CN105609715B - Ti doped nickel ion doped anode material for lithium-ion batteries of a kind of aluminium and preparation method thereof - Google Patents
Ti doped nickel ion doped anode material for lithium-ion batteries of a kind of aluminium and preparation method thereof Download PDFInfo
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- H01M10/05—Accumulators with non-aqueous electrolyte
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- H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
- H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
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- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
- H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
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Abstract
The invention discloses Ti doped nickel ion doped anode material for lithium-ion batteries of a kind of aluminium and preparation method thereof, the chemical formula of the Ti doped nickel ion doped of the aluminium is：LiNi0.5Mn(1.5‑2x)AlxTixO4；Wherein, 0.02≤x≤0.08.The present invention in nickel ion doped lattice by introducing the elements of the ratio between aluminium, titanium both amounts with particular ionic radius, chemical valence and substance, so that the Ti doped nickel ion doped anode material for lithium-ion batteries of the aluminium prepared lattice damage degree in charge and discharge process is small, cyclical stability is high, can keep larger specific capacity.
Description
Technical field
The present invention relates to field of lithium ion battery material, and in particular to a kind of Ti doped nickel ion doped lithium-ion electric of aluminium
Pond positive electrode and preparation method thereof.
Background technology
Nickel lithium manganate cathode material the up to discharge platform of 4.7V or so and its in cost, environment, synthesis technology, original
Material source etc. has a series of advantages that other materials do not possess, so, nickel lithium manganate cathode material is that one kind has
The anode material for lithium-ion batteries of rosy prospect.
Compared with lithium-rich manganese-based class and NCA positive electrodes, the output voltage of nickel lithium manganate cathode material is high, it is at low cost, close
Into simple for process；With cobalt phosphate lithium and LiVPO4F positive electrodes are compared, and nickel lithium manganate cathode material is much smaller than the pollution of environment
The two；Compared with lithium cobaltate cathode material, the output voltage of nickel lithium manganate cathode material is high, at low cost, environmental-friendly；With mangaic acid
Lithium anode material is compared, and stability of the nickel lithium manganate cathode material under high temperature circulation greatly improves；With ferrous lithium phosphate cathode
Material is compared, and nickel lithium manganate cathode material preparation process is simple, and the lot stability of production is good, particularly with lithium titanate anode
When matching, LiFePO 4-lithium titanate single battery only has 1.9V output voltages, and nickel ion doped-lithium titanate single battery
Output voltage may be up to 3.2V, and advantage is clearly.
Although nickel lithium manganate cathode material has many advantages, such as, in actual application, people also encounter
A series of problems, current most important problem are needs of the cyclical stability it is impossible to meet lithium ion battery of material.Institute
With people have made intensive studies the study on the modification of nickel ion doped.
Application publication number be CN104638259A application for a patent for invention document disclose it is a kind of improvement nickel ion doped lithium from
The method of sub- positive electrode cycle performance, this method are carried out synthesis and the surface modification of nickel ion doped using solid phase method, prepared
Technique includes the following steps：(1) by nickel source and manganese source and lithium source ground and mixed it is uniform after, obtained after drying, low-temperature sintering
Nickel ion doped presoma；(2) by the nickel ion doped presoma prepared and lithium source, vanadium source and dispersant it is uniform after, warp
After crossing dry, high temperature sintering, the nickel lithium manganate cathode material that lithium vanadate modification is passed through on surface is obtained.The nickel mangaic acid of the modification
Lithium anode material has good cycle performance.
Application publication number is that the application for a patent for invention document of CN104538604A discloses a kind of nickel lithium manganate cathode material
Surface modifying method, this method includes the following steps：(1) nickel ion doped powder is immersed in 10~60min in activated solution,
It is washed to neutrality；(2) nickel ion doped of activated processing obtained above is heated in constant temperature electric heating case, heating temperature is
300~350 DEG C, soaking time is 20~40min, obtains the nickel ion doped matrix for having elemental nickel to surface；(3) by above-mentioned processing
The nickel ion doped matrix that there is elemental nickel on surface is poured into chemical plating fluid, and magnetic agitation or ultrasonic disperse are carried out to it, 20~
Then 60min is filtered, washing is dried in vacuo the nickel ion doped material to get nickel coated.The invention uses supersonic chemical plating nickel
It realizes and the coated with uniform of nickel ion doped material is modified, the cycle performance of the material after cladding is improved significantly.
But the modification carried out is typically that the cyclical stability of material, institute are promoted under the premise of expendable material capacity
With the present invention is intended to provide it is a kind of can promote material circulation stability while keep again material specific capacity doping method.
