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Hierarchically Micro‐/Nanostructured TiO 2 /Micron Carbon Fibers Composites for Long‐Life and Fast‐Charging Lithium‐Ion Batteries
Author(s) -
Wang Dongdong,
Zhang Guanghui,
Shan Zhongqiang,
Zhang Tianyong,
Tian Jianhua
Publication year - 2018
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201700946
Subject(s) - materials science , calcination , lithium (medication) , mesoporous material , nanotechnology , electrochemistry , lithium ion battery , nanometre , ion , micrometer , carbon fibers , composite material , battery (electricity) , electrode , composite number , catalysis , chemistry , medicine , biochemistry , power (physics) , physics , organic chemistry , quantum mechanics , endocrinology , optics
Long‐life lithium‐ion batteries require materials with well‐designed and controlled structures on nanometer and micrometer scales. Therefore, the hierarchically structured TiO 2 /micron carbon fibers composites (TiO 2 /MCFs) composed of well‐defined nanowires are fabricated through a straightforward impregnation‐calcination process. The unique features, including hierarchically mesoporous micro‐/nanostructures, large specific surface area, and high electrical conductivity endow the TiO 2 /MCFs with convenient lithium‐ion and electron diffusion channels and effective stress−strain relief during repeated electrochemical reaction process. As anticipated, TiO 2 /MCFs deliver an excellent cycling stability with 92 % capacity retention after 5000 cycles at high current density of 2000 mA g −1 , highlighting the great potential for long‐life and fast‐charging lithium‐ion batteries.