碳包覆二氧化硅纳米线负极材料的制备及其储锂性能研究  

Preparation of carbon-coated silica nanowire anode materials and their lithium storage properties

作　　者：兰晓艳 周兴兰 焦子攀 张鹏 Lan Xiaoyan;Zhou Xinglan;Jiao Zipan;Zhang Peng(School of Mechanical Engineering,Qinghai University,Xining 810016)

机构地区：[1]青海大学机械工程学院,西宁810016

出　　处：《化工新型材料》2024年第7期115-119,125,共6页New Chemical Materials

基　　金：青海省自然科学基金应用基础研究项目(2023-ZJ-741)。

摘　　要：二氧化硅(SiO_(2))纳米线负极具有非常良好的电化学性能,但其商业化应用受制于其复杂且成本较高的制备工艺。纤蛇纹石棉含有天然的纳米线结构,经过简单的预处理后即可制备成二氧化硅纳米线。将纤蛇纹石棉经破壁机破碎后,预处理得到二氧化硅纳米线,再将其与多巴胺包覆,形成碳包覆的二氧化硅纳米线结构。这种结构具有非常良好的电化学性能,初始放电容量达到1186mAh/g,在1A/g的电流密度下循环100圈后仍具有600mAh/g的可逆容量。Silica nanowire anodes exhibit commendable electrochemical properties,but their commercial applications are limited by their complex and costly preparation processes.Conversely,serpentine asbestos harbors a natural nanowire structure,which is amenable to facile conversion into silica nanowires following uncomplicated pretreatment procedures.In this paper,serpentine asbestos was crushed by a wall breaker and pretreated to obtain silica nanowires.These nanowires were then coated with dopamine to form a carbon-coated silica nanowire structure.This structure had very good electrochemical properties,with an initial discharge capacity of 1186mAh/g and a reversible capacity of 600mAh/g even after 100 cycles at a current density of 1A/g.

关 键 词：二氧化硅纳米线 纤蛇纹石棉 锂离子电池 

分 类 号：TQ116.21[化学工程—无机化工]