氟元素掺杂的硅碳复合材料的制备和电化学性能

doi:10.12028/j.issn.2095-4239.2018.0241

储能科学与技术 ›› 2019, Vol. 8 ›› Issue (S1): 56-59.doi: 10.12028/j.issn.2095-4239.2018.0241

氟元素掺杂的硅碳复合材料的制备和电化学性能

刘兴稳, 贺劲鑫, 王海林, 靳承铀, 缪永华, 薛驰

江苏中天科技股份有限公司, 江苏南通 226009

收稿日期:2018-12-12 修回日期:2019-01-26 出版日期:2019-12-05 发布日期:2019-03-06
通讯作者: 贺劲鑫,博士,工程师,主要研究方向电池材料、器件及系统开发,E-mail:hejx@chinaztt.com
作者简介:刘兴稳(1988-),男,硕士,主要研究方向为硅碳负极材料的开发和应用,E-mail:liuxw@chinaztt.com
基金资助:
江苏省重点研发项目《长寿命、高比容量硅碳负极材料开发》（BE2016008-1）。

Preparation and electrochemical performance of F-doped SiO@C composite material

LIU Xingwen, HE Jinxin, WANG Hailin, JIN Chengyou, MIAO Yonghua, XUE Chi

Jiangsu Zhongtian Technology Co., Ltd, Nantong 226009, Jiangsu, China

Received:2018-12-12 Revised:2019-01-26 Online:2019-12-05 Published:2019-03-06

摘要/Abstract

摘要： 本工作以SiO、沥青和聚四氟乙烯为原料，通过机械融合和加热包覆，制备出了氟元素掺杂的硅碳复合材料。采用SEM、TEM、XRD、红外碳硫分析、激光粒度分析、粉末电阻率和比表面积测试仪等对样品进行了微观形貌表征和物相结构分析。电化学测试表明：当聚四氟乙烯用量为20%（质量百分数）时，SiO@C-F材料具有优异的电化学性能，可逆比容量为1426.8 mA·h/g，首次效率为77.01%，20圈容量保持率83.95%。

关键词: 氟元素掺杂, 硅碳, 负极材料, 锂离子电池

Abstract: The F-doped SiO@C composites material were synthesized via mechanical fusion and heating coating of SiO, pitch and polyfluortetraethylene (PTFE). The morphology structure and the phase composition of the samples were characterized by SEM, TEM, XRD, infrared carbon and sulfur analysis, laser particle analyzer, powder resistivity and specific surface area. Results showed that:when the dosage of PTFE was 20%, the SiO@C-F composites had the excellent electrochemical performance, witch exhibited the reversible capacity of 1426.8 mA·h/g, initial coulombic efficiency of 77.01% and capacity retention of 83.95% after 20 cycles.

Key words: F-doped, SiO@C, anode materials, lithium ion batteries

中图分类号:

TM912

刘兴稳, 贺劲鑫, 王海林, 靳承铀, 缪永华, 薛驰. 氟元素掺杂的硅碳复合材料的制备和电化学性能[J]. 储能科学与技术, 2019, 8(S1): 56-59.

LIU Xingwen, HE Jinxin, WANG Hailin, JIN Chengyou, MIAO Yonghua, XUE Chi. Preparation and electrochemical performance of F-doped SiO@C composite material[J]. Energy Storage Science and Technology, 2019, 8(S1): 56-59.

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氟元素掺杂的硅碳复合材料的制备和电化学性能

Preparation and electrochemical performance of F-doped SiO@C composite material

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