NiCoP Nanoarray: A Superior Pseudocapacitor Electrode with High Areal Capacitance

作者：Kong, Menglai; Wang, Zao; Wang, Weiyi; Ma, Min; Liu, Danni; Hao, Shuai; Kong, Rongmei; Du, Gu; Asiri, Abdullah M.; Yao, Yadong^*; Sun, Xuping^*

来源：Chemistry - A European Journal, 2017, 23(18): 4435-4441.

DOI：10.1002/chem.201700017

• electrochemistry
• high areal capacitance
• multifunctional
• NiCoP nanoarray
• supercapacitors

High-performance supercapacitors require the design and development of electrode materials with high conductivity and a large electrolyte-accessible surface area. Here, the use of a conductive NiCoP nanoarray on nickel foam (NiCoP/NF) as a superior pseudocapacitor electrode is demonstrated. This 3D electrode exhibits high areal capacitances of 9.2 and 5.97 Fcm(-2) at current densities of 2 and 50 mA cm(-2), respectively, with good rate capability and cycling stability. The asymmetric supercapacitor (ASC) device assembled using NiCoP/NF as positive electrode and active carbon as negative electrode delivers a high energy density of 1.16 m Wh cm(-2) at a power density of 1.6 mW cm(-2) with 72% retention of its initial specific capacitance after 2000 cycles at 50 mA cm(-2). The practical use is further demonstrated with two such ASC devices in series to light six LED indicators and also to drive an alkaline water electrolyzer using NiCoP/NF as both cathode and anode for hydrogen production.

• 出版日期2017-3-28
• 单位四川大学; 曲阜师范大学; 成都地质矿产研究所