CN108123120B - 一种锂电池用纳米硅酸铁锂/石墨烯正极材料及其制备方法 - Google Patents
一种锂电池用纳米硅酸铁锂/石墨烯正极材料及其制备方法 Download PDFInfo
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- CN108123120B CN108123120B CN201711280939.8A CN201711280939A CN108123120B CN 108123120 B CN108123120 B CN 108123120B CN 201711280939 A CN201711280939 A CN 201711280939A CN 108123120 B CN108123120 B CN 108123120B
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- H—ELECTRICITY
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
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- H—ELECTRICITY
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- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
- H01M4/625—Carbon or graphite
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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
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Abstract
Description
正极材料 | 锂离子扩散系数cm<sup>2</sup>s<sup>-1</sup> | 首次放电比容量mAhg<sup>-1</sup> | 循环后放电容量mAhg<sup>-1</sup> | 循环50次容量保持率% |
本发明 | 7.87×10<sup>-12</sup> | 176.2 | 168.5 | 95.4 |
石墨烯/硅酸铁锂 | 5.39×10<sup>-12</sup> | 116.2 | 104.1 | 89.7 |
样品 | 0.1C首次放电比容量mAhg<sup>-1</sup> | 0.1C循环后放电容量mAhg<sup>-1</sup> | 循环50次容量保持率% | 0.5C首次放电比容量mAhg<sup>-1</sup> | 1C首次放电比容量mAhg<sup>-1</sup> |
实施例1 | 176.2 | 168.5 | 95.4 | 127.3 | 98.3 |
实施例2 | 178.6 | 169.2 | 94.9 | 129.4 | 99.1 |
实施例3 | 175.3 | 167.7 | 95.7 | 128.1 | 98.5 |
实施例4 | 176.9 | 168.8 | 95.4 | 127.6 | 98.2 |
实施例5 | 177.4 | 170.0 | 95.8 | 126.3 | 98.5 |
对比例1 | 146.2 | 128.1 | 87.6 | 104.6 | 82.4 |
Claims (9)
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Publication number | Priority date | Publication date | Assignee | Title |
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WO2020181046A1 (en) * | 2019-03-06 | 2020-09-10 | The Trustees Of Indiana University | Lithium silicate cathodes for lithium-ion batteries |
CN110993923B (zh) * | 2019-12-26 | 2021-11-23 | 湖北亿纬动力有限公司 | 一种碳包覆辅助的钠钛双掺杂硅酸铁锂正极材料及其制备方法和用途 |
CN111710848A (zh) * | 2020-06-30 | 2020-09-25 | 贝特瑞新材料集团股份有限公司 | 硅氧复合负极材料及其制备方法和锂离子电池 |
CN114361423B (zh) * | 2022-01-12 | 2024-08-02 | 浙江天能储能科技发展有限公司 | 一种纳米晶铁硅合金基正极材料及其制备方法 |
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