Facile construction of a MgCo₂O₄@NiMoO₄/NF core–shell nanocomposite for high-performance asymmetric supercapacitors

Abstract

Construction of a double urchin-like hierarchical MgCo2O4@NiMoO4 core–shell nanomaterial and its application in high-performance all-solid-state asymmetric supercapacitors.

Fluffy Cotton-Like GO/Zn–Co–Ni Layered Double Hydroxides Form from a Sacrificed Template GO/ZIF-8 for High Performance Asymmetric Supercapacitors

“…Nowadays, the increasing demands of various electronic products, transportation, and other uses make scientists realize that it is necessary to focus on energy conversion and energy storage. − Supercapacitors stand out from numerous energy storage components, benefiting from high power output, fast charge–discharge nature, long lifespan, and safe operation. ,, It is well known that the most critical part of a good supercapacitor is the electrode material . As an intermediate between graphene and graphite oxide, graphene oxide (GO) inherits the excellent properties of graphene to a certain extent.…”

Facile Synthesis of MgCo2O4@MMoO4 (M = Co, Ni) Nanosheet Arrays on Nickel Foam as an Advanced Electrode for Asymmetric Supercapacitors

“…These redox peaks were from the redox reaction between M− O/M−O−OH (M = Ni or Co) and OH − in the electrolyte. 21 At the same time, the CV area of MCNO-4 was larger than the CV curve area of MCNO-2 and MCNO-6, which was due to its most suitable shape and thickness of the NiMoO 4 layer.…”

“…Using this resource to further develop and research new molybdate materials will bring huge economic and social value. 21 In this paper, we prepared the MgCo 2 O 4 @MMoO 4 (M = Co, Ni) battery-type nanosheet array material using a two-step solvothermal method and characterized its electrochemical properties by various electrochemical testing methods, proving that the two composite materials as active electrode materials all have a higher specific capacity. At a current density of 1 mA cm −2 , the specific capacities of MgCo 2 O 4 @CoMoO 4 and MgCo 2 O 4 @NiMoO 4 reached 1089.9 and 1111.6 C g −1 at 1 mA cm −2 , respectively.…”

“…), molybdates (MMoO 4 ), especially CoMoO 4 and NiMoO 4 , are bimetallic oxide materials in which metal ions have multiple oxidation states, which have excellent redox performance and thus can improve capacity, and are also electrode materials that can be used in supercapacitors. − Moreover, the molybdenum content in the earth’s crust is very high. Using this resource to further develop and research new molybdate materials will bring huge economic and social value …”

Review of Pristine Metal–Organic Frameworks for Supercapacitors: Recent Progress and Perspectives

“…The electric double-layer capacitors mainly depend upon the charge separation on the electrode/electrolyte to produce electric double-layer capacitance based on carbon electrodes, such as activated carbon, carbon nanotubes, graphene, , etc., which have the characteristics of good conductivity, good physical and chemical stability, rich raw materials, low price, and large specific surface area. The pseudocapacitors are produced by reversible Faraday charge transfer of active materials, such as metal oxides and conductive polymers or related compounds. − These materials have good redox activity, various doping states, and high operating voltage. Recently, more novel electrode materials have attracted great interest to further improve the energy density of SCs for the demand of future portable systems and hybrid electric vehicles.…”