Construction of Hierarchical Ni(OH)₂@CoMoO₄ Nanoflake Composite for High-Performance Supercapacitors

Abstract

Hierarchical Ni(OH) 2 @CoMoO 4 nano°ake composite on Ni foam was successfully constructed by electrodepositing Ni(OH) 2 onto CoMoO 4 nano°ake and investigated as binder-free electrodes for supercapacitor. The composite shows a large areal capacitance of 5.23 F cm À2 at current density of 8 mA cm À1 , and a capacitance retention of 82.5% after 1000 cycles. The high electrochemical performances can be attributed to the hierarchical nano°akes structure and the synergetic e®ect between Ni(OH) 2 nanosheets and CoMoO 4 nano°akes. This work demonstrates that Ni (OH) 2 @CoMoO 4 nano°ake composite is highly desirable for application as advanced electrochemical electrode material.

High-Performance Ternary NiCoMo Electrocatalyst with Three-Dimensional Nanosheets Array Structure

“…The crystal structure of the samples was studied by X-ray diffraction. As shown in Figure 2 , there are obvious diffraction peaks in the sample of the supported catalyst, and the diffraction peaks correspond to Ni(OH) 2 (JCPDF No.03-0177), NiMo 4 ·xH 2 O (JCPDF No.13-0128) and CoMoO 4 (JCPDF No.21-0868) [ 28 , 29 ], respectively. So, the NiCoMo-LDH catalyst was successfully prepared and loaded onto the NF substrate.…”

Boosting the energy storage performance of cobalt molybdate microspheres constructed from urotropin‐induced ultrathin nanosheets

“…As previously mentioned, the prepared CoMoO 4 is in the form of nanosheets. Because of this, some crumples appear in the CoMoO 4 nanosheets, which are owing to the good flexibility, large specific surface area, and interconnected nanosheet structure . These features are in good agreement with the above SEM results.…”

Template-assisted synthesis of NiCoO2 nanocages/reduced graphene oxide composites as high-performance electrodes for supercapacitors

“…Electrochemical capacitors (ECs), also called supercapacitors, a new energy storage system, have great potential as next generation energy storage systems, due to their outstanding electrochemical performance including high specic capacitance, high power density, good rate capability and excellent cycling stability. 1,2 Supercapacitors have been successfully utilized in many elds including communication, transportation, electronics, and aviation, and have considerable application prospects. 3,4 Based on different energy storage mechanisms, ECs are classied into two categories: doublelayer capacitors (DLC) and pseudocapacitors (PC).…”