Premium
An Amorphous/Crystalline Incorporated Si/SiO x Anode Material Derived from Biomass Corn Leaves for Lithium‐Ion Batteries
Author(s) -
Su Anyu,
Li Jian,
Dong Jiajun,
Yang Di,
Chen Gang,
Wei Yingjin
Publication year - 2020
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.202001714
Subject(s) - anode , materials science , fabrication , amorphous solid , electrochemistry , porosity , chemical engineering , silicon , lithium (medication) , raw material , current density , cathode , electrode , nanotechnology , composite material , metallurgy , chemistry , organic chemistry , medicine , alternative medicine , physics , pathology , quantum mechanics , engineering , endocrinology
The fabrication of silicon (Si) anode materials derived from high silica‐containing plants enables effective utilization of subsidiary agricultural products. However, the electrochemical performances of synthesized Si materials still require improvement and thus need further structural design and morphology modifications, which inevitably increase preparation time and economic cost. Here, the conversion of corn leaves into Si anode materials is reported via a simple aluminothermic reduction reaction without other modifications. The obtained Si material inherits the structural characteristics of the natural corn leaf template and has many inherent advantages, such as high porosity, amorphous/crystalline mixture structure, and high‐valence SiO x residuals, which significantly enhance the material's structural stability and electrode adhesive strength, resulting in superior electrochemical performances. Rate capability tests show that the material delivers a high capacity of 1200 mA h g −1 at 8 A g −1 current density. After 300 cycles at 0.5 A g −1 , the material maintains a high specific capacity of 2100 mA h g −1 , with nearly 100% capacity retention during long‐term cycling. This study provides an economical route for the industrial production of Si anode materials for Lithium‐Ion batteries.