CN101465416A - High specific capacity composite electrode pole piece for lithium ion battery - Google Patents
High specific capacity composite electrode pole piece for lithium ion battery Download PDFInfo
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- CN101465416A CN101465416A CNA2008101909514A CN200810190951A CN101465416A CN 101465416 A CN101465416 A CN 101465416A CN A2008101909514 A CNA2008101909514 A CN A2008101909514A CN 200810190951 A CN200810190951 A CN 200810190951A CN 101465416 A CN101465416 A CN 101465416A
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- pole piece
- negative pole
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- lithium ion
- composite negative
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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
Abstract
The invention relates to a height-ratio capacity composite electrode pole piece for lithium ion batteries, being composed of a current collector, a high-capacity composite anode material and an electrode ear; the current collector is composed of conducting materials with a three-dimensional net structure; the high-capacity composite anode material is composed of a composite anode material enhanced body and a composite anode material basal body, the composite anode material enhanced body is highly dispersed in the composite anode material basal body; the high-capacity composite anode material is uniformly filled in a hole of the current collector by a high-temperature solid-phase reaction and is combined with the framework of the current collector by an interface for forming a composite electrode body with lithium-embedding activity; the electrode ear is welded at one end of the current collector and is connected with an external circuit for forming current path. The height-ratio capacity composite electrode pole piece has the beneficial effects that: compared with the traditional pole pieces in the lithium ion batteries, the pole piece of the invention does not adopt commonly-used electric conducting agents and caking agents, and the pole piece with good dispersivity high adhesion and is formed by the high-temperature solid-phase action between the active composite electrode material and the current collector; the pole piece has the advantages of low cost, easy forming and the like.
Description
Technical field
The invention belongs to the lithium ion battery field, relate to high specific capacity composite electrode pole piece for lithium ion battery.Be can be used as lithium ion battery negative have height ratio capacity, charge and discharge process invertibity height, a composite electrode pole piece that cycle performance is good.
Technical background
Along with the miniaturization of various portable electric appts and to the widespread demand of electric automobile, demand and performance requirement sharp increase to chemical power source, and at present for restriction such as the graphite of the lithium transition-metal oxide/graphite system that adopts mostly in the commercialization lithium ion battery owing to the lower theoretical lithium storage content of this system electrode itself, 372mAh/g has been difficult to adapt to now the demand to the power supply with high-energy-density density.Studies show that non-carbon negative pole material of present report, many materials with high storage lithium performance, as Al, Sn, Sb, Si etc. can with Li alloyed metal (AM) and alloy type material thereof, the amount of its reversible lithium storage is far longer than graphite-like negative pole D.Fauteux and R.Koksbang, J.Appl.Electrochem.Soc, 1993,23:1-6 high power capacity problem no longer is a predicament of limiting lithium ion cell negative material, but these novel high-capacity material are taken off at lithium and are all had serious bulk effect in the embedding process, this is to cause the cyclical stability of material poor, limits the key factor of its practicability.Be present lithium ion battery negative material exploitation, electrode preparation and matter of utmost importance that application faced how realizing on the basis of high power capacity negative material known today that negative material keeps improving under the situation of appropriate high power capacity its cyclical stability.
For being the high power capacity negative material of representative with silicon, tin and alloy thereof or compound, can electrically contact problem in the removal lithium embedded process loses activity the part material, this be since the material of high power capacity this also exist serious volumetric expansion and to shrink this bulk effect particularly outstanding in circulation first in the removal lithium embedded process, cause it in follow-up cyclic process, to lose electrical contact performance, thereby the part active material lose electro-chemical activity.In addition, because silicon materials itself belong to semiconductor, metallic tin and alloy thereof then behind doff lithium lithium first because the structural transformation of itself and make active particle itself lose continuous electron propagation ducts each other with the acting in conjunction of electrolyte also can to cause losing its high electronic conductivity.Therefore for this class high-capacity material, it is to improve conductivity in the carbon that traditional material preparation method makes its matrix majority that is scattered in high conductivity.And the most frequently used electrode preparation method is to introduce more conductive agent to be mainly carbon class conductive agent and binding agents such as acetylene black in this type of electrode system at present, mix the slurry coating of formation thickness in the Copper Foil collection liquid surface with the active cell powder body material, be prepared into composite battery, the negative effect of bringing with the low electric conductivity that overcomes material itself, thus the high power capacity performance of material is found full expression.But in negative material, add more conductive agent, improved its conductivity on the one hand, and reduced the bulk effect in the electrochemical process to a certain extent, but on the other hand, also increased the bulk density of electrode.Acetylene black itself has certain irreversible embedding lithium capacity in addition, therefore, can influence the reversibility first of system to a certain extent.At present academia and enterprise are very active to the research of the manufacturing process of the electrode material of height storage lithium performance and electrode, battery etc.
