title: Wall-like hierarchical metal oxide nanosheet arrays grown on carbon cloth for excellent supercapacitor electrodes.
abstract: Recently, considerable efforts have been made to satisfy the future requirements of electrochemical energy storage using novel functional electrode materials. Binary transition metal oxides (BTMOs) possess multiple oxidation states that enable multiple redox reactions, showing higher supercapacitive properties than single component metal oxides. In this work, a facile hydrothermal method is provided for the synthesis of wall-like hierarchical metal oxide MMoO4 (M = Ni, Co) nanosheet arrays, which are directly grown on flexible carbon cloth for use as advanced binder-free electrodes for supercapacitors. By virtue of their intriguing structure, the resulted active material nanosheets with a high specific surface area can provide a large electroactive region, which could facilitate easy accession of electrolyte ions and fast charge transport, resulting in an enhanced electrochemical performance. Separately, the as-synthesized MMoO4 (M = Ni, Co) samples have exhibited superior specific capacitances (1483 F g(-1) of NiMoO4 and 452 F g(-1) of CoMoO4 at a current density of 2 A g(-1)), as well as excellent cycling stability (93.1% capacitance retention of NiMoO4 and 95.9% capacitance retention of CoMoO4 after 2000 cycles). The results show that the binder-free electrodes constructed by deposition of MMoO4 (M = Ni, Co) nanosheets on carbon cloth are promising candidates for the application of supercapacitors.
authors.affiliation: SZU-NUS Collaborative Innovation Center for Optoelectronic Science and Technology, Shenzhen Key Laboratory of Two-Dimensional Materials and Devices and Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, Shenzhen University, Shenzhen, P. R. China. hzhang@szu.edu.cn.
authors.forename: Zongyu
authors.initials: Z
authors.lastname: Huang
authors.forename: Zhen
authors.initials: Z
authors.lastname: Zhang
authors.forename: Xiang
authors.initials: X
authors.lastname: Qi
authors.forename: Xiaohui
authors.initials: X
authors.lastname: Ren
authors.forename: Guanghua
authors.initials: G
authors.lastname: Xu
authors.forename: Pengbo
authors.initials: P
authors.lastname: Wan
authors.forename: Xiaoming
authors.initials: X
authors.lastname: Sun
authors.forename: Han
authors.initials: H
authors.lastname: Zhang