高容量材料Si@CPZS在锂离子电池中的储锂性能研究

doi:10.13208/j.electrochem.190226

电化学（中英文） ›› 2020, Vol. 26 ›› Issue (1): 121-129. doi: 10.13208/j.electrochem.190226

高容量材料Si@C_PZS在锂离子电池中的储锂性能研究

张庆暖¹^,²^,^a, 张芳芳¹^,²^,^a, 李红霞¹, 杨兵军¹, 李小成¹, 杨娟¹^,^*()

^1. 中国科学院兰州化学物理研究所,甘肃兰州 730000
^2. 中国科学院大学,北京 100080

收稿日期:2019-02-26 修回日期:2019-03-22 出版日期:2020-02-28 发布日期:2019-03-29
通讯作者: 杨娟 E-mail:yangjuan@licp.cas.cn
作者简介:第一联系人：
a. 共同第一作者.
基金资助:
国家自然科学基金项目(21573265);国家自然科学基金项目(21805292)

Lithium Storage Performance of High Capacity Material Si@C_PZS in Lithium Ion Batteries

Qing-nuan ZHANG¹^,²^,^a, Fang-fang ZHANG¹^,²^,^a, Hong-xia LI¹, Bing-jun YANG¹, Xiao-cheng LI¹, Juan YANG¹^,^*()

^1. Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
^2. University of Chinese Academy of Sciences, Beijing 100080, China

Received:2019-02-26 Revised:2019-03-22 Published:2020-02-28 Online:2019-03-29
Contact: Juan YANG E-mail:yangjuan@licp.cas.cn

摘要/Abstract

摘要：

本文通过简单的溶胶-凝胶法以聚环三磷腈-4,4'-磺酰基二苯酚聚合物（PZS）为碳源通过在硅纳米颗粒表面包覆碳层,成功构筑了核壳结构的Si@C复合材料. 通过对不同厚度碳层包覆的Si@C_PZS的储锂性能进行研究,发现当硅表面PZS衍生碳厚度为10 nm时具有最佳的储锂性能,且经过长达290圈的循环后容量仍然保持在940 mAh·g^-1,并且利用X射线衍射图谱、热重、比表面孔径测定仪及透射电镜等分析手段对样品进行了结构和组分分析. 本文进一步将Si@C_PZS复合材料作为石墨的添加剂,结果表明30%的Si@C_PZS复合材料可将石墨负极的容量提升至700 mAh·g^-1.

关键词: Si@C, 负极, 锂离子电池, 石墨添加剂

Abstract:

Carbon layers with different thicknesses were introduced into the surfaces of silicon (Si) nanoparticles by sol-gel method using poly (cyclotriphosphazene-co-4, 4'-sulfonyldiphenol) as the carbon source. Technologies of X-ray diffraction, thermo-gravimetric analysis, Brunauer-Emmett-Teller and transmission electron microscopy were employed to analyze the structures and components of the as-prepared Si@C_PZS composites. Electrochemical performance of Si@C_PZS with different carbon thicknesses was studied. The results showed that Si@C_PZS with carbon thickness of 10 nm possessed the best performance. Its capacity remained 940 mAh·g^-1 after 290 cycles under 500 mA·g^-1. As the addictive, the graphite-based anode contained 30% of Si@C_PZS composite could achieve the specific capacity higher than 700 mAh·g^-1.

Key words: Si@C, anode, lithium ion battery, addictive of graphite

中图分类号:

O646
TQ174

张庆暖, 张芳芳, 李红霞, 杨兵军, 李小成, 杨娟. 高容量材料Si@C_PZS在锂离子电池中的储锂性能研究[J]. 电化学（中英文）, 2020, 26(1): 121-129.

Qing-nuan ZHANG, Fang-fang ZHANG, Hong-xia LI, Bing-jun YANG, Xiao-cheng LI, Juan YANG. Lithium Storage Performance of High Capacity Material Si@C_PZS in Lithium Ion Batteries[J]. Journal of Electrochemistry, 2020, 26(1): 121-129.

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链接本文: https://electrochem.xmu.edu.cn/CN/10.13208/j.electrochem.190226

https://electrochem.xmu.edu.cn/CN/Y2020/V26/I1/121

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Sample	Carbon source	Si content/wt%	Current density/ (mA·g^-1)	Capacity/ (mAh·g^-1)	Reference
Si@C_{PZS 100}	PZS	85.2	500	940(290 cycles)	This work
Si@SiO_x@C	glucose	75	150	1100(60 cycles)	[21]
Sample	Carbon source	Si content/wt%	Current density/ (mA·g^-1)	Capacity/ (mAh·g^-1)	Reference
Si@C	acetylene	15	250	639(200 cycles)	[14]
Si@void@C	dopamine	75	100	804(50 cycles)	[11]
Si@10C	phenolic resins	81.7	500	1006(500 cycles)	[20]

高容量材料Si@C_PZS在锂离子电池中的储锂性能研究

Lithium Storage Performance of High Capacity Material Si@C_PZS in Lithium Ion Batteries

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高容量材料Si@CPZS在锂离子电池中的储锂性能研究

Lithium Storage Performance of High Capacity Material Si@CPZS in Lithium Ion Batteries

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高容量材料Si@C_PZS在锂离子电池中的储锂性能研究

Lithium Storage Performance of High Capacity Material Si@C_PZS in Lithium Ion Batteries