Preparation of hard carbon–coated and metal-modified silicon anode materials for lithium-ion batteries

IF 2.4 4区 化学 Q3 CHEMISTRY, PHYSICAL Ionics Pub Date : 2024-10-05 DOI:10.1007/s11581-024-05870-1
Feiyang Chen, Jun Chen, Guojun Xu, Chenxin Jin, Haoqiang Ma, Lijun Wen, Chuanbin Tu, Fugen Sun, Yong Li, Hui Li, Lang Zhou, Zhihao Yue
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Abstract

High-capacity silicon anode is one of the ideal anode materials for the next generation, but the volume expansion effect and low conductivity hinder its development. In this study, a simple and low-cost method was employed to prepare micron-sized silicon raw materials. Subsequently, a hard carbon-coated structure was combined with the metal modification method to successfully prepare hard carbon–coated silver-modified silicon particle material. Due to the hard carbon coating structure, Si/Ag@HC materials can effectively alleviate the volume expansion of silicon, and the modification of metallic silver can not only improve the conductivity of silicon, but also further enhance the ability to limit the volume expansion effect. The Si/Ag@HC maintains a specific capacity of 997.05 mAh g−1 after 200 cycles at a current density of 0.5C, and it also shows an excellent rate performance of over 600 mAh g−1 at a current density of 2C.

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来源期刊
Ionics
Ionics 化学-电化学
CiteScore
5.30
自引率
7.10%
发文量
427
审稿时长
2.2 months
期刊介绍: Ionics is publishing original results in the fields of science and technology of ionic motion. This includes theoretical, experimental and practical work on electrolytes, electrode, ionic/electronic interfaces, ionic transport aspects of corrosion, galvanic cells, e.g. for thermodynamic and kinetic studies, batteries, fuel cells, sensors and electrochromics. Fast solid ionic conductors are presently providing new opportunities in view of several advantages, in addition to conventional liquid electrolytes.
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