CN107959017A - A kind of solid carbon ball lithium ion battery negative material of graphene/oxide coated by zinc and preparation method thereof - Google Patents
A kind of solid carbon ball lithium ion battery negative material of graphene/oxide coated by zinc and preparation method thereof Download PDFInfo
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- CN107959017A CN107959017A CN201711427162.3A CN201711427162A CN107959017A CN 107959017 A CN107959017 A CN 107959017A CN 201711427162 A CN201711427162 A CN 201711427162A CN 107959017 A CN107959017 A CN 107959017A
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Abstract
The present invention relates to ion cathode material lithium technical field, discloses solid carbon ball lithium ion battery negative material of a kind of graphene/oxide coated by zinc and preparation method thereof, comprises the following steps：S1. solid carbon ball is prepared；S11. glucose solution is prepared, then adds and hydro-thermal reaction is carried out in reaction kettle, natural cooling after having reacted, centrifuges to pH to 7, then dry, dried product is calcined, obtain solid carbon ball；S2. graphene is dissolved in deionized water, add dispersant, ultrasonic disperse obtains graphene solution, then zinc nitrate, ammonium hydroxide are sequentially added into graphene solution, 2~6h of uniform stirring under 90 DEG C of water-baths, then adds solid carbon ball, it is transferred to after stirring evenly in autoclave, hydro-thermal reaction is carried out at 90~120 DEG C, the reaction time is 6~24h, is centrifuged after having reacted and dry；S3. dried product is calcined, finally obtains the solid carbon ball lithium ion battery negative material of graphene/oxide coated by zinc.
Description
Technical field
It is real more particularly, to a kind of graphene/oxide coated by zinc the present invention relates to ion cathode material lithium technical field
Heart carbon ball lithium ion battery negative material and preparation method thereof.
Background technology
The negative material of lithium ion battery realizes the embedding of lithium ion primarily as the main body of storage lithium in charge and discharge process
Enter and deintercalation.From the point of view of the development of lithium ion, decisive role is played in the appearance of the research of negative material to lithium ion battery.Often
The lithium ion battery negative material seen, such as graphite cathode material, titanium system negative material, but graphite cathode material is due to its current potential
With the current potential of metal lithium electrode very close to so when battery iterative cycles and when overcharging, the easy precipitating metal lithium of graphite surface can be because
Formed dendrite and it is short-circuit, be also easy to cause thermal runaway when temperature is excessive.Titanium system negative material electric conductivity is very poor, and relative to
The current potential of lithium metal is higher and measures the characteristics of relatively low.
It is well known that zinc oxide is since it is with outstanding catalytic efficiency, tinctorial property, antisepsis, ultraviolet screener
The performances such as ability, biological antibiotic, are widely used in chemical industry, rubber industry, coating, health care and food service industry etc..But Europe
It is severe poisonous chemicals that alliance, which delimit zinc oxide, and statement must be strictly controlled zinc oxide preparing macromolecule product process
Use.Meanwhile United States environmental protection agency also assert that zinc oxide has very big toxic action to water plant.Therefore, reduce
Dosage of the zinc oxide in macromolecule product is imperative.And common zinc oxide is compared to, nano zine oxide has more
Big specific surface area, reactivity higher.During the reaction, nano zine oxide and other reaction promoters can greatly be increased
Contact, further promote reaction progress.
The two dimensional crystal carbon material that graphene is made of one layer of intensive carbon atom being wrapped in honeycomb crystal lattice,
The fullerene of zero dimension can be warped into, one-dimensional carbon nanotubes is rolled into or is stacked to the graphite of three-dimensional, therefore graphene is structure
Into the elementary cell of other graphite materials.Compared with carbon nanotubes, graphene has more excellent property, for example, good
Electric conductivity (103~104S/m), specific surface area (2630m of super large2/ g), chemical property is stable and machinability etc., this causes
It becomes the electrode material that electrochemistry new energy more more preferable than carbon nanotubes is converted and stored.But in practical applications, Van der Waals
The effect of power make its easily reunite or again stacking and cause the not high result of actual specific capacitance.Graphene-based composite material then has
This problem for overcoming graphene of effect, due to positive synergistic effect so that other components in composite material effectively prevent
The reunion of graphene, so that the electric double layer capacitance of graphene is shown well, effectively raises whole material
Specific capacitance.
