@inproceedings{4a721f3ad4384395bf1bd9a8dd891189,
title = "Ex-situ activation of Li-excess layered cathode materials for high-capacity lithium ion batteries",
abstract = "Ex-situ activation of Li-excess layered cathode materials has been carried out via two-step ion-exchanges and a post-annealing process, resulting in a complete phase conversion from a Li-excess layered Li[Li0.2Mn0.54Ni0.13Co0.13]O2 to a Li4Mn5O12-type spinel product. The newly-formed spinel material delivers an initial discharge capacity of 313.6 mAh/g at 0.1C (1C = 250 mA/g), much higher than 211.3 mAh/g from pristine Li-excess layered cathode. It can also retain a specific capacity of 197.5 mAh/g at 1C after 100 electrochemical cycles. The ion-exchange promoted phase transition contributes to remarkably improved rate capability and cycling stability of Li-excess layered cathode materials. This work sheds light on fundamental understanding of phase transitions within Li-excess layered oxides and provides a novel route for tailoring electrochemical performance of Li-excess layered cathode materials for high-capacity lithium ion batteries.",
author = "Zhao, {J. Q.} and Huang, {R. M.} and He, {H. X.} and Y. Wang",
note = "Publisher Copyright: {\textcopyright} 2015 The Electrochemical Society.; Symposium on Lithium-Ion Batteries - 2014 ECS and SMEQ Joint International Meeting ; Conference date: 05-10-2014 Through 09-10-2014",
year = "2014",
doi = "10.1149/06422.0077ecst",
language = "American English",
series = "ECS Transactions",
publisher = "Electrochemical Society Inc.",
number = "22",
pages = "77--86",
editor = "S. Meng and K. Amine and J. Wu",
booktitle = "Lithium-Ion Batteries",
edition = "22",
}