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Silicon–Carbon Nanotube Coaxial Sponge as Li‐Ion Anodes with High Areal Capacity
Author(s) -
Hu Liangbing,
Wu Hui,
Gao Yifan,
Cao Anyuan,
Li Hongbian,
McDough James,
Xie Xing,
Zhou Min,
Cui Yi
Publication year - 2011
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201100056
Subject(s) - anode , materials science , coaxial , silicon , ion , nanotechnology , electrical conductor , nanopore , carbon nanotube , carbon fibers , optoelectronics , composite material , electrode , computer science , telecommunications , chemistry , physics , quantum mechanics , composite number
Highly porous, conductive Si‐CNT sponge‐like structures with a large areal mass loading are demonstrated as effective Li‐ion battery anode materials. Nanopore formation and growth in the Si shell has been identified as the primary failure mode of the Si‐CNT sponge anode, and the formation of such nanopores can be minimized by tuning the cutoff voltages. In conjunction with experiments, a theoretical analysis was carried out to explain the pore formation mechanism.