CN203150652U - Lithium ion battery negative electrode pole piece - Google Patents
Lithium ion battery negative electrode pole piece Download PDFInfo
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- CN203150652U CN203150652U CN2012207475987U CN201220747598U CN203150652U CN 203150652 U CN203150652 U CN 203150652U CN 2012207475987 U CN2012207475987 U CN 2012207475987U CN 201220747598 U CN201220747598 U CN 201220747598U CN 203150652 U CN203150652 U CN 203150652U
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- negative electrode
- lithium ion
- negative pole
- ion battery
- pole piece
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- 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
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Abstract
The utility model relates to a lithium ion battery negative electrode pole piece which comprises a current collector, a pole ear and negative electrode material layers, wherein the pole ear is connected with the current collector; the negative electrode material layers are coated on the surface of the current collector; the negative electrode material layers comprise negative electrode inner coatings coated on the surface of the current collector and negative electrode outer coatings coated on the surfaces of the negative electrode inner coatings. According to the utility model, the negative electrode inner coatings are coated on the surface of the current collector, and the negative electrode outer coatings are coated on the surfaces of the negative electrode inner coatings; a dual-layer active layer is formed on the surface of the current collector; the lithium ion battery negative electrode pole piece structure can effectively prevent deposition of excessive Li<+> on the negative electrode and the formation of lithium dendrites during the electric charge process; during the electric charge process, a great quantity of Li<+> pulled away from the positive electrode during the electric charge process are embedded in or on the surfaces of the negative electrode inner coatings, and the residual less Li<+> are combined with the negative electrode outer coating at the upper layer, so that metal lithium can be effectively prevented from being separated out; the automatic electric discharge rate of the lithium ion battery can be lowered effectively; the electricity quantity hold capability of the lithium battery is improved; and meanwhile, the safety performance of the lithium ion battery is improved.
Description
Technical field
The utility model belongs to technical field of lithium batteries, is specifically related to a kind of lithium ion battery negative pole piece.
Background technology
Cathode pole piece is the important composition parts of lithium ion battery, when lithium ion battery is made, by at cathode pole piece surface-coated negative material as lithium ion battery negative.During charging, the electromotive force at lithium ion battery the two poles of the earth forces and disengages lithium ion in the positive electrode and be embedded in the negative material; During discharge, lithium ion is then separated out from negative material again and is combined with positive electrode, mobile the produce electric current of lithium ion between positive and negative pole material.Though cathode pole piece can not determine the capacity of lithium ion battery, but the structure of cathode pole piece can influence the ability that negative pole holds lithium ion, simultaneously the cathode pole piece structural design need consider to prevent that lithium metal from separating out to avoid occurring internal short-circuit and prevent the unnecessary lithium ion of charging process in the negative pole deposition and form Li dendrite, so cathode pole piece is bigger to the security performance influence of lithium ion battery.In addition, because the cathode pole piece structure is different relevant with the binding ability of lithium ion and negative material, influences the self-discharge rate of lithium ion battery, and then influence the electric weight hold facility of lithium ion battery.Therefore, the cathode pole piece structural design whether rationally remote-effects the performance of lithium ion battery.Existing cathode pole piece is many to be made of collector, the lug that is connected with collector and the negative electrode material layer that is coated in collection liquid surface.The cathode pole piece of this kind structure is because only there being the individual layer active material layer, negative pole holds the limited in one's ability of lithium ion, be unfavorable for preventing that lithium metal from separating out and prevent the unnecessary lithium ion of charging process in negative pole deposition and form Li dendrite, thereby be difficult to effectively improve the security performance of lithium ion battery.And the individual layer active material layer has limited the binding ability of lithium ion and negative material, can't effectively reduce the self-discharge rate of lithium ion battery, and the electric weight hold facility of lithium ion battery is reduced.
Summary of the invention
Based on this, the purpose of this utility model is to provide a kind of lithium metal that can effectively prevent to separate out and prevent the unnecessary lithium ion of charging process in the negative pole deposition and form the lithium ion battery negative pole piece of Li dendrite.