But research graphene/zinc oxide composite is less at present, Chinese patent CN101857222A, using hydro-thermal method
Graphene/zinc oxide composite is prepared, and proposes to be applied to the side such as sensor, solar cell and novel nano device
The application prospect in face.Meanwhile Chinese patent CN102654474A, using the method being simply mixed, by graphene and zinc oxide point
Dissipate in solvent, graphene/zinc-oxide film is further prepared, and be applied to detection gas.In addition Chinese patent
Zinc oxide-transparent graphene conductive film is prepared using sol-gal process in CN103199126A, and proposes to be used as saturating
Bright electro-conductive glass applies to solar film battery etc..But these preparation methods there are one it is common the problem of, be exactly not
Can be during graphene/zinc oxide composite be prepared, the effective reunion for controlling graphene.
The content of the invention
The technical problem to be solved in the present invention is in view of the deficiencies of the prior art, in graphene/zinc oxide composite
It is middle to introduce solid carbon ball, the stacking again of graphene sheet layer is prevented, significantly reduces the reunion of graphene, there is provided Yi Zhongshi
The black solid carbon ball lithium ion battery negative material of alkene/oxide coated by zinc.
The present invention also provides the preparation side of the solid carbon ball lithium ion battery negative material of the graphene/oxide coated by zinc
Method.
The purpose of the present invention is achieved through the following technical solutions：
There is provided a kind of graphene/oxide coated by zinc solid carbon ball lithium ion battery negative material preparation method, including it is following
Step：
S1. solid carbon ball is prepared；
S11. glucose solution is prepared, then adds and hydro-thermal reaction is carried out in reaction kettle, natural cooling after having reacted, from
Then the heart is dried to pH to 7, dried product is calcined, obtain solid carbon ball；
S2. graphene is dissolved in deionized water, adds dispersant, ultrasonic disperse obtains graphene solution, then to stone
Zinc nitrate, ammonium hydroxide are sequentially added in black alkene solution, 2~6h of uniform stirring under 90 DEG C of water-baths, then adds solid carbon ball, stirring
It is transferred to after uniformly in autoclave, hydro-thermal reaction is carried out at 90~120 DEG C, the reaction time is 6~24h, after having reacted
Centrifuge and dry；
S3. dried product is calcined, under nitrogen protection, under the conditions of 1~3 DEG C/min temperature programmings, 400~
500 DEG C of 0.5~1h of holding, then at 600~800 DEG C, keep 1~3h, finally obtain graphene/oxide coated by zinc solid carbon
Ball lithium ion battery negative material.
Further, the concentration of glucose solution described in step S11 is 0.04~0.20g/ml.
Further, the temperature of hydro-thermal reaction described in step S11 is 120~160 DEG C, and the reaction time is 12~24h.
Further, the temperature of hydro-thermal reaction described in step S11 is 120~160 DEG C, and the reaction time is 12~24h.
Further, dispersant described in step S2 is graphene quantum dot.
Further, the addition of the graphene quantum dot is 1~5wt%.
Further, the mass ratio of zinc nitrate and ammonium hydroxide described in step S2 is 1~1.5:1.
Further, the amount ratio of the material of graphene and zinc ion described in step S2 is 1：1~1.5.
Further, graphene described in step S2 and the mass ratio of solid carbon ball are 1:1~2.
The solid carbon ball lithium ion battery negative material of graphene/oxide coated by zinc that the present invention is prepared be applied to lithium from
Sub- cell negative electrode material.
Compared with prior art, the present invention has following beneficial effect：
The present invention introduces solid carbon ball in graphene/zinc oxide material, by the superior electric conductivity of graphene and hole
The solid carbon chou of structure-rich closes, the two produces synergistic effect, can occur between one side graphene oxide and solid carbon ball
Polymerisation, so as to have bonding action between solid carbon ball and graphene, can form uniform graphene-solid carbon ball composite junction
Structure, the on the other hand presence of solid carbon ball have been also prevented from the stacking again of graphene sheet layer, have significantly reduced the group of graphene
It is poly-.
