不同粒径纳米硅制备Si@C/石墨负极材料及其电化学性能

doi:10.11896/cldb.17120065

材料导报

2019, Vol. 33

Issue (18): 3021-3025 https://doi.org/10.11896/cldb.17120065

无机非金属及其复合材料

不同粒径纳米硅制备Si@C/石墨负极材料及其电化学性能

王英, 阮威, 唐仁衡, 肖方明, 孙泰, 黄玲

广东省稀有金属研究所,广东省稀土开发及应用重点实验室,广州 510650

Preparation of Si@C/Graphite Anode Materials with Different Particle Size Nanoscale-Si and Their Electrochemical Properties

WANG Ying, RUAN Wei, TANG Renheng, XIAO Fangming, SUN Tai, HUANG Ling

Guangdong Province Key Laboratory of Rare Earth Development and Application, Guangdong Research Institute of Rare Metals, Guangzhou 510650

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摘要采用喷雾干燥热解法制备了Si@C/石墨复合材料,利用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)对合成材料的结构、形貌进行表征,将材料作为正极制备模拟电池,对电池进行恒流充放电和循环伏安(CV)测试。结果表明:具有不同纳米尺度的原料硅直接影响复合材料的性能。所研究的三种硅颗粒的粒径越小,电池的循环稳定性越好。以平均粒径为80 nm的硅合成的复合材料Si@C/石墨制备而成的电池具有较好的综合电化学性能,以100 mA/g电流密度充放电时,首次放电比容量可以达到774.3 mAh/g,100次循环后容量保持率为78.1%。

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关键词: 锂离子电池负极材料 Si@C/石墨复合材料纳米硅电化学性能

Abstract: Si@C/graphite composites were synthesized based on the industrial nano-silicon via spray drying and thermal pyrolysis method,and the structure, morphology and electrochemical property of as-prepared composites were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), constant current charge/discharge and cyclic voltammetry (CV). The results indicate that silicon with different nanoscale sizes directly affects composites properties. The smaller the particle size of silicon is, the better stability of composites will become. The cell prepared by Si@C/Graphite composite material which contains 80 nm silicon displays a higher initial discharge capacity of 774.3 mAh/g at 100 mA/g. After 100 cycles,the capacity retention rate is 78.1%.

Key words: lithium-ion batteries anode material Si@C/graphite composite materials nano-silicon electrochemical property

出版日期: 2019-09-25 发布日期: 2019-07-31

ZTFLH:	TM9129
	TM531

基金资助: 广州市科技计划项目(201802020029);广东省自然科学基金项目(2014A030308015);广东省省级科技计划项目(2015B010116002);广东省稀土产业技术创新联盟平台(2017B090907026)

通讯作者: wy2228086@126.com

作者简介: 王英,广东省稀有金属研究所教授级高工。1994年9月至1997年3月,在东北大学获得有色金属冶金专业工学硕士学位。以第一作者在国内外学术期刊上发表论文20余篇,申请国家发明专利8项,其中授权4项。研究工作主要围绕国家重点发展的新能源材料,开展关于锂离子电池材料的制备和应用研究,主持的项目包括广东省自然科学基金面上项目、广东省工业攻关和产学研项目、广州市应用基础和国际合作项目等。

引用本文:

王英, 阮威, 唐仁衡, 肖方明, 孙泰, 黄玲. 不同粒径纳米硅制备Si@C/石墨负极材料及其电化学性能[J]. 材料导报, 2019, 33(18): 3021-3025.
WANG Ying, RUAN Wei, TANG Renheng, XIAO Fangming, SUN Tai, HUANG Ling. Preparation of Si@C/Graphite Anode Materials with Different Particle Size Nanoscale-Si and Their Electrochemical Properties. Materials Reports, 2019, 33(18): 3021-3025.

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http://www.mater-rep.com/CN/10.11896/cldb.17120065 或 http://www.mater-rep.com/CN/Y2019/V33/I18/3021

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