Premium
Pseudocapacitance‐Enhanced High‐Rate Lithium Storage in “Honeycomb”‐like Mn 2 O 3 Anodes
Author(s) -
Yuan Tianzhi,
Jiang Yinzhu,
Wang Qiuting,
Pan Bin,
Yan Mi
Publication year - 2017
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201600588
Subject(s) - pseudocapacitance , materials science , anode , lithium (medication) , supercapacitor , microstructure , chemical engineering , nanotechnology , electrode , capacitance , metallurgy , chemistry , medicine , engineering , endocrinology
Abstract The realization of high‐power lithium‐ion batteries (LIBs) is heavily hampered by intrinsically slow lithium diffusion within solid electrodes. Capacitive‐like lithium storage behavior observed in transition‐metal oxide (TMO)‐based anodes shed light on attaining battery‐like capacity and supercapacitor‐like rate performance simultaneously. Herein, “honeycomb”‐like Mn 2 O 3 films were successfully demonstrated as anodes for LIBs, in which the pseudocapacitive effect is strengthened upon cycling, resulting in a high‐rate lithium storage capability. Such pseudocapacitance originates from the unique porous structure and cycle‐induced microstructure evolution. The reticular Mn 2 O 3 can reach 1584.9 mAh g −1 over 250 cycles at 1 A g −1 , 1564.9 mAh g −1 after 500 cycles at 5 A −1 , and 475.6 mAh g −1 at 15 A g −1 .