Depolarization of Li‐rich Mn‐based oxide via electrochemically active Prussian blue interface providing superior rate capability
Youchen Hao,
Xifei Li,
Wen Liu,
Jingjing Wang,
Hui Shan,
Wenbin Li,
Xingjiang Liu,
Liangxu Lin,
Xianyou Wang,
Xueliang Sun
Affiliations
Youchen Hao
Shaanxi International Joint Research Centre of Surface Technology for Energy Storage Materials, Xi'an Key Laboratory of New Energy Materials and Devices, Institute of Advanced Electrochemical Energy & School of Materials Science and Engineering Xi'an University of Technology Xi'an China
Xifei Li
Shaanxi International Joint Research Centre of Surface Technology for Energy Storage Materials, Xi'an Key Laboratory of New Energy Materials and Devices, Institute of Advanced Electrochemical Energy & School of Materials Science and Engineering Xi'an University of Technology Xi'an China
Wen Liu
Shaanxi International Joint Research Centre of Surface Technology for Energy Storage Materials, Xi'an Key Laboratory of New Energy Materials and Devices, Institute of Advanced Electrochemical Energy & School of Materials Science and Engineering Xi'an University of Technology Xi'an China
Jingjing Wang
Shaanxi International Joint Research Centre of Surface Technology for Energy Storage Materials, Xi'an Key Laboratory of New Energy Materials and Devices, Institute of Advanced Electrochemical Energy & School of Materials Science and Engineering Xi'an University of Technology Xi'an China
Hui Shan
Shaanxi International Joint Research Centre of Surface Technology for Energy Storage Materials, Xi'an Key Laboratory of New Energy Materials and Devices, Institute of Advanced Electrochemical Energy & School of Materials Science and Engineering Xi'an University of Technology Xi'an China
Wenbin Li
Shaanxi International Joint Research Centre of Surface Technology for Energy Storage Materials, Xi'an Key Laboratory of New Energy Materials and Devices, Institute of Advanced Electrochemical Energy & School of Materials Science and Engineering Xi'an University of Technology Xi'an China
Xingjiang Liu
Science and Technology on Power Sources Laboratory Tianjin Institute of Power Sources Tianjin PR China
Liangxu Lin
Strait Institute of Flexible Electronics (SIFE, Future Technologies) Fujian Normal University Fuzhou Fuzhou China
Xianyou Wang
Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, School of Chemistry Xiangtan University Xiangtan Hunan China
Xueliang Sun
Department of Mechanical and Materials Engineering University of Western Ontario London Ontario Canada
Abstract The high‐rate cyclability of Li‐rich Mn‐based oxide (LMO) is highly limited by the electrochemical polarization resulting from the slow kinetic of the Li2MnO3 phase. Herein, the Prussian blue (PB) coating layer with specific redox potential is introduced as a functionalized interface to overcome the side effect and the escaping of O on the surface of LMO, especially its poor rate capability. In detail, the PB layer can restrict the large polarization of LMO by sharing overloaded current at a high rate due to the synchronous redox of PB and LMO. Consequently, an enhanced high rate performance with capacity retention of 87.8% over 300 cycles is obtained, which is superior to 50.5% of the pristine electrode. Such strategies on the high‐rate cyclability of Li‐rich Mn‐based oxide compatible with good low‐rate performances may attract great attention for pursuing durable performances.
