A long-life nano-silicon anode for lithium ion batteries: supporting of graphene nanosheets exfoliated from expanded graphite by plasma-assisted milling

时间:2018-05-25作者:浏览量:193


标题

A long-life nano-silicon anode for lithium ion batteries: supporting of graphene nanosheets exfoliated from expanded graphite by plasma-assisted milling

作者

作者:Sun, W (Sun, Wei)[1 ]; Hu, RZ (Hu, Renzong)[1 ]; Zhang, HY (Zhang, Hanyin)[1 ]; Wang, YK (Wang, Yukun)[1 ]; Yang, LC (Yang, Lichun)[1 ]; Liu, JW (Liu, Jiangwen)[1 ]; Zhu, M (Zhu, Min)[1 ]

期刊信息


ELECTROCHIMICA ACTA


卷:187

页:1-10

DOI:10.1016/j.electacta.2015.11.020

出版年:JAN 1 2016

文献类型:Article

查看期刊影响力

摘要

In order to enhance the cycleability and electronic conductivity of Si-based anodes, we fabricated a hierarchical micro-nano structured silicon/graphene nanosheets (Si/GNs) hybrid by discharge plasma-assisted milling (P-milling) using Si nanoparticles and expanded graphite (EG) as starting materials. Owing to the synergistic effect of rapid plasma heating and ball mill grinding with Si nanoparticles as nanomiller, the graphene nanosheets was exfoliated efficiently from the loose structured EG, which tightly wrapped and connected the Si nanoparticles to form microsized composite agglomerates. This high powder tap density Si/GNs hybrid exhibited a high reversible capacity of 942 mAh g (1) (857 mAh cm (3)) at the current density of 0.2 Ag (1), with 88% capacity retention after 100 cycles. The charge capacity remained super stable more than 350 times when the electrode was cycled with a fixed lithiation capacity of 1000 mAh g (1) at a current density of 0.2 Ag (1) between 0.01 and 1.5 V (vs. Li/Li+). This superior cycle performance was attributed to the microsized GNs matrix which facilitated the electronic conductivity and the Li+ diffusion in the hybrid, and effectively accommodated the volume change of Si nanoparticles during Li+ alloying and dealloying processes. (C) 2015 Elsevier Ltd. All rights reserved.

关键词

作者关键词:Lithium ion batteries; Silicon anode; Expanded graphite; Discharge plasma; Milling

作者信息

作者信息

通讯作者地址:Zhu, M (通讯作者)

显示更多S China Univ Technol, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510641, Guangdong, Peoples R China.


地址:

显示更多[ 1 ] S China Univ Technol, Guangdong Prov Key Lab Adv Energy Storage Mat, Guangzhou 510641, Guangdong, Peoples R China


电子邮件地址:memzhu@scut.edu.cn

出版商

PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND

类别分类

类别 / 分类

研究方向:Electrochemistry

Web of Science 类别:Electrochemistry