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Ternary‐Phase Li 4 Ti 5 O 12 /TiO 2 Nanosheet Composite for High Rate Lithium‐Ion Batteries
Author(s) -
Zhuang Jingxiang,
Wang Ziye,
Zhang Jiangtao,
Lu Gang,
Kang Xiaohong,
Cheng Zhiming
Publication year - 2018
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.201700889
Subject(s) - nanosheet , materials science , crystallinity , ternary operation , hydrothermal circulation , composite number , chemical engineering , annealing (glass) , lithium (medication) , ternary compound , hydrothermal synthesis , nanotechnology , inorganic chemistry , composite material , chemistry , medicine , endocrinology , computer science , engineering , programming language
A ternary‐phase Li 4 Ti 5 O 12 /TiO 2 (LTO/TiO 2 ) nanosheet composite is successfully synthesized by a one‐pot hydrothermal method followed by two‐step annealing ways. It exhibits high specific capacities of 170 mAh g −1 , 154 mAh g −1 , 138.5 mAh g −1 , and 123.9 mAh g −1 at 1 C, 10 C, 30 C and 50 C, respectively. After 3000 cycles at 20 C, over 89.2 % original specific capacity retention is maintained with approximately 100 % columbic efficiency. The excellent rate performance and cycling stability are attributed to the high crystallinity, the thin nanosheets, the high surface area, and an appropriate amount of nanostructured TiO 2 seeds dispersed in the Li 4 Ti 5 O 12 (LTO) matrix for the final products.