CN207303231U - A kind of graphene lithium-ion negative pole pole piece - Google Patents
A kind of graphene lithium-ion negative pole pole piece Download PDFInfo
- Publication number
- CN207303231U CN207303231U CN201721025832.4U CN201721025832U CN207303231U CN 207303231 U CN207303231 U CN 207303231U CN 201721025832 U CN201721025832 U CN 201721025832U CN 207303231 U CN207303231 U CN 207303231U
- Authority
- CN
- China
- Prior art keywords
- negative
- pole piece
- projection portion
- collector
- ion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 31
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 229910021389 graphene Inorganic materials 0.000 title claims abstract description 29
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 29
- 239000006183 anode active material Substances 0.000 claims abstract description 13
- 239000007773 negative electrode material Substances 0.000 claims abstract description 4
- 239000011866 silicon-based anode active material Substances 0.000 claims abstract description 4
- 239000011258 core-shell material Substances 0.000 claims description 16
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 3
- 239000005030 aluminium foil Substances 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 6
- 239000002800 charge carrier Substances 0.000 abstract description 3
- 230000008602 contraction Effects 0.000 abstract description 2
- 239000002210 silicon-based material Substances 0.000 abstract description 2
- 239000007784 solid electrolyte Substances 0.000 abstract description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 230000002687 intercalation Effects 0.000 description 2
- 238000009830 intercalation Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 150000001336 alkenes Chemical class 0.000 description 1
- 239000010405 anode material Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 239000010406 cathode material Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The utility model discloses a kind of graphene lithium-ion negative pole pole piece, cathode pole piece includes negative current collector and coated in the anode active material layer on negative current collector, the anode active material layer is silicon-based anode active material, negative current collector and anode active material layer are all provided with being set to the concaveconvex structure being mutually matched, and the outside of the negative electrode material layer also coats a layer graphene layer；The cathode pole piece of the utility model has higher specific capacity, expansion and contraction of the silicon materials in charge and discharge process can effectively be alleviated, a layer graphene layer is coated on negative material, with higher charge carrier mobility, the electrical conductivity of whole anode can be improved, realize the quick discharge and recharge of battery, and it can prevent the increase of the thickness of the solid electrolyte interface film (SEI) in charge and discharge process on negative material surface, prevent the reduction of charge/discharge capacity, improve the cycle performance of battery.
Description
Technical field
Field of batteries is the utility model is related to, is related to a kind of graphene lithium-ion negative pole pole piece.
Background technology
The research of China's power-type lithium ion battery is in the high speed development stage.Lithium ion battery is from small-sized electronic product
Application field turns to powerful power lithium battery field, while proposes new requirement to the negative material of lithium ion battery.It is negative
Important component of the pole material as lithium ion battery, largely affects the overall performance of lithium ion battery.Mesh
Before, commercialized lithium ion battery negative material is usually that graphitized carbon material specific capacity is low, and high-rate charge-discharge capability is poor
And there are security risk, it can not meet more height ratio capacity and security requirement.Therefore, develop specific capacity height, good cycle,
The excellent novel cathode material for lithium ion battery of charge-discharge performance become there is an urgent need to.The intercalation potential of silicon is low, and at present
Specific capacity highest (4200mAh.g in the material known-1), much larger than the theoretical capacity of graphite；At the same time silicon compared with graphite as anode more
To be safe and reliable, so widely being studied in the range of in the industry cycle.
Although the capacity of silicon will be higher by as many as ten times of carbon, due to huge bulk effect cause silicon based anode material it is de-/
Capacity rapid decay in process of intercalation, electrode cycle performance decline rapidly, greatly hinder its commercialized process.
Graphene has higher charge carrier mobility, super good heat endurance and electrical conductivity, superelevation at room temperature
Young's modulus, the theoretical specific surface area of super large.Since graphene has unique performance, in energy storage and conversion art stone
Black alkene material has larger use potentiality.But how graphene is applied in lithium battery, it is that the technology for needing to solve is asked
Topic.
Utility model content
The purpose of the utility model is to overcome the defects of the prior art, there is provided a kind of graphene lithium-ion negative pole pole piece,
What the technical solution of the graphene lithium-ion negative pole pole piece was realized in：
A kind of graphene lithium-ion negative pole pole piece, the cathode pole piece include negative current collector and coated in negative pole currect collectings
Anode active material layer on body, the anode active material layer are silicon-based anode active material, and the negative current collector includes
Collector horizontal component and the collector projection portion vertical with horizontal component, the anode active material layer include and anode collection
The substantially parallel common portion in fluid levels part and perpendicular with common portion and be mutually matched with collector projection portion
Projection portion, the collector projection portion and negative active core-shell material projection portion are spaced to be uniformly arranged, institute
The outside for stating negative electrode material layer projection portion and common portion also coats a layer graphene layer.
