Premium
Ultrathin LiV 2 O 4 Layers Modified LiNi 0.5 Co 0.2 Mn 0.3 O 2 Single‐Crystal Cathodes with Enhanced Activity and Stability
Author(s) -
Lu Yao,
Zeng Xifeng,
Wang Jun,
Yang Lishan,
Hu Shuai,
Jia Chuankun,
Zhao Haihong,
Yin Dulin,
Ge Xingbo,
Xi Xiaoming
Publication year - 2019
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.201901368
Subject(s) - materials science , cathode , lithium (medication) , electrochemistry , ternary operation , coating , manganese , chemical engineering , single crystal , cobalt , layer (electronics) , crystal (programming language) , analytical chemistry (journal) , inorganic chemistry , electrode , nanotechnology , crystallography , metallurgy , chemistry , medicine , chromatography , computer science , engineering , programming language , endocrinology
Nickel–cobalt–manganese ternary cathode materials for lithium‐ion batteries are prone to detrimental side reactions and deterioration performance at deep charge. Coating is one of the effective methods to boost electrochemical performance of materials. This work conducts an ultrathin LiV 2 O 4 layer on the single‐crystal LiNi 0.5 Co 0.2 Mn 0.3 O 2 (NCM523) particles and scrutinizes the optimal coating amount. It turns out that 0.3 wt% LiV 2 O 4 ‐modified NCM523 cathode achieves a reversible discharging capacity of 131.2 mAh g −1 after 100 cycles (3.0–4.5 V vs Li/Li + ), with a capacity retention of 80% (which is 50% higher than that of the pristine sample). The experimental data suggest that this lithium vanadate coating technique provides an innovative strategy to boost the performance of NCM cathodes.