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Mesoporous Amorphous Silicon: A Simple Synthesis of a High‐Rate and Long‐Life Anode Material for Lithium‐Ion Batteries
Author(s) -
Lin Liangdong,
Xu Xuena,
Chu Chenxiao,
Majeed Muhammad K.,
Yang Jian
Publication year - 2016
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201608146
Subject(s) - anode , materials science , mesoporous material , amorphous solid , lithium (medication) , electrochemistry , chemical engineering , porosity , silicon , porous silicon , nanotechnology , ion , reagent , lithium ion battery , electrode , composite material , battery (electricity) , metallurgy , chemistry , catalysis , organic chemistry , medicine , engineering , endocrinology , power (physics) , physics , quantum mechanics
Amorphous Si (a‐Si) shows potential advantages over crystalline Si (c‐Si) in lithium‐ion batteries, owing to its high lithiation potential and good tolerance to intrinsic strain/stress. Herein, porous a‐Si has been synthesized by a simple process, without the uses of dangerous or expensive reagents, sophisticated equipment, and strong acids that potential cause environment risks. These porous a‐Si particles exhibit excellent electrochemical performances, owing to their porous structure, amorphous nature, and surface modification. They deliver a capacity of 1025 mAh g −1 at 3 A g −1 after 700 cycles. Moreover, the reversible capacity after electrochemical activation, is quite stable throughout the cycling, resulting in a capacity retention about around 88 %. The direct comparison between a‐Si and c‐Si anodes clearly supports the advantages of a‐Si in lithium‐ion batteries.