Summary of the invention
The object of the present invention is to provide the high power capacity composite electrode pole piece of lithium ion battery negative, the basic configuration that forms by the 3-dimensional metal network improves the electrical contact performance of electrode active material, with the embedding lithium degree of depth of effective control monolithic electrode and then improve its cyclical stability.
For achieving the above object, the present invention is achieved through the following technical solutions, high specific capacity composite electrode pole piece for lithium ion battery mainly is made of collector, high power capacity composite negative pole material and lug, collector adopts the electric conducting material with three-dimensional net structure to form, supporting construction for pole piece, the high power capacity composite negative pole material strengthens body by composite negative pole material and the composite negative pole material matrix is formed, and composite negative pole material strengthens the height degree and is scattered in the composite negative pole material matrix; The high power capacity composite negative pole material evenly is filled among the hole of collector by high temperature solid state reaction, combine by the interface with the skeleton of collector, formation has the combination electrode main body of embedding lithium activity, and the needs cut-parts according to battery design promptly constitute complete composite electrode pole piece; Collector one end is welded with lug, is connected with external circuit, forms current path.Collector is nickel foam, foam copper or carbon cloth.It is silicon, tin or its compound that composite negative pole material strengthens body, and the composite negative pole material matrix is nickel, copper, graphite or Pintsch process carbon.Lug is nickel sheet or stainless steel substrates.
The invention has the beneficial effects as follows: pole piece is not introduced conductive agent and binding agent commonly used in traditional electrodes of lithium-ion batteries, but be constructed with the pole piece of good dispersion and cementability, and have advantages such as low cost, easy-formation by the high temperature solid-state effect between active combination electrode material and the collector.
Description of drawings
The present invention is described in detail below in conjunction with the drawings and specific embodiments.
Fig. 1 is a pole piece essential structure schematic diagram of the present invention
Fig. 2 is that the inferior first charging and discharging curve of the two-dimensional structure pole piece of silicon of the present invention/carbon complex three-dimensional pole piece and the preparation of traditional coating method compares.Wherein: curve 1 is the compound pole piece of the utility model structure, and curve 2 is the two-dimensional structure pole piece that traditional coating method is constructed.
Among the figure: 1, collector, 2, composite negative pole material, 3, lug, 4, composite negative pole material strengthens body, 5, the composite negative pole material matrix.
Embodiment
As shown in Figure 1, confession of the present invention is a kind of lithium ion cell high-capacity composite negative pole pole piece with three-dimensional net structure.Mainly constitute with lug 3 by collector 1, high power capacity composite negative pole material 2, collector 1 adopts the electric conducting material with three-dimensional net structure to form, supporting construction for pole piece, high power capacity composite negative pole material 2 strengthens body 4 by composite negative pole material and composite negative pole material matrix 5 is formed, and composite negative pole material strengthens body 4 high degree of dispersion in composite negative pole material matrix 5; High power capacity composite negative pole material 2 evenly is filled among the hole of collector 1 by high temperature solid state reaction, combine by the interface with the skeleton of collector, formation has the combination electrode main body of embedding lithium activity, and the needs cut-parts according to battery design promptly constitute complete composite electrode pole piece; Collector 1 one ends are welded with lug 3, are connected with external circuit, form current path.Described collector 1 is nickel foam, foam copper or carbon cloth.It is silicon, tin or its compound that described composite negative pole material strengthens body 4, and composite negative pole material matrix 5 is nickel, copper, graphite or Pintsch process carbon, and lug 3 is nickel sheet or stainless steel substrates.
