期刊
ACS APPLIED MATERIALS & INTERFACES
卷 12, 期 8, 页码 9158-9168出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b17038
关键词
quaternary phosphide; metal-rich phosphides; nanowire arrays; binder-free electrode; aqueous asymmetric supercapacitor
资金
- National Key Research and Development Program of China [2017YFA0402902]
- National Natural Science Foundation Committee of China Academy of Engineering Physics (NSAF) [U1630108]
- USTC Center for Micro and Nanoscale Research and Fabrication
Developing multicomponengt transition-metal phosphides has become an efficient way to improve the capacitive performance of single-component transition-metal phosphides. However, reports on quaternary phosphides for supercapacitor applications are still scarce. Here, we report high capacity and energy density of Zn-Ni-Co-P quaternary phosphide nanowire arrays on nickel foam (ZNCP-NF) composed of highly conductive metal-rich phosphides as an advanced binder-free electrode in aqueous asymmetric supercapacitors. In a three-electrode system using the new electrode, a high specific capacity of 1111 C g(-1) was obtained at a current density of 10 A g(-1). Analysis of this aqueous asymmetric supercapacitor with ZNCP-NF as the positive electrode and commercial activated carbon as the negative electrode reveals a high energy density (37.59 Wh kg(-1) at a power density of 856.52 W kg(-1)) and an outstanding cycling performance (capacity retention of 92.68% after 10 000 cycles at 2 A g(-1)). Our results open a path for a new design of advanced electrode material for supercapacitors.
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