Open AccessMonocrystalline silicon nanowires and nanosheets as anodes of lithium‐ion battery: synthesis in mass production and low cost
Author(s) -
Wang Qi,
Chen ZhaoHui,
Xing LiLi
Publication year - 2013
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2013.0123
Subject(s) - monocrystalline silicon , anode , silicon , materials science , nanowire , lithium (medication) , nanowire battery , nanotechnology , lithium ion battery , battery (electricity) , etching (microfabrication) , chemical engineering , optoelectronics , lithium vanadium phosphate battery , chemistry , electrode , medicine , power (physics) , physics , engineering , endocrinology , quantum mechanics , layer (electronics)
Monocrystalline silicon nanowires and nanosheets are prepared in mass production by the novel electroless etching method. Low‐cost silicon powders are used as precursors. The initial capacities of silicon nanowires and nanosheets as lithium‐ion battery (LIB) anodes are up to 4311 and 4426 mAh/g, respectively. After ten cycles, the reversible capacity maintains 2318 and 2791 mAh/g for nanowires and nanosheets, respectively. The capacity and cyclability of nanosheets is slightly higher than that of nanowires. Such a behaviour is attributed to their finite lateral sizes and enhanced open‐edges, which can facilitate Li ion diffusion and decrease overvoltage associated with Li–Si alloying reaction. The presented results open a way for synthesising silicon nanostructures as LIB anodes in mass production and low cost.