文献类型：期刊文献

英文题名：Optimizing the rate capability of nickel cobalt phosphide nanowires on graphene oxide by the outer/inter-component synergistic effects

作者：Jing, Chuan[1];Song, Xianyu[2];Li, Kailin[1];Zhang, Yumeng[3];Liu, Xiaoying[4];Dong, Biqin[5];Dong, Fan[6];Zhao, Shuangliang[2];Yao, Hongchang[7];Zhang, Yuxin[1]

机构：[1]Chongqing Univ, Coll Mat Sci & Engn, State Key Lab Mech Transmiss, Chongqing 400044, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem Engn, Shanghai Key Lab Multiphase Mat Chem Engn, Shanghai 200237, Peoples R China;[3]Chongqing Univ, Coll Art, Chongqing 400044, Peoples R China;[4]Chongqing Technol & Business Univ, Chongqing Key Lab Catalysis & New Environm Mat, Minist Educ, Engn Res Ctr Waste Oil Recovery Technol & Equipme, Chongqing 400067, Peoples R China;[5]Shenzhen Univ, Guangdong Prov Key Lab Durabil Marine Civil Engn, Shenzhen 518060, Peoples R China;[6]Univ Elect Sci & Technol China, Inst Fundamental & Frontier Sci, Res Ctr Environm Sci & Technol, Chengdu 611731, Peoples R China;[7]Zhengzhou Univ, Coll Chem & Mol Engn, Zhengzhou, Henan, Peoples R China

年份：2020

卷号：8

期号：4

起止页码：1697

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY A

收录：;EI(收录号：20200508109064);WOS:【SCI-EXPANDED(收录号:WOS:000511170800063)】；

基金：The authors gratefully acknowledge the.nancial support provided by the Graduate Research and innovation of Chongqing, China (Grant No. CYB18002), the National Natural Science Foundation of China (Grant No. 21576034 and 51908092), the State Education Ministry and Fundamental Research Funds for the Central Universities (2019CDQYCL042, 2019CDXYCL0031, 106112017CDJXSYY0001, 2018CDYJSY0055, 106112017CDJQJ138802, 106112017CDJSK04XK11, and 2018CDQYCL0027), the Joint Funds of the National Natural Science Foundation of China-Guangdong (Grant No. U1801254). The authors thank the Electron Microscopy Center, Analytical and Testing Center of Chongqing University for materials characterizations. The authors thank the Hitech water puri.cation system for instrument support.

语种：英文

外文关键词：Phosphorus compounds - Stability - Nanowires - Nickel compounds - Capacitance - Graphene - Electrochemical electrodes

摘要：Bimetallic phosphides have been identified as promising alternative electrode materials owing to their admirable conductivity and electrochemical activity. Nevertheless, the severe agglomeration of single-component bimetallic phosphides hinders their extensive applications. Moreover, current research lacks in-depth studies on the effect of outer/inter-component synergy on the rate capability. In this study, novel nickel cobalt phosphide nanowires on two-dimensional graphene oxide nanosheets (GO@NiCoP) were designed and prepared by combining a hydrothermal process and phosphorization. GO served as the conductive path to improve the composite conductivity and provided abundant oxygen-containing functional groups to coordinate with the metal cations of NiCoP, thereby boosting the overall structural stability. NiCoP possesses an optimal intercomponent synergistic effect, such as an optimal -OH- adsorption energy and deprotonation energy, leading to an enhanced potential of the electrochemical reaction. Taking advantage of these materials, the GO@NiCoP electrode displayed a high specific capacitance of 1125 F g(-1) (155 mA h g(-1)) at 2 A g(-1) and a high cycling stability of 104.88% capacitance retention after 5000 cycles at 30 A g(-1). Interestingly, the GO@NiCoP electrode delivered an exceptional rate capability of 84.09% capacitance retention at 20 A g(-1) and 39.77% capacitance retention at 60 A g(-1) owing to its stable structure and excellent conductivity. In addition, we fabricated a GO@NiCoP//AG ASC device that delivered a desirable energy density of 27.71 W h kg(-1) at 788 W kg(-1). To broaden its applications, a self-charging power system with a satisfactory lighting time was constructed using the ASC device. In short, the outstanding electrochemical performance of the electrode materials provides a novel perspective for enhancing the rate capacity of electrode materials by the outer/inter-component synergistic effect.