The present invention calcined by secondary temperature elevation, avoid quickly heating can cause scattered graphene further in conjunction with into
Thicker graphite, being more advantageous to solid carbon ball and graphene, compound produce acts synergistically therebetween.
Preparation process of the present invention is simple, green pollution-free, and of low cost, derives from a wealth of sources, it can be achieved that scale
Industrial production.
Embodiment
The present invention is further illustrated with reference to specific embodiment.Following embodiments are only illustrative examples, not structure
Into inappropriate limitation of the present invention, the multitude of different ways that the present invention can be limited and covered by the content of the invention is implemented.It is unless special
Do not mentionlet alone bright, the present invention reagent, compound and the equipment that use is the art conventional reagent, compound and equipment.
Embodiment 1
The present embodiment provides a kind of solid carbon ball lithium ion battery negative material preparation method of graphene/oxide coated by zinc,
Comprise the following steps：
S1. solid carbon ball is prepared；
S11. glucose solution is prepared, then adds and hydro-thermal reaction is carried out in reaction kettle, natural cooling after having reacted, from
Then the heart is dried to pH to 7, dried product is calcined, obtain solid carbon ball；
S2. graphene is dissolved in deionized water, adds dispersant, ultrasonic disperse obtains graphene solution, then to stone
Zinc nitrate, ammonium hydroxide are sequentially added in black alkene solution, then the uniform stirring 2h under 90 DEG C of water-baths adds solid carbon ball, stirring is equal
It is transferred to after even in autoclave, hydro-thermal reaction is carried out at 90 DEG C, reaction time 6h, centrifuges and dry after having reacted；
S3. dried product is calcined, under nitrogen protection, under the conditions of 1 DEG C/min temperature programmings, 400 DEG C of guarantors
0.5h is held, then at 600 DEG C, 1h is kept, finally obtains the solid carbon ball negative electrode of lithium ion battery material of graphene/oxide coated by zinc
Material.
Wherein, the concentration of glucose solution described in step S11 is 0.04g/ml, and the temperature of the hydro-thermal reaction is
120 DEG C, reaction time 12h；
Dispersant described in step S2 is graphene quantum dot, and the addition of the graphene quantum dot is 1wt%；It is described
The mass ratio of zinc nitrate and ammonium hydroxide is 1:1；The amount ratio of the material of the graphene and zinc ion is 1：1；The graphene and reality
The mass ratio of heart carbon ball is 1:1.
Embodiment 2
The present embodiment provides a kind of solid carbon ball lithium ion battery negative material preparation method of graphene/oxide coated by zinc,
Comprise the following steps：
S1. solid carbon ball is prepared；
S11. glucose solution is prepared, then adds and hydro-thermal reaction is carried out in reaction kettle, natural cooling after having reacted, from
Then the heart is dried to pH to 7, dried product is calcined, obtain solid carbon ball；
S2. graphene is dissolved in deionized water, adds dispersant, ultrasonic disperse obtains graphene solution, then to stone
Zinc nitrate, ammonium hydroxide are sequentially added in black alkene solution, then the uniform stirring 4h under 90 DEG C of water-baths adds solid carbon ball, stirring is equal
It is transferred to after even in autoclave, hydro-thermal reaction is carried out at 110 DEG C, reaction time 16h, centrifuges and do after having reacted
It is dry；
S3. dried product is calcined, under nitrogen protection, under the conditions of 2 DEG C/min temperature programmings, 450 DEG C of guarantors
1h is held, then at 700 DEG C, 2h is kept, finally obtains the solid carbon ball negative electrode of lithium ion battery material of graphene/oxide coated by zinc
Material.
Wherein, the concentration of glucose solution described in step S11 is 0.12g/ml, and the temperature of the hydro-thermal reaction is
140 DEG C, reaction time 18h.
Dispersant described in step S2 is graphene quantum dot, and the addition of the graphene quantum dot is 3wt%；It is described
The mass ratio of zinc nitrate and ammonium hydroxide is 1.2:1；The amount ratio of the material of the graphene and zinc ion is 1：1~1.3；The graphite
Alkene and the mass ratio of solid carbon ball are 1:1.5.
