating NiS in example 132With
Make electrode material, in 0.1A g-1Current density under charge and discharge cycles 100 enclose after tool 519mAh g-1Capacity.
Claims (10)
1. a kind of carbon coating NiS2The preparation method of material, it is characterised in that：Include the following steps：
1) dimethylglyoxime synthesizes Ni (DMG) with nickel salt by complexation reaction2Club shaped structure；
2) at Ni (DMG)2Club shaped structure surface coats polyaniline by in-situ polymerization, obtains Ni (DMG)2Club shaped structure@polyanilines
Compound；
3)Ni(DMG)2It after club shaped structure@Polyanilines are mixed with elemental sulfur, is placed under protective atmosphere, carries out calcination processing,
To obtain the final product.
2. a kind of carbon coating NiS according to claim 12The preparation method of material, it is characterised in that：By dimethylglyoxime alcohol
Solution is added dropwise in nickel salt aqueous solution, and it is 7.5~9 to maintain the pH of solution system, and temperature is stirred to react within the scope of 0~10 DEG C,
Obtain Ni (DMG)2Club shaped structure.
3. a kind of carbon coating NiS according to claim 12The preparation method of material, it is characterised in that：
The in-situ polymerization process is：By Ni (DMG)2Club shaped structure is dispersed in the solution containing aniline and tartaric acid, is added and is caused
Agent initiated polymerization obtains Ni (DMG)2Club shaped structure@Polyanilines.
4. a kind of carbon coating NiS according to claim 32The preparation method of material, it is characterised in that：
Aniline and Ni (DMG)2The mass ratio of club shaped structure is 0.5:1~5:1；
The mass ratio of tartaric acid and aniline is 0.5:1~2:1.
5. a kind of carbon coating NiS according to claim 32The preparation method of material, it is characterised in that：
The polymerisation is carried out in the environment of ice domain, and polymerization reaction time is 3~12h.
6. a kind of carbon coating NiS according to claim 12The preparation method of material, it is characterised in that：
Ni(DMG)2The mass ratio of club shaped structure@Polyanilines and elemental sulfur is 1:2~1:5.
7. a kind of carbon coating NiS according to claim 12The preparation method of material, it is characterised in that：
Ni(DMG)2Club shaped structure@Polyanilines pass through ground and mixed with elemental sulfur.
8. a kind of carbon coating NiS according to claim 12The preparation method of material, it is characterised in that：The calcination processing
Process be：With 3~7 DEG C of min-1Heating rate is warming up to 250~350 DEG C of 0.5~1.5h of calcining, then with 1~3 DEG C of min-1It rises
Warm rate is warming up to 450~550 DEG C of 1~3h of calcining.
9. a kind of carbon coating NiS2Material, it is characterised in that：It is obtained by any one of claim 1~8 preparation method.
10. the carbon coating NiS described in claim 92The application of material, it is characterised in that：It is answered as anode material of lithium-ion battery
With.
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| CN110911684A (en) * | 2019-11-22 | 2020-03-24 | 广东工业大学 | Antimony-doped cobalt disulfide-loaded graphene and preparation method and application thereof |
| CN111268734A (en) * | 2020-02-13 | 2020-06-12 | 广州大学 | Transition metal sulfide nanosheet and preparation method and application thereof |
| CN111584840A (en) * | 2020-05-07 | 2020-08-25 | 武汉理工大学 | Carbon cloth loaded carbon-coated nickel disulfide nanosheet composite material and preparation method and application thereof |
| CN112582618A (en) * | 2020-12-14 | 2021-03-30 | 安徽大学 | Preparation method of nickel sulfide nanosheet anchored on inner surface of nitrogen-containing hollow carbon substrate, prepared product and application of product |
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| CN111268734B (en) * | 2020-02-13 | 2022-06-14 | 广州大学 | Transition metal sulfide nanosheet and preparation method and application thereof |
| CN111584840A (en) * | 2020-05-07 | 2020-08-25 | 武汉理工大学 | Carbon cloth loaded carbon-coated nickel disulfide nanosheet composite material and preparation method and application thereof |
| CN112582618A (en) * | 2020-12-14 | 2021-03-30 | 安徽大学 | Preparation method of nickel sulfide nanosheet anchored on inner surface of nitrogen-containing hollow carbon substrate, prepared product and application of product |
| CN112687862A (en) * | 2020-12-28 | 2021-04-20 | 华南理工大学 | Carbon nanotube coated cobalt disulfide/sulfide solid electrolyte composite positive electrode material and preparation method and application thereof |
| CN113036097A (en) * | 2021-02-04 | 2021-06-25 | 淮阴工学院 | Sulfur vacancy nitrogen doped carbon coated nickel sulfide composite electrode material and preparation method thereof |
| CN113270583A (en) * | 2021-05-19 | 2021-08-17 | 惠州亿纬锂能股份有限公司 | Vulcanized polymer composite material, positive pole piece comprising vulcanized polymer composite material, and preparation method and application of positive pole piece |
| CN113437277A (en) * | 2021-07-20 | 2021-09-24 | 广东工业大学 | Bi2S3/NiS2@ C negative electrode material, sodium ion battery and preparation method of sodium ion battery |
| CN113437277B (en) * | 2021-07-20 | 2022-08-05 | 广东工业大学 | Bi 2 S 3 /NiS 2 @ C negative electrode material, sodium ion battery and preparation method of sodium ion battery |
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