Fig. 2 be the silicon/carbon compound cathode pole piece for preparing according to electrode structure mode provided by the invention and traditional two-dimensional approach coating method preparation silicon/carbon electrode first charge-discharge relatively, wherein: curve 1 is the compound pole piece of the present invention's structure, and curve 2 is the two-dimensional structure pole piece that traditional coating method is constructed.The information that shows on the figure shows, adopts the effectively embedding lithium degree of depth of control electrode of composite negative pole pole piece of the present invention, can make electrode because the structural deterioration that the effect of degree of depth embedding lithium brings is eased.
Claims (4)
1, high specific capacity composite electrode pole piece for lithium ion battery, it is characterized in that, mainly constitute with lug (3) by collector (1), high power capacity composite negative pole material (2), collector (1) adopts the electric conducting material with three-dimensional net structure to form, supporting construction for pole piece, high power capacity composite negative pole material (2) strengthens body (4) by composite negative pole material and composite negative pole material matrix (5) is formed, and composite negative pole material strengthens body (4) high degree of dispersion in composite negative pole material matrix (5); High power capacity composite negative pole material (2) evenly is filled among the hole of collector (1) by high temperature solid state reaction, combine by the interface with the skeleton of collector, formation has the combination electrode main body of embedding lithium activity, and the needs cut-parts according to battery design promptly constitute complete composite electrode pole piece; Collector (1) one end is welded with lug (3), is connected with external circuit, forms current path.
2, described high specific capacity composite electrode pole piece for lithium ion battery according to claim 1 is characterized in that, described collector (1) is nickel foam, foam copper or carbon cloth.
3, described high specific capacity composite electrode pole piece for lithium ion battery according to claim 1, it is characterized in that, it is silicon, tin or its compound that described composite negative pole material strengthens body (4), and described composite negative pole material matrix (5) is nickel, copper, graphite or Pintsch process carbon.
4, described high specific capacity composite electrode pole piece for lithium ion battery according to claim 1 is characterized in that, described lug (3) is nickel sheet or stainless steel substrates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101909514A CN101465416A (en) | 2008-12-31 | 2008-12-31 | High specific capacity composite electrode pole piece for lithium ion battery |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2008101909514A CN101465416A (en) | 2008-12-31 | 2008-12-31 | High specific capacity composite electrode pole piece for lithium ion battery |
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| CN101465416A true CN101465416A (en) | 2009-06-24 |
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| CNA2008101909514A Pending CN101465416A (en) | 2008-12-31 | 2008-12-31 | High specific capacity composite electrode pole piece for lithium ion battery |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102544479A (en) * | 2011-12-15 | 2012-07-04 | 华中科技大学 | Preparation method of zinc cobaltate array/carbon cloth composite anode material of lithium ion battery |
| CN102683639A (en) * | 2012-06-12 | 2012-09-19 | 宁德新能源科技有限公司 | Lithium ion battery anode strip and lithium ion battery employing anode strip |
| CN105870491A (en) * | 2016-04-15 | 2016-08-17 | 辉能（天津）科技发展有限公司 | Lithium ion battery adopting porous conductive base material and capable of preventing pole piece from being crimped in lamination |
