Improving the specific capacity of nickel hydroxide nanocrystals via yttrium doping for application in hybrid supercapacitors. Issue 27 (18th June 2019)

• Record Type: Journal Article
• Authors: Zhu, Yuanyi; An, Shengli; Cui, Jinlong; Qiu, Hengrui; Sun, Xuejiao; Zhang, Yongqiang; He, Wenxiu
• Is Part Of: CrystEngComm. Volume 21:Issue 27(2019)
• Page Start: 4079
• Page End: 4084
• Publication Date: 2019-06-18
• Subjects: Crystals -- Periodicals; Crystal growth -- Periodicals; Crystallography -- Periodicals; Cristaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Cristallographie -- Périodiques; 548
• DOI: 10.1039/c9ce00625g
• Languages: English
• ISSNs: 1466-8033

Abstract

Abstract : Herein, Y-doped Ni(OH)2 composites were successfully fabricated via a simple hydrothermal process. Abstract : Herein, Y-doped Ni(OH)2 composites were successfully fabricated via a simple hydrothermal process. The specific surface areas were significantly improved when Y 3+ ions were incorporated into the Ni hydroxide lattice. The Y-doped Ni(OH)2 electrode exhibited the remarkable specific capacity of 735.46 C g −1 at 1.5 A g −1 and ultrahigh rate performance with 71.36% capacity retention at 20 A g −1 . The optimum Y-doped Ni(OH)2 electrodes were further evaluated for application in an asymmetric supercapacitor, demonstrating the maximum energy density of 55.49 W h kg −1 at the power density of 843.31 W kg −1 as well as satisfying cycling performance with 85.8% retention after 7000 cycles.