TY  - JOUR
PY  - 2019//
TI  - Phase control on surface for the stabilization of high energy cathode materials of lithium ion batteries
JO  - Journal of the American Chemical Society
A1  - Piao, Jun-Yu
A1  - Gu, Lin
A1  - Wei, Zengxi
A1  - Ma, Jianmin
A1  - Wu, Jinpeng
A1  - Yang, Wanli
A1  - Gong, Yue
A1  - Sun, Yong-Gang
A1  - Duan, Shu-Yi
A1  - Tao, Xian-Sen
A1  - Bin, De-Shan
A1  - Cao, Anmin
A1  - Wan, Li-Jun
SP  - 4900
EP  - 4907
VL  - 141
IS  - 12
N2  - The development of high energy electrode materials for lithium ion batteries is challenged by their inherent instabilities, which become more aggravated as the energy densities continue to climb, accordingly causing increasing concerns on battery safety and reliability. Here, taking the high voltage cathode of LiNi<sub>0.5</sub>Mn<sub>1.5</sub>O<sub>4</sub> as an example, we demonstrate a protocol to stabilize this cathode through a systematic phase modulating on its particle surface. We are able to transfer the spinel surface into a 30 nm shell composed of two functional phases including a rock-salt one and a layered one. The former is electrochemically inert for surface stabilization while the latter is designated to provide necessary electrochemical activity. The precise synthesis control enables us to tune the ratio of these two phases, and achieve an optimized balance between improved stability against structural degradation without sacrificing its capacity. This study highlights the critical importance of well-tailored surface phase property for the cathode stabilization of high energy lithium ion batteries.<p />  <p>Language: en</p>
LA  - en
SN  - 0002-7863
UR  - http://dx.doi.org/10.1021/jacs.8b13438
ID  - ref1
ER  -