Invention content
The present invention provides Ti doped nickel ion doped anode material for lithium-ion batteries of a kind of aluminium and preparation method thereof, adopt
The Ti doped nickel ion doped anode material for lithium-ion batteries of the aluminium that is prepared with this method can not only promote following for material
Ring stability, while the specific capacity of material can be kept again.
A kind of Ti doped nickel ion doped anode material for lithium-ion batteries of aluminium, the Ti doped nickel ion doped of the aluminium
Chemical formula is：LiNi0.5Mn(1.5-2x)AlxTixO4；Wherein, 0.02≤x≤0.08.
The present invention selects aluminium and titanium as doped chemical, the reason is that, the radius size sequence of both element ions is such as
Under, Mn4+＜ Al3+＜ Ti4+＜ Mn3+, it is this unique to be doped into a kind of larger high valence ion of radius and a kind of half in the material
The smaller low price ion method of diameter can be in the case of the most of specific capacity for keeping material, while the cycle for promoting material is steady
It is qualitative.
Since dopant radius is all in Mn4+And Mn3+Between, so the lattice constant of material is basically unchanged after doping,
Make the structure remained stable of material, and since Ti-O keys are compared with Mn-O keys stabilization, Al3+Presence improve the orderly of material structure
Degree, so the cyclical stability of material is improved, simultaneously because Ti4+Presence can make Mn in material3+Ratio increases,
The specific capacity of material is improved to a certain degree.
It is further preferred that 0.03≤x≤0.06；When x is too small, chanza unobvious can be to the structure of material when x is excessive
It impacts, and then influences the specific capacity and cyclical stability of material.
The invention also discloses a kind of preparation method of the Ti doped nickel ion doped anode material for lithium-ion batteries of aluminium, packets
It includes：
(1) lithium source, nickel source, manganese source, silicon source, titanium source and citric acid are mixed, presoma is made using sol-gel method；
(2) presoma is calcined, obtains the Ti doped nickel ion doped anode material for lithium-ion batteries of the aluminium.
In step (1), the sol-gel method includes the following steps：
(A) after lithium source, nickel source, manganese source, silicon source being dissolved in water respectively, mixing, it is 1 to add in nitric acid to mixed solution pH value,
Obtain mixed solution A；
(B) titanium source is dissolved in the ethanol solution containing citric acid, obtains mixed solution B；
(C) mixed solution A with mixed solution B is mixed, obtains presoma.
Wherein, in step (1), the Ni in Li, nickel source, the Mn in manganese source, the Al in silicon source, the Ti in titanium source in lithium source
Molar ratio with citric acid is 1.05：0.5：(1.5-2x)：x：x：1；Wherein, 0.02≤x≤0.08.
Specifically, the lithium source is lithium acetate；The nickel source is nickel acetate or nickel nitrate；The manganese source is acetic acid
Manganese or manganese nitrate.
Preferably, the silicon source is aluminum nitrate or aluminum acetate.
Preferably, the titanium source is tetrabutyl titanate.
In step (2), the temperature of the calcining is 800~850 DEG C, and the time is 12~15h, and heating rate during calcining is
2℃/min.Temperature is too low or calcination time is too short that material crystalline can be caused incomplete, and temperature is excessively high and calcination time is long to increase
Add material production cost.Material can generate certain gas in calcination process, if heating rate it is too fast can cause to generate it is more
Gap causes material reaction insufficient, results even in raw material and fly out reaction unit.
Compared with prior art, the invention has the advantages that：
The present invention by nickel ion doped lattice introduce aluminium, titanium both with particular ionic radius, chemical valence and object
The element of the ratio between the amount of matter so that the Ti doped nickel ion doped anode material for lithium-ion batteries of the aluminium for preparing is in charge and discharge
Lattice damage degree is small in the process, and cyclical stability is high, can keep larger specific capacity.
