CN105529440A - High-rate high-capacity lithium ion negative electrode material - Google Patents

High-rate high-capacity lithium ion negative electrode material Download PDF

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Publication number
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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CN
China
Prior art keywords
lithium
negative electrode
electrode material
lithium ion
jumbo
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.)
Pending
Application number
CN201410510405.XA
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Chinese (zh)
Inventor
曾金生
黄海晏
吴峰
刘文磊
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Fenghuang New Energy (huizhou) Co Ltd
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Fenghuang New Energy (huizhou) Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fenghuang New Energy (huizhou) Co Ltd filed Critical Fenghuang New Energy (huizhou) Co Ltd
Priority to CN201410510405.XA priority Critical patent/CN105529440A/en
Publication of CN105529440A publication Critical patent/CN105529440A/en
Pending legal-status Critical Current

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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

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

The jumbo ion cathode material lithium of a kind of high magnification
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.
CN201410510405.XA 2014-09-29 2014-09-29 High-rate high-capacity lithium ion negative electrode material Pending CN105529440A (en)

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

Family

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Family Applications (1)

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

Country Status (1)

Country Link
CN (1) CN105529440A (en)

Citations (5)

* Cited by examiner, † Cited by third party
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 non-continuous 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

Patent Citations (5)

* Cited by examiner, † Cited by third party
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 non-continuous 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