Premium
MnO 2 Nanosheet‐Assembled Hollow Polyhedron Grown on Carbon Cloth for Flexible Aqueous Zinc‐Ion Batteries
Author(s) -
Wu Fangfang,
Gao Xiaobin,
Xu Xilian,
Jiang Yani,
Gao Xinlong,
Yin Ruilian,
Shi Wenhui,
Liu Wenxian,
Lu Gang,
Cao Xiehong
Publication year - 2020
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201903006
Subject(s) - nanosheet , materials science , cathode , aqueous solution , electrolyte , hydrothermal circulation , lithium (medication) , chemical engineering , carbon fibers , nanotechnology , flexibility (engineering) , electrode , composite material , electrical engineering , chemistry , medicine , statistics , mathematics , endocrinology , composite number , engineering
Abstract Aqueous zinc‐ion batteries (ZIBs) have been considered as prospective alternatives for lithium‐ion batteries, which are able to serve as power sources for next‐generation wearable and flexible devices, owing to the merits of abundant zinc resources and high safety of aqueous electrolyte. However, the lack of suitable cathode materials with flexibility for ZIBs hinders their further application. Herein, a novel cathode material [i.e., MnO 2 nanosheet‐assembled hollow polyhedron anchored on carbon cloth (MnO 2 /CC)] was prepared through a rapid hydrothermal method by using ZIF‐67 as self‐sacrificing template. When tested in an aqueous ZIB, the MnO 2 /CC delivered a high reversible capacity of 263.9 mAh g −1 at 1.0 A g −1 after 300 cycles, far exceeding those of the commercial MnO 2 electrode. More importantly, benefiting from the unique structural advantages, a flexible ZIB assembled based on the MnO 2 /CC displayed a stable output voltage of 1.53 V and a specific capacity of 91.7 mAh g −1 at 0.1 A g −1 after 30 cycles. It also successfully lit LED bulbs even under different bending angles, showing good flexibility. This research contributes to the development of MnO 2 ‐based cathode materials for high‐performance flexible ZIBs.