Shape-Controlled Synthesis of Co2P Nanostructures and Their Application in Supercapacitors

ACS Applied Materials & Interfaces
Xiaojuan ChenRongming Wang

Abstract

Co2P nanostructures with rod-like and flower-like morphologies have been synthesized by controlling the decomposition process of Co(acac)3 in oleylamine system with triphenylphosphine as phosphorus source. Investigations indicate that the final morphologies of the products are determined by their peculiar phosphating processes. Electrochemical measurements manifest that the Co2P nanostructures exhibit excellent morphology-dependent supercapacitor properties. Compared with that of 284 F g(-1) at a current density of 1 A g(-1) for Co2P nanorods, the capacitance for Co2P nanoflowers reaches 416 F g(-1) at the same current density. Furthermore, an optimized asymmetric supercapacitor by using Co2P nanoflowers as anode and graphene as cathode is fabricated. It can deliver a high energy density of 8.8 Wh kg(-1) (at a high power density of 6 kW kg(-1)) and good cycling stability with over 97% specific capacitance remained after 6000 cycles, which makes the Co2P nanostructures potential applications in energy storage/conversion systems. This study paves the way to explore a new class of cobalt phosphide-based materials for supercapacitor applications.

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Citations

May 13, 2017·ACS Applied Materials & Interfaces·Xiaojuan ChenHongzhou Zhang
Jun 19, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Zhigang JiangJinhua Chen
Jan 3, 2020·Dalton Transactions : an International Journal of Inorganic Chemistry·Vijayakumar ElayappanHaigun Lee
Oct 10, 2018·Dalton Transactions : an International Journal of Inorganic Chemistry·Xiuling OuBaochang Cheng
Jul 6, 2017·Dalton Transactions : an International Journal of Inorganic Chemistry·Ming ChengRongming Wang
Oct 8, 2020·Dalton Transactions : an International Journal of Inorganic Chemistry·Iqra RabaniSupriya A Patil
Jun 7, 2018·ACS Applied Materials & Interfaces·Hong-Bo HuangYu-Chun Zhai
Jun 28, 2019·ACS Applied Materials & Interfaces·Nan LiXia Tao
Aug 14, 2021·Journal of Colloid and Interface Science·Xiancheng ShiYihe Zhang
Sep 29, 2017·ACS Applied Materials & Interfaces·Tian ChenGuojia Fang

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