Unravelling the Role of Electrochemically Active FePO4 Coating by Atomic Layer Deposition for Increased High‐Voltage Stability of LiNi0.5Mn1.5O4 Cathode Material

Advanced Science

Biwei Xiao²  Jian Liu²  Qian Sun²  Biqiong Wang²  Mohammad Norouzi Banis²  Dong Zhao³  Zhiqiang Wang³  Ruying Li²  Xiaoyu Cui¹  Tsun-Kong Sham³ 

[1] Canadian Light Source, Saskatoon, SK, Canada;Department of Mechanical and Materials Engineering, University of Western Ontario, London, ON, Canada;Department of Chemistry, University of Western Ontario, London, ON, Canada

关键词: X‐ray absorption spectroscopy;    atomic layer deposition;    iron phosphate;    lithium‐ion batteries;    lithium nickel manganese oxide;   

DOI  :  10.1002/advs.201500022

来源: Wiley

【 摘 要 】

Abstract

Ultrathin amorphous FePO₄ coating derived by atomic layer deposition (ALD) is used to coat the 5 V LiNi_0.5Mn_1.5O₄ cathode material powders, which dramatically increases the capacity retention of LiNi_0.5Mn_1.5O₄. It is believed that the amorphous FePO₄ layer could act as a lithium-ions reservoir and electrochemically active buffer layer during the charge/discharge cycling, helping achieve high capacities in LiNi_0.5Mn_1.5O₄, especially at high current densities.

【 授权许可】

CC BY   
© 2015 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.