Description of the drawings
Fig. 1 is the XRD diagram of the nickel ion doped anode material for lithium-ion batteries that aluminium is Ti doped in the embodiment of the present invention 1；
Fig. 2 is the SEM figures of the nickel ion doped anode material for lithium-ion batteries that aluminium is Ti doped in the embodiment of the present invention 1；
Fig. 3 is that the charge and discharge of the nickel ion doped anode material for lithium-ion batteries that aluminium is Ti doped in the embodiment of the present invention 1 are bent
Line chart；
Fig. 4 is the cycle performance of the nickel ion doped anode material for lithium-ion batteries that aluminium is Ti doped in the embodiment of the present invention 1
Curve graph；
Fig. 5 is the cycle performance of the nickel ion doped anode material for lithium-ion batteries that aluminium is Ti doped in the embodiment of the present invention 2
Curve graph；
Fig. 6 is the cycle performance of the nickel ion doped anode material for lithium-ion batteries that aluminium is Ti doped in the embodiment of the present invention 3
Curve graph；
Fig. 7 is the cycle performance curve graph of the nickel ion doped anode material for lithium-ion batteries that aluminium is Ti doped in comparative example 1；
Fig. 8 is the cycle performance curve graph of the nickel ion doped anode material for lithium-ion batteries that aluminium is Ti doped in comparative example 2；
Fig. 9 is the cycle performance curve graph of the nickel ion doped anode material for lithium-ion batteries that aluminium is Ti doped in comparative example 3；
Figure 10 is the cycle performance curve of the nickel ion doped anode material for lithium-ion batteries that aluminium is Ti doped in comparative example 4
Figure.
Specific embodiment
With reference to specific embodiment, the present invention is further elaborated.
Embodiment 1
A kind of Ti doped nickel ion doped anode material for lithium-ion batteries of aluminium, preparation method are as follows：
(1) by the acetic acid of the lithium acetate of 0.105mol, the nickel acetate of 0.05mol, the manganese acetate of 0.14mol and 0.05mol
Aluminium is respectively dissolved in deionized water, after forming the solution of 50mL, then is mixed, and nitric acid tune is added in into mixed solution
The pH value of solution stirs 5min, obtains mixed solution A to 1 after section mixing；
(2) tetrabutyl titanate of 0.05mol is dissolved in the 200mL ethanol solutions containing 0.1mol citric acids,
5min is stirred, obtains mixed solution B；
(3) it is kept stirring, mixed solution A is added in mixed solution B, after stirring at normal temperature 3h, obtain mixed solution C；
Mixed solution C is heated at (4) 80 DEG C, is stirred, until solvent evaporated, adds in baking oven and dried at 120 DEG C, be placed in horse
12h not is calcined at 800 DEG C in stove, obtains the Ti doped nickel ion doped anode material for lithium-ion batteries of aluminium.
The chemical formula of the Ti doped nickel ion doped anode material for lithium-ion batteries of the aluminium is：
LiNi0.5Mn1.4Al0.05Ti0.05O4；Its XRD diagram, SEM figures and charging and discharging curve figure and cycle performance curve respectively as Fig. 1,2,3,
Shown in 4.
As can be seen from Fig., the product of embodiment 1 can have higher electric discharge simultaneously compared with comparative example 1,2,3,4
Specific capacity and cyclical stability.
Embodiment 2
A kind of Ti doped nickel ion doped anode material for lithium-ion batteries of aluminium, preparation method are as follows：
(1) by the acetic acid of the lithium acetate of 0.105mol, the nickel acetate of 0.05mol, the manganese acetate of 0.144mol and 0.03mol
Aluminium is respectively dissolved in deionized water, after forming the solution of 50mL, then is mixed, and nitric acid tune is added in into mixed solution
The pH value of solution stirs 5min, obtains mixed solution A to 1 after section mixing；
(2) tetrabutyl titanate of 0.03mol is dissolved in the 200mL ethanol solutions containing 0.1mol citric acids,
5min is stirred, obtains mixed solution B；
(3) it is kept stirring, mixed solution A is added in mixed solution B, after stirring at normal temperature 3h, obtain mixed solution C；
Mixed solution C is heated at (4) 80 DEG C, is stirred, until solvent evaporated, adds in baking oven and dried at 120 DEG C, be placed in horse
15h not is calcined at 800 DEG C in stove, obtains the Ti doped nickel ion doped anode material for lithium-ion batteries of aluminium.
The chemical formula of the Ti doped nickel ion doped anode material for lithium-ion batteries of the aluminium is：
LiNi0.5Mn1.44Al0.03Ti0.03O4；Its cycle performance curve is as shown in Figure 5.
Compared with comparative example 1,2,3,4, embodiment 2 also has higher specific discharge capacity and cyclical stability simultaneously.
Embodiment 3
A kind of Ti doped nickel ion doped anode material for lithium-ion batteries of aluminium, preparation method are as follows：
(1) by the acetic acid of the lithium acetate of 0.105mol, the nickel nitrate of 0.05mol, the manganese acetate of 0.138mol and 0.04mol
Aluminium is respectively dissolved in deionized water, after forming the solution of 50mL, then is mixed, and nitric acid tune is added in into mixed solution
The pH value of solution stirs 5min, obtains mixed solution A to 1 after section mixing；
(2) tetrabutyl titanate of 0.04mol is dissolved in the 200mL ethanol solutions containing 0.1mol citric acids,
10min is stirred, obtains mixed solution B；
(3) it is kept stirring, mixed solution A is added in mixed solution B, after stirring at normal temperature 4h, obtain mixed solution C；
Mixed solution C is heated at (4) 80 DEG C, is stirred, until solvent evaporated, adds in baking oven and dried at 140 DEG C, be placed in horse
14h not is calcined at 820 DEG C in stove, obtains the Ti doped nickel ion doped anode material for lithium-ion batteries of aluminium.
