Nickel/Cobalt Molybdate Hollow Rods Induced by Structure and Defect Engineering as Exceptional Electrode Materials for Hybrid Supercapacitor. Issue 32 (7th May 2021)

• Record Type: Journal Article
• Authors: Chu, Dawei; Zhao, Xun; Xiao, Boxin; Libanori, Alberto; Zhou, Yihao; Tan, Lichao; Ma, Huiyuan; Pang, Haijun; Wang, Xinming; Jiang, Yanxia; Chen, Jun
• Is Part Of: Chemistry. Volume 27:Issue 32(2021)
• Page Start: 8337
• Page End: 8343
• Publication Date: 2021-05-07
• Subjects: Hollow structure -- Oxygen defects -- Partial reduction -- Soft template -- Supercapacitor; Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.202100265
• Languages: English
• ISSNs: 0947-6539

Abstract

Abstract: Oxygen defects and hollow structures positively impact pseudocapacitive properties of diffusion/surface‐controlled processes, a component of critical importance when building high‐performance supercapacitors. Hence, we fabricated hollow nickel/cobalt molybdate rods with O‐defects (D−H−NiMoO4 @CoMoO4 ) through a soft‐template and partial reduction method, enhancing D−H−NiMoO4 @CoMoO4 's electrochemical performance, yielding a specific capacitance of 1329 F g −1, and demonstrating excellent durability with 95.8 % capacity retention after 3000 cycles. D−H−NiMoO4 @CoMoO4 was used as the positive electrode to construct an asymmetric supercapacitor, displaying an energy density of up to 34.13 Wh kg −1 and demonstrating good predisposition towards practical applications. This work presents an effective approach to fabricate and use hollow nickel/cobalt molybdate rods with O‐defects as pseudocapacitor material for high‐performance capacitive energy storage devices. Abstract : Hollow nickel/cobalt molybdate rods with O‐defects are engineered and prepared through a facile soft‐template combined with partial reduction methods. The electrode material shows exceptional specific capacitance of 1329 F g −1, and the capacitance retention of the D−H−NiMoO4 @CoMoO4 is about 95.8 % along with the cycle number of 3000. Besides, the as‐prepared D−H−NiMoO4 @CoMoO4 //AC exhibits an exceptional energy density (34.13 Wh kg −1 ).