Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/107133
Title: High-performance asymmetric supercapacitors based on multilayer MnO2 graphene oxide nanoflakes and hierarchical porous carbon with enhanced cycling stability
Authors: Zhao, Yufeng
Ran, Wei
He, Jing
Huang, Yizhong
Liu, Zhifeng
Liu, Wei
Tang, Yongfu
Zhang, Long
Gao, Dawei
Gao, Faming
Keywords: DRNTU::Science::Chemistry::Physical chemistry::Electrochemistry
Issue Date: 2014
Source: Zhao, Y., Ran, W., He, J., Huang, Y., Liu, Z., Liu, W., et al. (2015). High-performance asymmetric supercapacitors based on multilayer MnO2 graphene oxide nanoflakes and hierarchical porous carbon with enhanced cycling stability. Small, 11(11), 1310-1319.
Series/Report no.: Small
Abstract: In this work, MnO2/GO (graphene oxide) composites with novel multilayer nanoflake structure, and a carbon material derived from Artemia cyst shell with genetic 3D hierarchical porous structure (HPC), are prepared. An asymmetric supercapacitor has been fabricated using MnO2/GO as positive electrode and HPC as negative electrode material. Because of their unique structures, both MnO2/GO composites and HPC exhibit excellent electrochemical performances. The optimized asymmetric supercapacitor could be cycled reversibly in the high voltage range of 0–2 V in aqueous electrolyte, which exhibits maximum energy density of 46.7 Wh kg−1 at a power density of 100 W kg−1 and remains 18.9 Wh kg−1 at 2000 W kg−1. Additionally, such device also shows superior long cycle life along with ∼100% capacitance retention after 1000 cycles and ∼93% after 4000 cycles.
URI: https://hdl.handle.net/10356/107133
http://hdl.handle.net/10220/25360
ISSN: 1613-6810
DOI: 10.1002/smll.201401922
Rights: © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:MSE Journal Articles

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