Premium
SiO 2 /C Composite Derived from Rice Husks with Enhanced Capacity as Anodes for Lithium‐Ion Batteries
Author(s) -
Feng Yi,
Liu Xiaoyang,
Liu Li,
Zhang Ziqing,
Teng Yifei,
Yu Deyang,
Sui Jiayang,
Wang Xiaofeng
Publication year - 2018
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201802353
Subject(s) - anode , materials science , ball mill , composite number , husk , electrochemistry , chemical engineering , raw material , porosity , lithium (medication) , nanoparticle , buffer (optical fiber) , electrode , composite material , nanotechnology , chemistry , medicine , telecommunications , botany , organic chemistry , computer science , engineering , biology , endocrinology
High‐capacity SiO 2 /C composites with uniform distribution, rice husks (RHs) as raw materials, were scalably prepared by the ball milling method. Based on a fact that the porous SiO 2 nanoparticles and carbon in RHs possess natural properties, ball mill could visibly decrease grain sizes of clustering SiO 2 particles and C blocks and then improve the dispersivity of the two components, finally forming desirable SiO 2 /C composite, which can generate more active sites for Li + storage as well as can effectively buffer the volume change during cycling. Therefore, SiO 2 /C composites, evaluated as anode for lithium ion batteries, exhibited an excellent electrochemical performance, especially the highly reversible capacity of 827 mA h g −1 over 300 cycles at 100 mA g −1 and 530 mA h g −1 at the large rate of 500 mA g −1 , which suggests that the facile ball mill with environmental friendliness and large‐scale preparation may be available for electrode materials derived from biomass.