Embodiment 3
The present embodiment provides a kind of solid carbon ball lithium ion battery negative material preparation method of graphene/oxide coated by zinc,
Comprise the following steps：
S1. solid carbon ball is prepared；
S11. glucose solution is prepared, then adds and hydro-thermal reaction is carried out in reaction kettle, natural cooling after having reacted, from
Then the heart is dried to pH to 7, dried product is calcined, obtain solid carbon ball；
S2. graphene is dissolved in deionized water, adds dispersant, ultrasonic disperse obtains graphene solution, then to stone
Zinc nitrate, ammonium hydroxide are sequentially added in black alkene solution, then the uniform stirring 6h under 90 DEG C of water-baths adds solid carbon ball, stirring is equal
It is transferred to after even in autoclave, hydro-thermal reaction is carried out at 120 DEG C, reaction time 24h, centrifuges and do after having reacted
It is dry；
S3. dried product is calcined, under nitrogen protection, under the conditions of 1~3 DEG C/min temperature programmings, 500 DEG C
1h is kept, then at 800 DEG C, 3h is kept, finally obtains the solid carbon ball negative electrode of lithium ion battery material of graphene/oxide coated by zinc
Material.
Wherein, the concentration of glucose solution described in step S11 is 0.20g/ml, and the temperature of the hydro-thermal reaction is
160 DEG C, reaction time 24h.
Dispersant described in step S2 is graphene quantum dot, and the addition of the graphene quantum dot is 5wt%；It is described
The mass ratio of zinc nitrate and ammonium hydroxide is 1.5:1；The amount ratio of the material of the graphene and zinc ion is 1：1.5；The graphene
Mass ratio with solid carbon ball is 1:2.
4~embodiment of embodiment 6
The present embodiment provides a kind of solid carbon ball lithium-ion negative pole electrode piece preparation method of graphene/oxide coated by zinc, bag
Include following steps：
S4. the solid carbon ball lithium ion battery negative material of graphene/oxide coated by zinc embodiment 1~3 being prepared
As negative active core-shell material, with adhesive PVDF Kynoar using mass ratio as 95:50 are ground, milling time for 30~
50s；
S5. and then 70wt%NMP solvents are added, continues to be ground to uniformly thick, obtain slurry；
S6. step S5 is obtained slurry to be evenly coated in copper foil, using vacuum drying, temperature is 60~80 DEG C, during constant temperature
Between 12h~24h, remove electrode slice in NMP obtain electrode slice；
S7., electrode slice in step S6 is washed into the former piece of a diameter of 16mm, graphene/solid carbon ball lithium ion is obtained and bears
Pole electrode slice.
7~embodiment of embodiment 9
The present embodiment provides a kind of preparation method of fastening lithium ionic cell, comprise the following steps：
S1. battery assembling is carried out as raw material using the negative electricity pole piece that 4~embodiment of embodiment 6 is prepared；
S2. cell assembling processes are carried out in the glove box of closed argon atmosphere, and oxygen content is in the glove box
0.01~5ppm, water content are 0.01~5ppm；
S3. by 2025 anode covers → negative electricity pole piece → polypropylene diaphragm → lithium piece → stainless steel gasket → spring leaf →
The order of 2025 negative electrode casings from bottom to top is put well successively, and electrolyte lithium hexafluoro phosphate is added dropwise, seals, be assembled into 2025 type buttons electricity
Pond, fastening lithium ionic cell is obtained after activation.
Performance test and characterization：The fastening lithium ionic cell that 7~embodiment of embodiment 9 is prepared carries out electric property
Test, when discharge current is maintained at 200mA/g, battery first discharge specific capacity is up to 1223~1258mAh/g.By 100
After a high current density circulation (maximum current density reaches 10A/g), battery remains to the higher charge/discharge capacity of holding and cyclicity
It can stablize, its Average specific capacities is about 421~467mAh/g.
