title: NiCoP Nanoarray: A Superior Pseudocapacitor Electrode with High Areal Capacitance.
abstract: 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 F cm-2at 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 mWh cm-2at a power density of 1.6 mW cm-2with 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 electro- lyzer using NiCoP/NF as both cathode and anode for hydrogen production.
authors.affiliation: College of Materials Science and Engineering, Sichuan University, Chengdu, 610065, Sichuan, P. R. China.|College of Chemistry, Sichuan University, Chengdu, 610064, Sichuan, P. R. China.
authors.forename: Menglai
authors.initials: M
authors.lastname: Kong
authors.affiliation: College of Chemistry, Sichuan University, Chengdu, 610064, Sichuan, P. R. China.
authors.forename: Zao
authors.initials: Z
authors.lastname: Wang
authors.affiliation: College of Materials Science and Engineering, Sichuan University, Chengdu, 610065, Sichuan, P. R. China.|College of Chemistry, Sichuan University, Chengdu, 610064, Sichuan, P. R. China.
authors.forename: Weiyi
authors.initials: W
authors.lastname: Wang
authors.affiliation: College of Materials Science and Engineering, Sichuan University, Chengdu, 610065, Sichuan, P. R. China.|College of Chemistry, Sichuan University, Chengdu, 610064, Sichuan, P. R. China.
authors.forename: Min
authors.initials: M
authors.lastname: Ma
authors.affiliation: College of Chemistry, Sichuan University, Chengdu, 610064, Sichuan, P. R. China.
authors.forename: Danni
authors.initials: D
authors.lastname: Liu
authors.affiliation: College of Chemistry, Sichuan University, Chengdu, 610064, Sichuan, P. R. China.
authors.forename: Shuai
authors.initials: S
authors.lastname: Hao
authors.affiliation: College of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, 273165, Shandong, P. R. China.
authors.forename: Rongmei
authors.initials: R
authors.lastname: Kong
authors.affiliation: Chengdu Institute of Geology and Mineral Resources, Chengdu, 610081, Sichuan, P. R. China.
authors.forename: Gu
authors.initials: G
authors.lastname: Du
authors.affiliation: Chemistry Department, King Abdulaziz University, Jeddah, 21589, Saudi Arabia.
authors.forename: Abdullah M
authors.initials: AM
authors.lastname: Asiri
authors.affiliation: College of Materials Science and Engineering, Sichuan University, Chengdu, 610065, Sichuan, P. R. China.
authors.forename: Yadong
authors.initials: Y
authors.lastname: Yao
authors.affiliation: College of Chemistry, Sichuan University, Chengdu, 610064, Sichuan, P. R. China.
authors.forename: Xuping
authors.identifier: http://orcid.org/0000-0001-5034-1135
authors.initials: X
authors.lastname: Sun
keywords: NiCoP nanoarray; electrochemistry; high areal capacitance; multifunctional; supercapacitors