Design of nickel cobalt molybdate regulated by boronizing for high-performance supercapacitor applications. Issue 34 (25th August 2020)

• Record Type: Journal Article
• Authors: Zhao, Gang; Chen, Yumeng; Sun, Pengxiao; Hao, Shuhua; Wang, Xiaoke; Qu, Guangmeng; Xing, Yupeng; Xu, Xijin
• Is Part Of: Nanoscale. Volume 12:Issue 34(2020)
• Page Start: 17849
• Page End: 17857
• Publication Date: 2020-08-25
• Subjects: Nanoscience -- Periodicals; Nanotechnology -- Periodicals; 620.505
• DOI: 10.1039/d0nr05377e
• Languages: English
• ISSNs: 2040-3364

Abstract

Abstract : Here, we have successfully synthesized hierarchical structure by boronizing Ni x Co y MoO4 nanosheets. Benefitting from the synergistic effect among Ni3 B, Ni(BO2 )2 and Ni x Co y MoO4 in hybrid architectures, the electrode material possesses higher energy storage performance. Abstract : Nickel–cobalt-based molybdates have been intensively investigated because of their high theoretical specific capacitance and multifarious oxidation states. Here, we have successfully synthesized hierarchical structures (Ni3 B/Ni(BO2 )2 @Ni x Co y MoO4 ) by boronizing Ni x Co y MoO4 nanosheets on flexible carbon cloth substrates. Benefitting from the synergistic effect among Ni3 B, Ni(BO2 )2 and Ni x Co y MoO4 in hybrid architectures, the electrode material possesses higher capacity of 394.7 mA h g −1 at 1 A g −1 and a good rate performance (309.5 mA h g −1 maintained at 20 A g −1 ). Then, a hybrid supercapacitor assembled with Ni3 B/Ni(BO2 )2 @Ni x Co y MoO4 and activated carbon as the positive and the negative electrode, displays a high specific capacitance of 370.7 F g −1 at 1 A g −1 (210 F g −1 at 10 A g −1 ), a high voltage of 1.7 V, and a high energy density of 131.8 W h kg −1 at the power density of 800 W kg −1 (still 74.7 W h kg −1 maintained at 8000 W kg −1 ). This study widens the research scope of boronizing pseudocapacitance materials and reveals a high application potential of Ni3 B/Ni(BO2 )2 @Ni x Co y MoO4 for energy storage devices in the future.