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Simplified Synthesis of Biomass‐Derived Si/C Composites as Stable Anode Materials for Lithium‐Ion Batteries
Author(s) -
Majeed Muhammad K.,
Saleem Adil,
Wang Chunsheng,
Song Chunhua,
Yang Jian
Publication year - 2020
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.202000953
Subject(s) - calcination , anode , husk , materials science , biomass (ecology) , carbon fibers , silicon , lithium (medication) , chemical engineering , environmentally friendly , catalysis , composite material , chemistry , organic chemistry , metallurgy , composite number , electrode , medicine , ecology , botany , oceanography , endocrinology , engineering , biology , geology
Synthesis of silicon/carbon (Si/C) composites from biomass resources could enable the effective utilization of agricultural products in the battery industry with economical as well as environmental benefits. Herein, a simplified process was developed to synthesize Si/C from biomass, by using a low‐cost agricultural byproduct “rice husk (RH)” as a model. This process includes the calcination of RH for SiO 2 /C and the reduction of SiO 2 /C by Al in molten salts at a moderate temperature. This process does not need the removal of carbon before thermal reduction of SiO 2 , which is thought to be necessary to avoid the formation of SiC at elevated temperatures. Thus, carbon derived from biomass can be directly used for Si/C composites for anode materials. The resultant Si/C shows a high reversible capacity of 1309 mAh g −1 and long cycle life (300 cycles). This research advocates a new and simplified strategy for the synthesis of RH‐based biomass‐derived Si/C, which is beneficial for low‐cost, environmentally friendly, and green energy storage applications.