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A Versatile Polymeric Precursor to High‐Performance Silicon Composite Anode for Lithium‐Ion Batteries
Author(s) -
Yang Kai,
Yu Zhihao,
Yu Changcheng,
Zhu Min,
Yang Luyi,
Chen Haibiao,
Pan Feng
Publication year - 2019
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201900239
Subject(s) - anode , materials science , composite number , silicon , chemical engineering , lithium (medication) , pyrolysis , microstructure , composite material , electrode , chemistry , metallurgy , medicine , engineering , endocrinology
Silicon is a promising anode material for lithium‐ion batteries due to its very high theoretical capacity. Herein, a Si/SiO x @C composite anode is prepared from a polymeric precursor, and the performance of the anode is optimized by controlling the composition of the polymeric precursor. The precursor is produced by cross‐linking divinyl benzene (DVB) and polymethylhydrosiloxane (PMHS). Silicon nanoparticles are formed from the precursor via a molten‐salt reduction process, and a conductive SiO x @C matrix is produced through a subsequent pyrolysis process. As the ratio between DVB and PMHS is adjusted to 2:1, the specific capacity and rate performances of the resulting Si/SiO x @C composite reach the optima. Both the composition and the microstructure of the composite are affected by the composition of the precursor, and, in turn, they determine the performance of the composite anode.