CN105529440A - High-rate high-capacity lithium ion negative electrode material - Google Patents
High-rate high-capacity lithium ion negative electrode material Download PDFInfo
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- CN105529440A CN105529440A CN201410510405.XA CN201410510405A CN105529440A CN 105529440 A CN105529440 A CN 105529440A CN 201410510405 A CN201410510405 A CN 201410510405A CN 105529440 A CN105529440 A CN 105529440A
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- lithium
- negative electrode
- electrode material
- lithium ion
- jumbo
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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 invention relates to the field of a battery material, and specifically to a high-rate high-capacity lithium ion negative electrode material. The high-rate high-capacity lithium ion negative electrode material comprises the following components in percentage by weight: 40-60% of Si-C composite material, 20-30% of graphene and 15-35% of lithium titanate. According to the negative electrode material provided by the invention, the thin-layer graphene having a relatively high conductivity is matched with the C-coated Si composite material, and then matched with the small-dimensional granular lithium titanate nanomaterial, so that the obtained negative electrode material has the characteristics of high rate and high capacity.
Description
Technical field
The present invention relates to battery material field, be specifically related to the jumbo ion cathode material lithium of a kind of high magnification.
Background technology
Graphite material is common lithium ion battery negative material, it has layer structure, maintain by Van der Waals force between layers, be conducive to the embedding of lithium and deviate from, in battery charge and discharge process, lithium is embedded in carbon-coating and can forms lithium intercalation compound LiC6, is 372mAh/g according to stoichiometric theoretical specific capacity.And material with carbon element lithium intercalation compound is all lower to the current potential of lithium, is generally less than 1V, most embedding lithium capacity is distributed between 0.0-0.2V, and have the features such as the high and discharge platform of good reversibility, capacity is low, be more satisfactory negative material simultaneously.But, simple graphite due to its specific capacity low, as large multiplying power high power capacity negative material use and improper.Therefore, the research and apply developing cathode material for high capacity lithium ion battery has become the key improving battery performance.In theory, some all can be used as lithium ion battery negative material with the metal of lithium component alloy system or metalloid, and these negative materials are referred to as alloy material of cathode.With graphite-phase ratio, the theory of alloy material of cathode storage lithium capacity is large, storage lithium current potential is low, good processability, conduct electricity very well, do not have the sensitiveness of environment material with carbon element detailed, there is the ability of fast charging and discharging, prevent the common insertion of solvent.
Summary of the invention
Technical problem to be solved by this invention is to provide the jumbo ion cathode material lithium of a kind of high magnification.
Technical problem to be solved by this invention is achieved by the following technical programs:
The jumbo ion cathode material lithium of a kind of high magnification, comprises the component of following percentage by weight:
Si-C composite material 40 ~ 60%; Graphene 20 ~ 30%; Lithium titanate 15 ~ 35%.
Further, described Si-C composite material is the composite material of C coated Si.
Further, the number of plies of described Graphene is 2 ~ 5 layers.
Further, the conductivity of described Graphene is 800 ~ 1200s/cm.
Further, the particle of described lithium titanate is 20 ~ 50nm.
The present invention has following beneficial effect:
Negative material of the present invention, utilizes the thin graphene with larger conductivity to coordinate the composite material of chi C coated Si, then coordinates the lithium titanate nano material of small sized particles, make negative material of the present invention have high magnification, jumbo characteristic.
Embodiment
Below in conjunction with embodiment, the present invention will be described in detail, and embodiment is only the preferred embodiment of the present invention, is not limitation of the invention.
Embodiment 1
The jumbo ion cathode material lithium of a kind of high magnification, comprises the component of following percentage by weight:
Si-C composite material 42%; Graphene 28%; Lithium titanate 30%.
Embodiment 2
The jumbo ion cathode material lithium of a kind of high magnification, comprises the component of following percentage by weight:
Si-C composite material 45%; Graphene 23%; Lithium titanate 32%.