The chemical formula of the Ti doped nickel ion doped anode material for lithium-ion batteries of the aluminium is：
LiNi0.5Mn1.38Al0.04Ti0.04O4；Its cycle performance curve difference is as shown in Figure 6.
From fig. 6 it can be seen that the product of embodiment 3 compared with comparative example 1,2,3,4, can have higher put simultaneously
Electric specific capacity and cyclical stability.
Comparative example 1
A kind of nickel ion doped anode material for lithium-ion batteries, preparation method are as follows：
(1) by the acetic acid of the lithium acetate of 0.105mol, the nickel acetate of 0.05mol, the manganese acetate of 0.145mol and 0.01mol
Aluminium is respectively dissolved in deionized water, after forming the solution of 50mL, then is mixed, and nitric acid tune is added in into mixed solution
The pH value of solution stirs 5min, obtains mixed solution A to 1 after section mixing；
(2) the 200mL ethanol solutions of the citric acid containing 0.1mol are prepared, stir 5min, obtain mixed solution B；
(3) it is kept stirring, mixed solution A is added in mixed solution B, after stirring at normal temperature 3h, obtain mixed solution C；
Mixed solution C is heated at (4) 80 DEG C, is stirred, until solvent evaporated, adds in baking oven and dried at 120 DEG C, be placed in horse
12h not is calcined at 800 DEG C in stove, obtains the Ti doped nickel ion doped anode material for lithium-ion batteries of aluminium.
The chemical formula of the Ti doped nickel ion doped anode material for lithium-ion batteries of the aluminium is：LiNi0.5Mn1.45Al0.05O4；
Cycle performance curve is as shown in Figure 7.
From figure 7 it can be seen that although the sample of single aluminium doping has good cyclical stability, which puts
Electric specific capacity is relatively low.
Comparative example 2
A kind of nickel ion doped anode material for lithium-ion batteries, preparation method are as follows：
(1) by the acetic acid of the lithium acetate of 0.105mol, the nickel acetate of 0.05mol, the manganese acetate of 0.145mol and 0.01mol
Aluminium is respectively dissolved in deionized water, after forming the solution of 50mL, then is mixed, and nitric acid tune is added in into mixed solution
The pH value of solution stirs 5min, obtains mixed solution A to 1 after section mixing；
(2) tetrabutyl titanate of 0.01mol is dissolved in the 200mL ethanol solutions containing 0.1mol citric acids,
5min is stirred, obtains mixed solution B；
(3) it is kept stirring, mixed solution A is added in mixed solution B, after stirring at normal temperature 3h, obtain mixed solution C；
Mixed solution C is heated at (4) 80 DEG C, is stirred, until solvent evaporated, adds in baking oven and dried at 120 DEG C, be placed in horse
12h not is calcined at 800 DEG C in stove, obtains the Ti doped nickel ion doped anode material for lithium-ion batteries of aluminium.
The chemical formula of the Ti doped nickel ion doped anode material for lithium-ion batteries of the aluminium is：
LiNi0.5Mn1.48Al0.01Ti0.01O4；Its cycle performance curve is as shown in Figure 8.
As it can be observed in the picture that the cyclical stability of material and specific discharge capacity do not have when the doping of aluminium titanium is all 0.01
Standby clear superiority.
Comparative example 3
A kind of Ti doped nickel ion doped anode material for lithium-ion batteries of aluminium, preparation method are as follows：
(1) by the aluminum acetate of the lithium acetate of 0.105mol, the nickel nitrate of 0.05mol, the manganese acetate of 0.13mol and 0.1mol
It is respectively dissolved in deionized water, after forming the solution of 50mL, then is mixed, nitric acid is added in into mixed solution and is adjusted
The pH value of solution stirs 10min, obtains mixed solution A to 1 after mixing；
(2) tetrabutyl titanate of 0.1mol is dissolved in the 200mL ethanol solutions containing 0.1mol citric acids, stirred
8min is mixed, obtains mixed solution B；
(3) it is kept stirring, mixed solution A is added in mixed solution B, after stirring at normal temperature 3h, obtain mixed solution C；
Mixed solution C is heated at (4) 80 DEG C, is stirred, until solvent evaporated, adds in baking oven and dried at 140 DEG C, be placed in horse
13h not is calcined at 850 DEG C in stove, obtains the Ti doped nickel ion doped anode material for lithium-ion batteries of aluminium.
