高等学校化学学报 ›› 2020, Vol. 41 ›› Issue (3): 447-455.doi: 10.7503/cjcu20190545

• 庆祝《高等学校化学学报》复刊40周年专栏 • 上一篇    下一篇

用作锂离子电池负极的FeS2微球的制备及性能

荣华1,2,王春刚2,*,周明2,*   

  1. 1. 吉林建筑大学材料科学与工程学院, 长春 130118
    2. 东北师范大学化学学院, 长春 130024
  • 收稿日期:2019-10-21 出版日期:2020-03-10 发布日期:2020-01-10
  • 通讯作者: 王春刚,周明
  • 作者简介:王春刚, 男, 博士, 教授, 主要从事纳微米材料的合成研究. E-mail: wangcg925@nenu.edu.cn|周 明, 男, 博士, 教授, 主要从事电化学研究. E-mail: zhoum739@nenu.edu.cn
  • 基金资助:
    吉林省科技发展计划项目资助(No. 20170520148JH)

Synthesis and Electrochemical Performance of FeS2 Microspheres as an Anode for Li-ion Batteries

RONG Hua1,2,WANG Chungang2,*,ZHOU Ming2,*   

  1. 1. School of Materials Science and Engineering, Jilin Jianzhu University, Changchun 130118, China
    2. School of Chemistry, Northeast Normal University, Changchun 130024, China
  • Received:2019-10-21 Online:2020-03-10 Published:2020-01-10
  • Contact: Chungang WANG,Ming ZHOU
  • Supported by:
    † Supported by the Science and Technology Development Planning of Jilin Province, China(No. 20170520148JH)

摘要:

以氯化亚铁和硫代硫酸钠为原料, 采用水热法一步合成了由FeS2纳米片堆积的FeS2微球. 通过调控铁源与硫源的摩尔比及水热合成时间, 并结合X射线衍射(XRD)和扫描电子显微镜(SEM)表征结果推测了FeS2的生长机理, 筛选出最优条件以提升其电化学性能. 电化学测试结果表明, 在500 mA/g的电流密度条件下, 材料的首次放电/充电容量可分别达到905和800 mA·h·g -1, 首次库伦效率达到88.4%; 在2000 mA/g的大电流密度条件下, 500次放电/充电循环后依然稳定保持350 mA·h·g -1的可逆容量.

关键词: 储锂性能, 负极材料, 黄铁矿, 水热法

Abstract:

FeS2 nanosheets assembled FeS2 microspheres were synthesized using ferric chloride(Ⅱ) and sodium thiosulfate as raw materials via one-pot hydrothermal method. We speculate the FeS2 growth mechanism by regulating the molar ratio of iron source to sulfur source and hydrothermal time. Meanwhile, we combine with XRD and SEM characterization results and filter optimal conditions to improve the electrochemical performance. At the current density of 500 mA/g, first discharge/charge capacity can reach 905 mA·h·g -1 and 800 mA·h·g -1, respectively, and the coulombic efficiency is 88.4%. Even at high current density of 2000 mA/g, the FeS2 exhibit excellent cycling behavior with a stable capacity of 350 mA·h·g -1 after 500 cycles.

Key words: Lithium storage property, Anode material, FeS2, Hydrothermal method

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