In situ formation of consubstantial NiCo2S4 nanorod arrays toward self-standing electrode for high activity supercapacitors and overall water splitting

In situ formation of consubstantial NiCo2S4 nanorod arrays toward self-standing electrode for high activity supercapacitors and overall water splitting

Developing high-efficiency, low-cost and environmental friendly electrode materials for both supercapacitors and overall water splitting are significant for renewable energy storage and conversion. Herein, we report a facile consubstantial growth strategy to fabricate subuliform NiCo2S4 nanorod arra...

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Bibliographic Details
Published in:Journal of power sources 2018-10, Vol.402, p.116-123
Main Authors: Li, Xian-Xia, Wang, Xiao-Tong, Xiao, Kang, Ouyang, Ting, Li, Nan, Liu, Zhao-Qing
Format: Article
Language:eng
Subjects:
NiCo2S4
Overall water splitting
Self-growing electrode
Supercapacitors
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Summary:Developing high-efficiency, low-cost and environmental friendly electrode materials for both supercapacitors and overall water splitting are significant for renewable energy storage and conversion. Herein, we report a facile consubstantial growth strategy to fabricate subuliform NiCo2S4 nanorod arrays electrode through an in situ growing process, utilizing self-sacrificial Ni foam as substrate and Ni resource. Benefitting from the unique structures, the subuliform NiCo2S4 nanorods can be directly serve as binder-free, trifunctional electrode for overall water splitting with excellent electrocatalytic activity (oxygen evolution reaction with low overpotential of 220 mV at 30 mA cm−2 and hydrogen evolution reaction with low overpotential of 222 mV at 30 mA cm−2) and also as a promising pseudocapacitance electrode with superior electrochemical performance and good stability (high areal capacitance of 8.85 F cm−2 at a current density of 10 mA cm−2 and 94.96% capacitive retention after 10000 cycles). The present work highlights the remarkable advantages of the self-sacrificial strategy for the design of high-performance multifunctional electrode materials. •The NiCo2S4 nanorod arrays are fabricated by an in situ hydrothermal process.•The integrated configuration of NiCo2S4 can greatly facilitate electron transfer.•The obtained NiCo2S4 electrode exhibit excellent electrochemical performance.
ISSN:0378-7753
1873-2755