Above-mentioned purpose of the present utility model is achieved by following scheme:
A kind of lithium ion battery negative pole piece, comprise collector, the lug that is connected with collector and be coated in the negative electrode material layer of collection liquid surface that described negative electrode material layer comprises the negative pole undercoating that is coated in collection liquid surface and is coated in the negative pole external coating on negative pole undercoating surface.
Lithium ion battery negative pole piece of the present utility model passes through to apply the negative pole undercoating at collection liquid surface, and at negative pole undercoating surface-coated negative pole external coating.Form the double-layer active layer at collection liquid surface.This lithium ion battery negative pole piece structure with double-layer active layer can effectively prevent the Li that charging process is unnecessary
+In negative pole deposition and form Li dendrite, and a large amount of Li of deviating from from positive pole of charging process
+It is inner or surperficial to be embedded into the negative pole undercoating, remaining a small amount of Li
+Be combined with the negative pole external coating on upper strata, so this lithium ion battery negative pole piece can prevent effectively that lithium metal from separating out, effectively reduce the self-discharge rate of lithium ion battery, improve the electric weight hold facility of lithium ion battery, improve the security performance of lithium ion battery simultaneously.
Above-mentioned lug is nickel matter sheet metal.
Described nickel matter sheet metal and the welding of described collector.
Above-mentioned collector is preferably Copper Foil.
Above-mentioned negative pole undercoating, negative pole external coating be can be reversible the layer of nitride material in conjunction with lithium ion and lithium metal, PAS material layer, tin-based oxide material layer, tinbase combined oxidation material layer, tin alloy material layer, carbon materials layer or nanometer negative electrode material layer in a kind of, for example native graphite layer, Delanium layer, carbon fiber layer, carbonaceous mesophase spherules layer, soft carbon-coating or hard carbon layer.Preferably, a kind of in the tin-based oxide material layer that slips into and deviate from lithium ion and lithium metal, tin alloy material layer or the nanometer negative electrode material layer that can be reversible of negative pole external coating.Wherein the tin-based oxide material layer can be and comprises a kind of in stannous oxide layer, stannic oxide layer and both composite oxide layers.Tinbase combined oxidation material layer can be SnO-P
2O
5Layer or ZnO-SnO
2Layer.
As further preferred, the preferred graphite material layer of negative pole external coating, the preferred carbon nano-tube material layer of negative pole undercoating.
The utility model compared with prior art has following beneficial effect:
Lithium ion battery negative pole piece of the present utility model passes through to apply the negative pole undercoating at collection liquid surface, and at negative pole undercoating surface-coated negative pole external coating.Form the double-layer active layer at collection liquid surface.This lithium ion battery negative pole piece structure with double-layer active layer can effectively prevent the Li that charging process is unnecessary
+In negative pole deposition and form Li dendrite, and a large amount of Li of deviating from from positive pole of charging process
+It is inner or surperficial to be embedded into the negative pole undercoating, remaining a small amount of Li
+Be combined with the negative pole external coating on upper strata, so this lithium ion battery negative pole piece can prevent effectively that lithium metal from separating out, effectively reduce the self-discharge rate of lithium ion battery, improve the electric weight hold facility of lithium ion battery, improve the security performance of lithium ion battery simultaneously.
Description of drawings
Fig. 1 is the lithium ion battery negative pole piece structural representation of the utility model embodiment 1.
Embodiment
With reference to Fig. 1, a kind of lithium ion battery negative pole piece, the lug 2 that comprise collector 1, is connected with collector and the negative electrode material layer that is coated in collection liquid surface, described negative electrode material layer comprise the negative pole undercoating 31 that is coated in collection liquid surface and the negative pole external coating 32 that is coated in negative pole undercoating surface.
In the present embodiment, above-mentioned lug is nickel matter sheet metal, nickel matter sheet metal and the welding of described collector.
In the present embodiment, above-mentioned collector is preferably Copper Foil.
In the present embodiment, the negative pole external coating is the graphite material layer, and the negative pole undercoating is the carbon nano-tube material layer.
