Application of CoV-LDH nano-flower in asymmetric supercapacitors with high electrochemical properties. (10th March 2020)

• Record Type: Journal Article
• Authors: Liu, Na; Lin, Jianming; Wu, Jihuai; Huang, Miaoliang; Fan, Leqing; Song, Zeyu; Geng, Chenglong; Zhu, Tingting; Pan, Weichun
• Is Part Of: Electrochimica acta. Volume 336(2020)
• Publication Date: 2020-03-10
• Subjects: Asymmetric supercapacitor -- CoV-LDH electrode material -- Hydrothermal method; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2019.135550
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: In this project, a simple hydrothermal method was used to successfully prepare CoV-LDH electrode material on porous nickel foam, and characterized by XRD, SEM, TEM, FT-IR, BET and other methods. In a typical three-electrode system, CoV-3 achieves a high specific capacitance of 3540 F g −1 at 1 A g −1 and has a retention rate of 85.8% after 5000 cycles. An asymmetric supercapacitor (ASC) was assembled from CoV-3 as a positive electrode material and activated carbon (AC) as a negative electrode. The ASC has a specific capacitance of 114.13 F g −1 at the operating voltage of 0–1.6 V at 1 A g −1, and an energy density of 40.6 Wh·kg −1 at the power density of 800.4 W kg −1 . After 10, 000 cycles, the ASC has a capacitance retention rate of 87.5%. Highlights: In a typical three-electrode system, CoV-LDH achieves a high specific capacitance of 3540 F g −1 at 1 A g −1 . An energy density of 40.6 Wh·kg −1 at the power density of 800.4 W kg −1 for the asymmetric design A simple hydrothermal reaction is used to synthesize CoV-LDH electrode materials.