文献类型：期刊文献

英文题名：Oxygen-vacancy and phosphorus-doping enriched NiMoO4 nanoarrays for high-energy supercapacitors

作者：Zhu, Zhengju[1];Zang, Ling[2];Chu, Mingshan[1];He, Ying[1];Ren, Dayong[3];Saha, Petr[4];Cheng, Qilin[1,4]

机构：[1]East China Univ Sci & Technol, Shanghai Engn Res Ctr Hierarch Nanomat, Sch Mat Sci & Engn, Key Lab Ultrafine Mat,Minist Educ, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Resources & Environm Engn, Shanghai 200237, Peoples R China;[3]Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China;[4]Tomas Bata Univ Zlin, Sino EU Joint Lab New Energy Mat & Devices, Nam TG Masaryka 5555, Zlin 76001, Czech Republic

年份：2022

卷号：54

外文期刊名：JOURNAL OF ENERGY STORAGE

收录：;EI(收录号：20223012405385);WOS:【SCI-EXPANDED(收录号:WOS:000861690500008)】；

基金：This work was supported by the National Natural Science Foundation of China (22075082) ; China Postdoctoral Science Foundation (2020M681208) ; International Cooperation Project of Shanghai Municipal Science and Technology Commission (18520744400) , Shanghai Pujiang Program (21PJD018) , and the Czech Ministry of Ed-ucation, Youth and Sports INTER-EXCELLENCE programme under the grant agreement No. LTT20005.

语种：英文

外文关键词：Oxygen vacancy; NiMoO4; Phosphorus doping; N-2 plasma; Supercapacitor

摘要：Exploring electrode materials with high effective surface and abundant active sites takes on a critical significance in achieving high-energy supercapacitors. Herein, the oxygen vacancies (Ov) and P-doping enriched NiMoO4 nanosheet arrays were synthesized through the combination of phosphorization and N-2 plasma treatment. The combination strategy makes it possible to sharply increase and modulate the Ov content. The optimized P-NiMoO4-N-2 is found with the highest Ov content, and the capacitive activity is well consistent with the increase in the Ov content among all samples. As revealed by experimental results, rich Ov increases the electrochemically accessible active-sites while enhancing the intrinsic conductivity. Thus, the optimized P-NiMoO4-N-2 is enabled to reach a high capacity of 2180 F g(-1) at a current density of 1 A g(-1) and remains 83.9 % at 10 A g(-1) with high cycling stability. After being assembled with activated carbon as the negative electrode, the asymmetric supercapacitor exhibits a high energy density of 56.8 Wh kg(-1) at 0.75 kW kg(-1) and maintains 41.6 Wh kg(-1) at 15 kW kg(-1). This work may create a novel path to enrich and adjust Ov in metal oxides for high-capacity and high-power supercapacitors.