Claims (10)
- A kind of 1. solid carbon ball lithium ion battery negative material preparation method of graphene/oxide coated by zinc, it is characterised in that including Following steps：S1. solid carbon ball is prepared；S11. glucose solution is prepared, then adds and hydro-thermal reaction is carried out in reaction kettle, natural cooling after having reacted, centrifugation is extremely PH to 7, is then dried, and dried product is calcined, and obtains solid carbon ball；S2. graphene is dissolved in deionized water, adds dispersant, ultrasonic disperse obtains graphene solution, then to graphene Zinc nitrate, ammonium hydroxide are sequentially added in solution, 2~6h of uniform stirring under 90 DEG C of water-baths, then adds solid carbon ball, stir evenly After be transferred in autoclave, hydro-thermal reaction is carried out at 90~120 DEG C, the reaction time is 6~24h, reacted after centrifugation It is and dry；S3. dried product is calcined, under nitrogen protection, under the conditions of 1~3 DEG C/min temperature programmings, 400~500 DEG C keep 0.5~1h, then at 600~800 DEG C, keep 1~3h, finally obtain the solid carbon ball of graphene/oxide coated by zinc Lithium ion battery negative material.
- 2. the solid carbon ball lithium ion battery negative material preparation method of graphene/oxide coated by zinc according to claim 1, its It is characterized in that, the concentration of glucose solution described in step S11 is 0.04~0.20g/ml.
- 3. the solid carbon ball lithium ion battery negative material preparation method of graphene/oxide coated by zinc according to claim 1, its It is characterized in that, the temperature of hydro-thermal reaction described in step S11 is 120~160 DEG C, and the reaction time is 12~24h.
- 4. the solid carbon ball lithium ion battery negative material preparation method of graphene/oxide coated by zinc according to claim 1, its It is characterized in that, dispersant described in step S2 is graphene quantum dot.
- 5. the solid carbon ball lithium ion battery negative material preparation method of graphene/oxide coated by zinc according to claim 1, its It is characterized in that, the addition of the graphene quantum dot is 1~5wt%.
- 6. the solid carbon ball lithium ion battery negative material preparation method of graphene/oxide coated by zinc according to claim 1, its It is characterized in that, the mass ratio of zinc nitrate and ammonium hydroxide described in step S2 is 1~1.5:1.
- 7. the solid carbon ball lithium ion battery negative material preparation method of graphene/oxide coated by zinc according to claim 1, its It is characterized in that, the amount ratio of the material of graphene and zinc ion described in step S2 is 1：1~1.5.
- 8. the solid carbon ball lithium ion battery negative material preparation method of graphene/oxide coated by zinc according to claim 1, its It is characterized in that, the mass ratio of graphene described in step S2 and solid carbon ball is 1:1~2.
- 9. a kind of solid carbon ball lithium ion battery negative material of graphene/oxide coated by zinc, it is characterised in that by claim 1 The solid carbon ball lithium ion battery negative material of graphene/oxide coated by zinc described in~8 any one is prepared.
- 10. the application of the solid carbon ball lithium ion battery negative material of graphene/oxide coated by zinc according to claim 9, its It is characterized in that, applied to lithium ion battery negative material.
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Cited By (4)
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| CN109935802A (en) * | 2018-11-28 | 2019-06-25 | 万向一二三股份公司 | A kind of lithium iron phosphate positive material |
| CN110416552A (en) * | 2019-07-05 | 2019-11-05 | 江苏科技大学 | A kind of micro-nano structure phosphide/oxide/graphene composite material preparation method and applications |
| CN113060756A (en) * | 2021-04-28 | 2021-07-02 | 中科院过程工程研究所南京绿色制造产业创新研究院 | Graphene-zinc oxide three-dimensional porous composite material and preparation method and application thereof |
| CN115084517A (en) * | 2021-08-16 | 2022-09-20 | 广州倬粤新材料科技研究有限公司 | Electrode plate material of graphene nickel-zinc battery and preparation method thereof |
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| CN115084517A (en) * | 2021-08-16 | 2022-09-20 | 广州倬粤新材料科技研究有限公司 | Electrode plate material of graphene nickel-zinc battery and preparation method thereof |
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