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作者:

Xu, XiaoLong (Xu, XiaoLong.) | Qi, CongYu (Qi, CongYu.) | Hao, ZhenDong (Hao, ZhenDong.) | Wang, Hao (Wang, Hao.) (学者:汪浩) | Jiu, JinTing (Jiu, JinTing.) | Liu, JingBing (Liu, JingBing.) | Yan, Hui (Yan, Hui.) | Suganuma, Katsuaki (Suganuma, Katsuaki.)

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摘要:

The requirement of energy-storage equipment needs to develop the lithium ion battery (LIB) with high electrochemical performance. The surface modification of commercial LiFePO4 (LFP) by utilizing zeolitic imidazolate frameworks-8 (ZIF-8) offers new possibilities for commercial LFP with high electrochemical performances. In this work, the carbonized ZIF-8 (CZIF-8) was coated on the surface of LFP particles by the in situ growth and carbonization of ZIF-8. Transmission electron microscopy indicates that there is an approximate 10 nm coating layer with metal zinc and graphite-like carbon on the surface of LFP/CZIF-8 sample. The N-2 adsorption and desorption [GRAPHICS] isotherm suggests that the coating layer has uniform and simple connecting mesopores. As cathode material, LFP/CZIF-8 cathode-active material delivers a discharge specific capacity of 159.3 mAh g(-1) at 0.1C and a discharge specific energy of 141.7 mWh g(-1) after 200 cycles at 5.0C (the retention rate is approximate 99%). These results are attributed to the synergy improvement of the conductivity, the lithium ion diffusion coefficient, and the degree of freedom for volume change of LFP/CZIF-8 cathode. This work will contribute to the improvement of the cathode materials of commercial LIB.

关键词:

LiFePO4 Surface coating Lithium ion battery Cathode Zeolitic imidazolate frameworks-8

作者机构:

  • [ 1 ] [Xu, XiaoLong]Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China
  • [ 2 ] [Qi, CongYu]Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China
  • [ 3 ] [Hao, ZhenDong]Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China
  • [ 4 ] [Wang, Hao]Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China
  • [ 5 ] [Liu, JingBing]Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China
  • [ 6 ] [Yan, Hui]Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China
  • [ 7 ] [Jiu, JinTing]Osaka Univ, Inst Sci & Ind Res, Osaka, Japan
  • [ 8 ] [Suganuma, Katsuaki]Osaka Univ, Inst Sci & Ind Res, Osaka, Japan

通讯作者信息:

  • 汪浩

    [Wang, Hao]Beijing Univ Technol, Coll Mat Sci & Engn, Beijing 100124, Peoples R China

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来源 :

NANO-MICRO LETTERS

ISSN: 2311-6706

年份: 2018

期: 1

卷: 10

2 6 . 6 0 0

JCR@2022

ESI学科: MATERIALS SCIENCE;

ESI高被引阀值:260

JCR分区:1

被引次数:

WoS核心集被引频次: 64

SCOPUS被引频次: 113

ESI高被引论文在榜: 0 展开所有

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中文被引频次:

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