Embodiment 3
The jumbo ion cathode material lithium of a kind of high magnification, comprises the component of following percentage by weight:
Si-C composite material 53%; Graphene 28%; Lithium titanate 19%.
Embodiment 4
The jumbo ion cathode material lithium of a kind of high magnification, comprises the component of following percentage by weight:
Si-C composite material 60%; Graphene 21%; Lithium titanate 19%.
The above embodiment only have expressed embodiments of the present invention; it describes comparatively concrete and detailed; but therefore can not be interpreted as the restriction to the scope of the claims of the present invention; in every case the technical scheme adopting the form of equivalent replacement or equivalent transformation to obtain, all should drop within protection scope of the present invention.
Claims (5)
1. the jumbo ion cathode material lithium of high magnification, is characterized in that, comprises the component of following percentage by weight:
Si-C composite material 40 ~ 60%;
Graphene 20 ~ 30%;
Lithium titanate 15 ~ 35%.
2. the jumbo ion cathode material lithium of a kind of high magnification according to claim 1, is characterized in that, described Si-C composite material is the composite material of C coated Si.
3. the jumbo ion cathode material lithium of a kind of high magnification according to claim 1, is characterized in that, the number of plies of described Graphene is 2 ~ 5 layers.
4. the jumbo ion cathode material lithium of a kind of high magnification according to claim 3, is characterized in that, the conductivity of described Graphene is 800 ~ 1200s/cm.
5. the jumbo ion cathode material lithium of a kind of high magnification according to claim 1, is characterized in that, the particle of described lithium titanate is 20 ~ 50nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410510405.XA CN105529440A (en) | 2014-09-29 | 2014-09-29 | High-rate high-capacity lithium ion negative electrode material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410510405.XA CN105529440A (en) | 2014-09-29 | 2014-09-29 | High-rate high-capacity lithium ion negative electrode material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105529440A true CN105529440A (en) | 2016-04-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410510405.XA Pending CN105529440A (en) | 2014-09-29 | 2014-09-29 | High-rate high-capacity lithium ion negative electrode material |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101232094A (en) * | 2008-02-02 | 2008-07-30 | 广州市鹏辉电池有限公司 | Lithium ion battery negative pole active materials and battery |
| CN102208609A (en) * | 2010-03-31 | 2011-10-05 | 比亚迪股份有限公司 | Method for preparing lithium titanate material for lithium ion battery and lithium titanate material |
| CN102412396A (en) * | 2011-11-11 | 2012-04-11 | 深圳市德方纳米科技有限公司 | Lithium ion battery electrode material coated with discontinuous graphene |
| CN102569750A (en) * | 2012-03-21 | 2012-07-11 | 中国科学院宁波材料技术与工程研究所 | Cathode composite material of lithium ion battery and preparation method thereof |
| CN103833032A (en) * | 2014-03-11 | 2014-06-04 | 中国第一汽车股份有限公司 | Graphene-based composite cathode material |
-
2014
- 2014-09-29 CN CN201410510405.XA patent/CN105529440A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101232094A (en) * | 2008-02-02 | 2008-07-30 | 广州市鹏辉电池有限公司 | Lithium ion battery negative pole active materials and battery |
| CN102208609A (en) * | 2010-03-31 | 2011-10-05 | 比亚迪股份有限公司 | Method for preparing lithium titanate material for lithium ion battery and lithium titanate material |
| CN102412396A (en) * | 2011-11-11 | 2012-04-11 | 深圳市德方纳米科技有限公司 | Lithium ion battery electrode material coated with discontinuous graphene |
| CN102569750A (en) * | 2012-03-21 | 2012-07-11 | 中国科学院宁波材料技术与工程研究所 | Cathode composite material of lithium ion battery and preparation method thereof |
| CN103833032A (en) * | 2014-03-11 | 2014-06-04 | 中国第一汽车股份有限公司 | Graphene-based composite cathode material |
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Application publication date: 20160427 |