| CN105958010A (en) * | 2016-06-22 | 2016-09-21 | 周虎 | Composite negative electrode of lithium-ion battery and production method |
| CN107768673A (en) * | 2016-08-23 | 2018-03-06 | 宁德新能源科技有限公司 | Modified foam metal, electrode slice and secondary cell |
| CN107910496A (en) * | 2017-10-09 | 2018-04-13 | 中南大学 | A kind of secondary cell lithium anode, preparation method and applications |
| CN109546090A (en) * | 2018-11-30 | 2019-03-29 | 中国计量大学 | A kind of preparation process synthesizing silicon electrode using foam conductive net as carrier |
| CN109599528A (en) * | 2018-11-14 | 2019-04-09 | 银隆新能源股份有限公司 | A kind of pole piece coiled strip production method |
| CN112117029A (en) * | 2020-09-30 | 2020-12-22 | 浙江长宇新材料有限公司 | Composite conductive film and preparation method thereof |
| CN112751073A (en) * | 2020-12-02 | 2021-05-04 | 电子科技大学 | Structurally integrated battery, preparation method thereof and equipment with battery |
| WO2023159634A1 (en) * | 2022-02-28 | 2023-08-31 | 宁德时代新能源科技股份有限公司 | Negative electrode pole piece, electrode assembly, battery cell, battery, electrical device, and method and device for manufacturing negative electrode pole piece |
-
2008
- 2008-12-31 CN CNA2008101909514A patent/CN101465416A/en active Pending
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102544479B (en) * | 2011-12-15 | 2013-10-30 | 华中科技大学 | Preparation method of zinc cobaltate array/carbon cloth composite anode material of lithium ion battery |
| CN102544479A (en) * | 2011-12-15 | 2012-07-04 | 华中科技大学 | Preparation method of zinc cobaltate array/carbon cloth composite anode material of lithium ion battery |
| CN102683639A (en) * | 2012-06-12 | 2012-09-19 | 宁德新能源科技有限公司 | Lithium ion battery anode strip and lithium ion battery employing anode strip |
| CN102683639B (en) * | 2012-06-12 | 2016-03-23 | 宁德新能源科技有限公司 | A kind of anode sheet of lithium ion battery and use the lithium ion battery of this anode strip |
| CN105870491A (en) * | 2016-04-15 | 2016-08-17 | 辉能（天津）科技发展有限公司 | Lithium ion battery adopting porous conductive base material and capable of preventing pole piece from being crimped in lamination |
| CN105958010A (en) * | 2016-06-22 | 2016-09-21 | 周虎 | Composite negative electrode of lithium-ion battery and production method |
| CN107768673A (en) * | 2016-08-23 | 2018-03-06 | 宁德新能源科技有限公司 | Modified foam metal, electrode slice and secondary cell |
| CN107910496A (en) * | 2017-10-09 | 2018-04-13 | 中南大学 | A kind of secondary cell lithium anode, preparation method and applications |
| CN107910496B (en) * | 2017-10-09 | 2020-08-14 | 中南大学 | Metallic lithium cathode for secondary battery, preparation method and application thereof |
| CN109599528B (en) * | 2018-11-14 | 2022-03-15 | 银隆新能源股份有限公司 | Manufacturing method of pole piece coil stock |
| CN109599528A (en) * | 2018-11-14 | 2019-04-09 | 银隆新能源股份有限公司 | A kind of pole piece coiled strip production method |
| CN109546090A (en) * | 2018-11-30 | 2019-03-29 | 中国计量大学 | A kind of preparation process synthesizing silicon electrode using foam conductive net as carrier |
| CN112117029A (en) * | 2020-09-30 | 2020-12-22 | 浙江长宇新材料有限公司 | Composite conductive film and preparation method thereof |
| CN112117029B (en) * | 2020-09-30 | 2022-08-09 | 浙江长宇新材料股份有限公司 | Composite conductive film and preparation method thereof |
| CN112751073A (en) * | 2020-12-02 | 2021-05-04 | 电子科技大学 | Structurally integrated battery, preparation method thereof and equipment with battery |
| CN112751073B (en) * | 2020-12-02 | 2024-01-05 | 电子科技大学 | Structurally integrated battery and equipment with battery |
| WO2023159634A1 (en) * | 2022-02-28 | 2023-08-31 | 宁德时代新能源科技股份有限公司 | Negative electrode pole piece, electrode assembly, battery cell, battery, electrical device, and method and device for manufacturing negative electrode pole piece |
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Open date: 20090624 |