Preferably, the shape of the collector projection portion and negative active core-shell material projection portion can be taper, cylinder
Shape or prismatic one kind.
It is further preferred that the collector projection portion and negative active core-shell material projection portion are cylindrical and described
The edge of cylinder is smooth setting.
Preferably, the height of the collector projection portion and negative active core-shell material projection portion is 150~350nm.
Preferably, the spacing between the collector projection portion and negative active core-shell material projection portion for 350~
450nm。
Preferably, the negative current collector is aluminium foil or nickel foil.
Further, the cathode pole piece can make bipolar chip architecture, i.e., the structure of described negative current collector both sides is
It is arranged symmetrically.
Further, the cathode pole piece is suitable for the lithium ion battery of stacked structure or winding-structure.
The cathode pole piece of the utility model has higher specific capacity, and collector is arranged to concaveconvex structure, is not only able to
Increase its specific surface area, additionally it is possible to increase its current collection effect, anode active material layer is arranged to concaveconvex structure, can effectively delay
Expansion and contraction of the silicon materials in charge and discharge process are solved, while a layer graphene layer is coated on negative material, is had higher
Charge carrier mobility, it is possible to increase the electrical conductivity of whole anode, realizes the quick discharge and recharge of battery, and can prevent from filling
The increase of the thickness of solid electrolyte interface film (SEI) in discharge process on negative material surface, prevents charge/discharge capacity
Reduce, improve the cycle performance of battery.
Brief description of the drawings
Fig. 1 is the structure diagram of the utility model graphene lithium-ion negative pole pole piece；
Fig. 2 is the structure diagram of an another embodiment for the utility model graphene lithium-ion negative pole pole piece.
Reference numeral：1- negative current collectors, 11- collector horizontal components, 12- collector projection portions, 2- negative electrode actives
Material layer, 21- common portions, 22- negative active core-shell material projection portions, 3- graphene layers.
Embodiment
The utility model is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
As shown in Figure 1, a kind of graphene lithium-ion negative pole pole piece, the cathode pole piece includes negative current collector 1 and applies
The anode active material layer 2 on negative current collector 1 is overlayed on, the anode active material layer 2 is silicon-based anode active material, described
Negative current collector 1 includes collector horizontal component 11 and the collector projection portion 12 vertical with horizontal component 11, the anode
Active material layer 2 includes the common portion 21 substantially parallel with negative current collector horizontal component 11 and hangs down with 21 phase of common portion
Projection portion 22 that is straight and being mutually matched with collector projection portion 12, the collector projection portion 12 and negative active core-shell material
Projection portion 22 is spaced to be uniformly arranged, and the outside of the negative electrode material layer projection portion 22 and common portion 21 is also
Coat a layer graphene layer 3.
When it is implemented, the shape of the collector projection portion 12 and negative active core-shell material projection portion 22 can be cone
Shape, cylinder or prismatic one kind.
Preferably, the collector projection portion 12 and negative active core-shell material projection portion 22 are cylinder and the circle
The edge of cylindricality is smooth setting.
When it is implemented, the height of the collector projection portion 12 and negative active core-shell material projection portion 22 be 150~
350nm。
When it is implemented, the spacing between the collector projection portion 12 and negative active core-shell material projection portion 22 is
350~450nm.
Preferably, the negative current collector 1 is aluminium foil or nickel foil.
Another embodiment of this graphene lithium-ion negative pole pole piece, as shown in Fig. 2, the cathode pole piece can do it is in pairs
Pole piece structure, i.e., the structure of described 1 both sides of negative current collector are arranged symmetrically.
Further, the cathode pole piece is suitable for the lithium ion battery of stacked structure or winding-structure.
The technology contents and technical characteristic of the utility model have revealed that as above those skilled in the art still may base
The replacement and modification without departing substantially from the utility model in essence are made in the teaching of the utility model, therefore, the utility model protection
Scope is not limited to the revealed content of embodiment, also including various replacements and modification without departing substantially from the utility model in essence.
