张伶潇,张丽娟,梁菊梅,郭雨萌,希利德格.锂一次电池正极材料CFx-Cu的高倍率性能研究[J].稀有金属材料与工程,2020,49(7):2256~2261.[Zhang Lingxiao,Zhang Lijuan,Liang Jumei,Guo Yumeng,Xili Dege.CFx-Cu composites with excellent high rate performances as cathode materials for Lithium primary batteries[J].Rare Metal Materials and Engineering,2020,49(7):2256~2261.]
锂一次电池正极材料CFx-Cu的高倍率性能研究
投稿时间:2019-06-26  修订日期:2019-09-18
中文关键词:  CF[sub_s]x[sub_e]-Cu正极材料  锂电池  高倍率性能
基金项目:
中文摘要:
      本文采用一种简单新颖的原位化学改性方法制备了锂电池用CFx-Cu复合正极材料。采用XRD、SEM、EDS、TGA、EIS、CV和恒电流放电对正极材料的结构、形貌、反应机理和电化学性能进行了表征。CuO与分布在CFx边缘或表面的非活性基团反应原位生成纳米铜,有效地提高了材料的电子导电性和锂离子扩散率,从而使改性材料显示出优异的比容量、倍率性能及功率密度。CFx-Cu复合材料在5 C的高倍率下,其放电比容量高达546 mAh/g,最大功率密度为8393 w/kg,放电电压平台为2.0 V。
CFx-Cu composites with excellent high rate performances as cathode materials for Lithium primary batteries
英文关键词:CFx-Cu cathode materials  lithium battery  high rate performance
英文摘要:
      In this work, we have successfully prepared CFx-Cu cathode materials for primary lithium battery through a simple and novel in-situ chemical modification method with high-temperature calcination process. The structure, morphology, reaction mechanism and electrochemical performance of cathode materials were characterized by X-ray powder diffraction, high-resolution transmission electron microscopy, scanning electron microscope, energy dispersive X-ray spectroscopic, thermo gravimetric analysis, cyclic voltammetry and galvanostatic discharge. It can be inferred that copper oxide reacts with inert groups on the surface of CFx to produce nano-copper particles, which increases the electronic conductivity and diffusion performance of lithium-ion in the CFx-Cu cathode materials. Therefore, the composite exhibits excellent specific capacity, rate performance and power density. Specifically, the CFx-Cu composites shows a high discharge specific capacity of 546 mAh/g, a maximum power density of 8393 W/kg, with a discharge voltage platform of 2.0 V at 5 C.
作者单位E-mail
张伶潇 北京工业大学 zhanglingxiao1619@163.com 
张丽娟 北京工业大学 zhanglj1997@bjut.edu.cn 
梁菊梅 北京工业大学  
郭雨萌 北京工业大学  
希利德格 北京工业大学  
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