The chemical formula of the Ti doped nickel ion doped anode material for lithium-ion batteries of the aluminium is：
LiNi0.5Mn1.3Al0.1Ti0.1O4；Its cycle performance curve difference is as shown in Figure 9.
From fig. 9, it can be seen that the specific discharge capacity of the product of comparative example 3 declines significantly compared to the examples,.
Comparative example 4
A kind of nickel ion doped anode material for lithium-ion batteries, preparation method are as follows：
(1) by the lithium acetate of 0.105mol, the nickel acetate of 0.05mol, 0.145mol manganese acetate be respectively dissolved in from
It in sub- water, after forming the solution of 50mL, then is mixed, the pH that nitric acid adjusts solution after mixing is added in into mixed solution
Value stirs 4min, obtains mixed solution A to 1；
(2) tetrabutyl titanate of 0.05mol is dissolved in the 200mL ethanol solutions containing 0.1mol citric acids,
4min is stirred, obtains mixed solution B；
(3) it is kept stirring, mixed solution A is added in mixed solution B, after stirring at normal temperature 5h, obtain mixed solution C；
Mixed solution C is heated at (4) 80 DEG C, is stirred, until solvent evaporated, adds in baking oven and dried at 120 DEG C, be placed in horse
13h not is calcined at 850 DEG C in stove, obtains the Ti doped nickel ion doped anode material for lithium-ion batteries of aluminium.
The chemical formula of the Ti doped nickel ion doped anode material for lithium-ion batteries of the aluminium is：LiNi0.5Mn1.45Ti0.05O4；
Its cycle performance curve is as shown in Figure 10.
As can be seen from Figure 10, if Doped with Titanium, the stable circulation sex expression of material is poor.
Claims (1)
1. a kind of preparation method of the Ti doped nickel ion doped anode material for lithium-ion batteries of aluminium, which is characterized in that including：
(1) it is the aluminum acetate of the lithium acetate of 0.105mol, the nickel acetate of 0.05mol, the manganese acetate of 0.14mol and 0.05mol is each
It from being dissolved in deionized water, after forming the solution of 50mL, then is mixed, it is mixed that nitric acid adjusting is added in into mixed solution
The pH value of solution stirs 5min, obtains mixed solution A to 1 after conjunction；
(2) tetrabutyl titanate of 0.05mol is dissolved in the 200mL ethanol solutions containing 0.1mol citric acids, stirred
5min obtains mixed solution B；
(3) it is kept stirring, mixed solution A is added in mixed solution B, after stirring at normal temperature 3h, obtain mixed solution C；
Mixed solution C is heated at (4) 80 DEG C, is stirred, until solvent evaporated, adds in baking oven and dried at 120 DEG C, be placed in Muffle furnace
In calcine 12h at 800 DEG C, obtaining chemical formula is：LiNi0.5Mn1.4Al0.05Ti0.05O4The Ti doped nickel ion doped lithium of aluminium from
Sub- cell positive material.
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| CN106784626A (en) * | 2017-02-28 | 2017-05-31 | 四川富骅新能源科技有限公司 | A kind of anode material for lithium-ion batteries and preparation method thereof |
| CN107845799A (en) * | 2017-11-07 | 2018-03-27 | 重庆特瑞新能源材料有限公司 | A kind of preparation method of titaniferous anode material for lithium-ion batteries |
| CN111029539A (en) * | 2019-11-11 | 2020-04-17 | 淮安新能源材料技术研究院 | Doped lithium manganate anode material coated with aluminum oxide and preparation method thereof |
| CN113461064B (en) * | 2021-06-18 | 2023-01-06 | 宜宾职业技术学院 | High-capacity cathode material nano Li 1.3 Mn 0.4 Ti 0.3 O 2 Preparation method of (1) |
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| CN103400978A (en) * | 2013-08-01 | 2013-11-20 | 奇瑞汽车股份有限公司 | Method for modifying lithium nickel manganese oxide material, lithium nickel manganese oxide material and lithium ion battery |
| CN104425809A (en) * | 2013-08-28 | 2015-03-18 | 奇瑞汽车股份有限公司 | Lithium ion battery positive electrode material, preparation method of lithium ion battery positive electrode material, lithium ion battery comprising lithium ion battery positive electrode material |
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