The lithium ion battery negative pole piece of present embodiment passes through at collection liquid surface carbon nano-tube coating material layer, and applies the graphite material layer at the carbon nano-tube material laminar surface.Form the double-layer active layer at collection liquid surface.This lithium ion battery negative pole piece structure with double-layer active layer can effectively prevent the Li that charging process is unnecessary
+In negative pole deposition and form Li dendrite, and a large amount of Li of deviating from from positive pole of charging process
+It is inner or surperficial to be embedded into the carbon nano-tube material layer, remaining a small amount of Li
+Be combined with the graphite material layer on upper strata, so this lithium ion battery negative pole piece can prevent effectively that lithium metal from separating out, effectively reduce the self-discharge rate of lithium ion battery, improve the electric weight hold facility of lithium ion battery, improve the security performance of lithium ion battery simultaneously.
A kind of lithium ion battery negative pole piece, comprise collector, the lug that is connected with collector and be coated in the negative electrode material layer of collection liquid surface that described negative electrode material layer comprises the negative pole undercoating that is coated in collection liquid surface and is coated in the negative pole external coating on negative pole undercoating surface.
In the present embodiment, above-mentioned lug is nickel matter sheet metal, nickel matter sheet metal and the welding of described collector.
In the present embodiment, above-mentioned collector is preferably Copper Foil.
In the present embodiment, the negative pole external coating is the tin-based oxide material layer, and in the present embodiment, the tin-based oxide material layer is the stannous oxide layer, and the negative pole undercoating is layer of nitride material.
The lithium ion battery negative pole piece of present embodiment passes through at collection liquid surface nitride coating material layer, and at layer of nitride material surface-coated tin-based oxide material layer.Form the double-layer active layer at collection liquid surface.This lithium ion battery negative pole piece structure with double-layer active layer can effectively prevent the Li that charging process is unnecessary
+In negative pole deposition and form Li dendrite, and a large amount of Li of deviating from from positive pole of charging process
+It is inner or surperficial to be embedded into layer of nitride material, remaining a small amount of Li
+Be combined with the tin-based oxide material layer on upper strata, therefore this lithium ion battery negative pole piece can prevent effectively that lithium metal from separating out, effectively reduce the self-discharge rate of lithium ion battery, the electric weight hold facility of lithium ion battery is reduced, improve the security performance of lithium ion battery simultaneously.
Embodiment 3
A kind of lithium ion battery negative pole piece, comprise collector, the lug that is connected with collector and be coated in the negative electrode material layer of collection liquid surface that described negative electrode material layer comprises the negative pole undercoating that is coated in collection liquid surface and is coated in the negative pole external coating on negative pole undercoating surface.
In the present embodiment, above-mentioned lug is nickel matter sheet metal, nickel matter sheet metal and the welding of described collector.
In the present embodiment, above-mentioned collector is preferably Copper Foil.
In the present embodiment, the negative pole external coating is the graphite material layer, and the negative pole undercoating is the carbonaceous mesophase spherules layer.
The lithium ion battery negative pole piece of present embodiment passes through to apply the PAS material layer at collection liquid surface, and at PAS material surface coated with nano negative electrode material layer.Form the double-layer active layer at collection liquid surface.This lithium ion battery negative pole piece structure with double-layer active layer can effectively prevent the Li that charging process is unnecessary
+In negative pole deposition and form Li dendrite, and a large amount of Li of deviating from from positive pole of charging process
+It is inner or surperficial to be embedded into the PAS material layer, remaining a small amount of Li
+Be combined with the nanometer negative electrode material layer on upper strata, therefore this lithium ion battery negative pole piece can prevent effectively that lithium metal from separating out, effectively reduce the self-discharge rate of lithium ion battery, improve the electric weight hold facility of lithium ion battery, improve the security performance of lithium ion battery simultaneously.
Above-described embodiment is the utility model preferred implementation; but execution mode of the present utility model is not restricted to the described embodiments; other any do not deviate from change, the modification done under spiritual essence of the present invention and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within the protection range of the present utility model.
