期刊
DALTON TRANSACTIONS
卷 51, 期 41, 页码 16017-16026出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2dt02359h
关键词
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资金
- Open Fund Project of the Jiangsu Province Intelligent Photoelectric Devices and Measurement and Control Engineering Research Center
In this study, a unique bimetallic phosphide, NiCoP, with a hollow microcube structure, was synthesized and demonstrated as an excellent electrode material for supercapacitors, showing high capacity, superior cycling performance, and high specific energy.
Transition bimetallic phosphides with optimal composition and morphology are efficient electrocapacitive materials for asymmetric supercapacitors (ASCs). Herein, a unique bimetallic phosphide, NiCoP, with a hollow microcube structure, was synthesized by a sacrificial template method followed by phosphorization calcination. Impressively, the resulting nanosheet-based NiCoP hollow microcube (NiCoP-HMC) electrode exhibits a remarkable specific capacity of 1088.9 C g(-1) at 1 A g(-1) and superior cycling performance (the capacity remains 90.2% after cycling for 10 000 cycles at 6 A g(-1)), owing to its unique morphology, the superiority of bimetallic phosphides, and its battery type feature. Furthermore, an ASC was fabricated by using the obtained NiCoP-HMCs as the positive electrode and using active carbon (AC) as the negative electrode. The assembled ASC device delivers a high specific energy of 78.2 W h kg(-1) at a specific power of 799.9 W kg(-1) and has 84.8% capacity retention over 10 000 cycles at 8 A g(-1), demonstrating its great potential for applications in the field of high-capacity supercapacitors. These results illustrate NiCoP-HMCs as promising positive electrode materials for supercapacitors.
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