Claims (8)
- A kind of 1. graphene lithium-ion negative pole pole piece, it is characterised in that：The cathode pole piece includes negative current collector and coating Anode active material layer on negative current collector, the anode active material layer are silicon-based anode active material, the anode Collector includes collector horizontal component and the collector projection portion vertical with horizontal component, the anode active material layer bag Include with the common portion of negative current collector horizontal portions parallel and it is perpendicular with common portion and with collector lug boss split-phase Mutual matched projection portion, the collector projection portion and negative active core-shell material projection portion are spaced are uniformly arranged , the outside of the negative electrode material layer projection portion and common portion also coats a layer graphene layer.
- 2. graphene lithium-ion negative pole pole piece according to claim 1, it is characterised in that：The collector projection portion and The shape of negative active core-shell material projection portion can be taper, cylinder or prismatic one kind.
- 3. graphene lithium-ion negative pole pole piece according to claim 2, it is characterised in that：The collector projection portion and Negative active core-shell material projection portion is that cylindrical and described cylindrical edge is smooth setting.
- 4. graphene lithium-ion negative pole pole piece according to claim 1, it is characterised in that：The collector projection portion and The height of negative active core-shell material projection portion is 150~350nm.
- 5. graphene lithium-ion negative pole pole piece according to claim 1, it is characterised in that：The collector projection portion and Spacing between negative active core-shell material projection portion is 350~450nm.
- 6. graphene lithium-ion negative pole pole piece according to claim 1, it is characterised in that：The negative current collector is aluminium foil Or nickel foil.
- 7. graphene lithium-ion negative pole pole piece according to claim 1, it is characterised in that：The cathode pole piece can be made Bipolar chip architecture, i.e., the structure of described negative current collector both sides are arranged symmetrically.
- 8. graphene lithium-ion negative pole pole piece according to claim 7, it is characterised in that：The cathode pole piece is suitable for heap The lithium ion battery of stack structure or winding-structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721025832.4U CN207303231U (en) | 2017-08-16 | 2017-08-16 | A kind of graphene lithium-ion negative pole pole piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721025832.4U CN207303231U (en) | 2017-08-16 | 2017-08-16 | A kind of graphene lithium-ion negative pole pole piece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207303231U true CN207303231U (en) | 2018-05-01 |
Family
ID=62444420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721025832.4U Expired - Fee Related CN207303231U (en) | 2017-08-16 | 2017-08-16 | A kind of graphene lithium-ion negative pole pole piece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207303231U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110085806A (en) * | 2019-04-30 | 2019-08-02 | 湖北锂诺新能源科技有限公司 | Silicon-carbon cathode and preparation method thereof and lithium ion battery |
| EP3576196A1 (en) * | 2018-05-31 | 2019-12-04 | Panasonic Intellectual Property Management Co., Ltd. | Lithium secondary battery |
| CN112768776A (en) * | 2019-10-21 | 2021-05-07 | 鹏鼎控股(深圳)股份有限公司 | Flexible battery assembly and method of manufacturing the same |
| WO2023221606A1 (en) * | 2022-05-20 | 2023-11-23 | 宁德时代新能源科技股份有限公司 | Current collector, electrode sheet, electrode assembly, battery cell, battery and electric apparatus |
-
2017
- 2017-08-16 CN CN201721025832.4U patent/CN207303231U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3576196A1 (en) * | 2018-05-31 | 2019-12-04 | Panasonic Intellectual Property Management Co., Ltd. | Lithium secondary battery |
| CN110556540A (en) * | 2018-05-31 | 2019-12-10 | 松下知识产权经营株式会社 | Lithium secondary battery |
| US10923711B2 (en) | 2018-05-31 | 2021-02-16 | Panasonic Intellectual Property Management Co., Ltd. | Lithium secondary battery including nonaqueous electrolyte having lithium-ion conductivity |
| CN110085806A (en) * | 2019-04-30 | 2019-08-02 | 湖北锂诺新能源科技有限公司 | Silicon-carbon cathode and preparation method thereof and lithium ion battery |
| CN112768776A (en) * | 2019-10-21 | 2021-05-07 | 鹏鼎控股(深圳)股份有限公司 | Flexible battery assembly and method of manufacturing the same |
| CN112768776B (en) * | 2019-10-21 | 2022-06-24 | 鹏鼎控股(深圳)股份有限公司 | Flexible battery assembly and method of manufacturing the same |
| WO2023221606A1 (en) * | 2022-05-20 | 2023-11-23 | 宁德时代新能源科技股份有限公司 | Current collector, electrode sheet, electrode assembly, battery cell, battery and electric apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180501 Termination date: 20180816 |