Claims (6)
1. lithium ion battery negative pole piece, comprise collector, the lug that is connected with collector and be coated in the negative electrode material layer of collection liquid surface, it is characterized in that: described negative electrode material layer comprises the negative pole undercoating that is coated in collection liquid surface and is coated in the negative pole external coating on negative pole undercoating surface.
2. lithium ion battery negative pole piece according to claim 1, it is characterized in that: described lug is nickel matter sheet metal.
3. lithium ion battery negative pole piece according to claim 2 is characterized in that: described nickel matter sheet metal and the welding of described collector.
4. lithium ion battery negative pole piece according to claim 1, it is characterized in that: described collector is Copper Foil.
5. lithium ion battery negative pole piece according to claim 1 is characterized in that: a kind of in the layer of nitride material in conjunction with lithium ion and lithium metal, PAS material layer, tin-based oxide material layer, tin alloy material layer, carbon materials layer or the nanometer negative electrode material layer that can be reversible of described negative pole undercoating, negative pole external coating.
6. lithium ion battery negative pole piece according to claim 1, it is characterized in that: described negative pole external coating is the graphite material layer, described negative pole undercoating is the carbon nano-tube material layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012207475987U CN203150652U (en) | 2012-12-29 | 2012-12-29 | Lithium ion battery negative electrode pole piece |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012207475987U CN203150652U (en) | 2012-12-29 | 2012-12-29 | Lithium ion battery negative electrode pole piece |
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| CN203150652U true CN203150652U (en) | 2013-08-21 |
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| CN2012207475987U Expired - Lifetime CN203150652U (en) | 2012-12-29 | 2012-12-29 | Lithium ion battery negative electrode pole piece |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105609729A (en) * | 2015-12-30 | 2016-05-25 | 湖南永盛新材料股份有限公司 | Aluminum/copper/CNTs-tin/graphite multilayer-structured lithium ion battery negative electrode material and preparation method therefor |
| CN110120500A (en) * | 2018-02-05 | 2019-08-13 | 丰田自动车株式会社 | The manufacturing method of metal secondary batteries cathode, metal secondary batteries and metal secondary batteries |
| CN112331814A (en) * | 2020-09-29 | 2021-02-05 | 广东维都利新能源有限公司 | Lithium ion battery negative plate and preparation method thereof |
| CN113036074A (en) * | 2019-12-09 | 2021-06-25 | 北京小米移动软件有限公司 | Battery cathode, processing method thereof and battery |
| CN114008814A (en) * | 2019-06-21 | 2022-02-01 | 谷歌有限责任公司 | Composite lithium metal anode for increased energy density and reduced charge time |
-
2012
- 2012-12-29 CN CN2012207475987U patent/CN203150652U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105609729A (en) * | 2015-12-30 | 2016-05-25 | 湖南永盛新材料股份有限公司 | Aluminum/copper/CNTs-tin/graphite multilayer-structured lithium ion battery negative electrode material and preparation method therefor |
| CN105609729B (en) * | 2015-12-30 | 2018-02-13 | 湖南永盛新材料股份有限公司 | A kind of aluminium/copper/CNTs tin/graphite sandwich construction lithium ion battery negative material and preparation method thereof |
| CN110120500A (en) * | 2018-02-05 | 2019-08-13 | 丰田自动车株式会社 | The manufacturing method of metal secondary batteries cathode, metal secondary batteries and metal secondary batteries |
| CN110120500B (en) * | 2018-02-05 | 2022-04-15 | 丰田自动车株式会社 | Negative electrode for metal secondary battery, and method for manufacturing metal secondary battery |
| CN114008814A (en) * | 2019-06-21 | 2022-02-01 | 谷歌有限责任公司 | Composite lithium metal anode for increased energy density and reduced charge time |
| CN113036074A (en) * | 2019-12-09 | 2021-06-25 | 北京小米移动软件有限公司 | Battery cathode, processing method thereof and battery |
| CN113036074B (en) * | 2019-12-09 | 2022-11-18 | 北京小米移动软件有限公司 | Battery cathode, processing method thereof and battery |
| CN112331814A (en) * | 2020-09-29 | 2021-02-05 | 广东维都利新能源有限公司 | Lithium ion battery negative plate and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130821 |