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MnO 2 Nanoflower Arrays with High Rate Capability for Flexible Supercapacitors
Author(s) -
Li Wenyao,
Xu Kaibing,
Li Bo,
Sun Jianqing,
Jiang Feiran,
Yu Zhishui,
Zou Rujia,
Chen Zhigang,
Hu Junqing
Publication year - 2014
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201400006
Subject(s) - nanoflower , supercapacitor , capacitance , materials science , nanotechnology , flexibility (engineering) , graphite , current density , electrochemistry , optoelectronics , nanostructure , electrode , chemistry , composite material , statistics , mathematics , physics , quantum mechanics
Large‐area α‐MnO 2 nanoflower arrays are synthesized by using a facile and template‐free electrochemical deposition on flexible graphite paper. These nanoflower arrays exhibit a high specific capacitance of 314 F g −1 at a current density of 1 A g −1 with remarkable rate capability (61.1 % retention at 40 A g −1 ) and excellent cycle stability. Furthermore, the fabricated flexible symmetric supercapacitor also displays good performance and flexibility.