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Hard Carbon Microspheres: Potassium‐Ion Anode Versus Sodium‐Ion Anode
Author(s) -
Jian Zelang,
Xing Zhenyu,
Bommier Clement,
Li Zhifei,
Ji Xiulei
Publication year - 2016
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.201501874
Subject(s) - anode , ion , sodium , materials science , potassium , microsphere , carbon fibers , diffusion , chemical engineering , nanotechnology , chemistry , organic chemistry , physics , thermodynamics , metallurgy , composite material , engineering , electrode , composite number
Hard carbon microspheres (HCS) exhibit a highly reversible capacity of 262 mAh g −1 for K‐ion batteries. They present a superior rate capability for K‐ions to Na‐ions, where at 2C, HCS/K cells deliver 190 mAh g −1 in contrast to 97 mAh g −1 from HCS/Na cells. It is determined that the K‐ion diffusion coefficient of HCS is higher than that of Na‐ions.