Premium
Copper‐Doped Dual Phase Li 4 Ti 5 O 12 –TiO 2 Nanosheets as High‐Rate and Long Cycle Life Anodes for High‐Power Lithium‐Ion Batteries
Author(s) -
Chen Chengcheng,
Huang Yanan,
An Cuihua,
Zhang Hao,
Wang Yijing,
Jiao Lifang,
Yuan Huatang
Publication year - 2015
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201402886
Subject(s) - anode , doping , materials science , electrochemistry , lithium (medication) , copper , phase (matter) , electrical resistivity and conductivity , chemical engineering , analytical chemistry (journal) , nanotechnology , metallurgy , electrode , optoelectronics , chemistry , environmental chemistry , electrical engineering , medicine , organic chemistry , engineering , endocrinology
Cu‐doped Li 4 Ti 5 O 12 –TiO 2 nanosheets were synthesized by a facile, cheap, and environmentally friendly solution‐based method. These nanostructures were investigated as an anode material for lithium‐ion batteries. Cu doping was found to enhance the electron conductivity of the materials, and the amount of Cu doped controlled the crystal structure and content of TiO 2 . In addition, the samples, which benefit from multiphases and doping, exhibited much improved capacity, cycle performance, and high rate capability over Cu‐free Li 4 Ti 5 O 12 –TiO 2 . The discharge capacity of the 0.05 Cu‐doped sample was 190 mAh g −1 at 1C, and even 144 mAh g −1 was obtained at 30C after 100 cycles. Moreover, after 500 cycles at 30C, the discharge capacity remained at approximately 130 mAh g −1 . The excellent electrochemical performance of the cell demonstrated that Cu‐doping was able to adjust and control the Li 4 Ti 5 O 12 –TiO 2 system appropriately.