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Journal of Nanomaterials
Volume 2017 (2017), Article ID 9728591, 8 pages
https://doi.org/10.1155/2017/9728591
Research Article

Liquid Phase Synthesis of CoP Nanoparticles with High Electrical Conductivity for Advanced Energy Storage

1State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China
2School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China
3College of Civil Engineering, Lanzhou Institute of Technology, Lanzhou 730050, China

Correspondence should be addressed to Mao-Cheng Liu

Received 2 June 2017; Revised 21 August 2017; Accepted 5 September 2017; Published 9 October 2017

Academic Editor: Syam Sundar

Copyright © 2017 Guo-Qun Zhang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Transition metal phosphide alloys possess the metalloid characteristics and superior electrical conductivity and are a kind of high electrical conductive pseudocapacitive materials. Herein, high electrical conductive cobalt phosphide alloys are fabricated through a liquid phase process and a nanoparticles structure with high surface area is obtained. The highest specific capacitance of 286 F g−1 is reached at a current density of 0.5 A g−1. 63.4% of the specific capacitance is retained when the current density increased 16 times and 98.5% of the specific capacitance is maintained after 5000 cycles. The AC//CoP asymmetric supercapacitor also shows a high energy density (21.3 Wh kg−1) and excellent stability (97.8% of the specific capacitance is retained after 5000 cycles). The study provides a new strategy for the construction of high-performance energy storage materials by enhancing their intrinsic electrical conductivity.