Highly dispersive bimetallic sulfides afforded by crystalline polyoxometalate-based coordination polymer precursors for efficient hydrogen evolution reaction

Sui

et al. 2020

ACS Appl. Nano Mater.

146

Transition-metal phosphates/phosphides, as an emerging kind of prominent electroactive material, have drawn extensive attention in the fields of energy conversion and storage owing to their high electrical conductivity and metal-like properties. Herein, we report the preparation of hierarchical Ni–Co–P/PO x /C nanosheets in a controllable manner using nickel–cobalt metal–organic framework (NiCo-MOF) as the precursor, followed by a low-temperature phosphating method. Electrochemical studies show that the Ni–Co–P/PO x /C nanosheets exhibit good reversible capacity and excellent rate capability and possess capacities of 583 and 365.7 C g–1 at 1 and 30 A g–1, respectively. Furthermore, a two-electrode device assembled by Ni–Co–P/PO x /C and reduced graphene oxide shows a peak energy density of 37.59 Wh kg–1 at a power density of 800 W kg–1 and a stable capacitive performance. These results indicate that the obtained bimetallic Ni–Co–P/C is a promising anode material for capacitive energy storage devices.

Section: ■ Results and Discussionmentioning

confidence: 99%

Hierarchical Nickel–Cobalt Phosphide/Phosphate/Carbon Nanosheets for High-Performance Supercapacitors

Zhang

Sui

et al. 2020

ACS Appl. Nano Mater.

146

“…Recently, polyoxometalates (POMs) as a kind of functional material have attracted wide attention because of their potential applications in the field of catalysis, [15][16][17] batteries, 18,19 supercapacitors, 20,21 and electrochemistry. 22,23 Particularly, some POMs can be used as catalysts for efficiently catalyzing the oxidation of various alkylbenzenes; [24][25][26][27][28] however, they have the disadvantages of limited reaction modes and high solubility, which limit their application.…”

Section: Introductionmentioning

confidence: 99%

A Keggin-type polyoxometalate-based metal–organic complex as a highly efficient heterogeneous catalyst for the selective oxidation of alkylbenzenes

Zhang

et al. 2022

Dalton Trans.

“…The use of POM-based hybrid compounds as electrodes has been recently reported to show high performance both in lithium ion batteries and electrocatalytic applications. [27,28] However, to the best of our knowledge, supercapacitor electrodes fabricated by POM-based coordination polymers have only been reported in a few cases. [15,[29][30][31][32] In view of these scarce previous studies, we have decided to study POM-based coordination polymers as material for the preparation of an ASC device to study its actual application performance for the first time.…”

Section: Introductionmentioning

confidence: 99%

A High‐Capacity Negative Electrode for Asymmetric Supercapacitors Based on a PMo₁₂ Coordination Polymer with Novel Water‐Assisted Proton Channels

Chen

Gómez‐García

et al. 2020

Small

Self Cite

133

The development of a negative electrode for supercapacitors is a critical challenge for the next-generation of energy-storage devices. Herein, we describe two new electrodes formed by the coordination polymers [Ni(itmb) 4 (HPMo 12 O 40 )]•2H 2 O (1) and [Zn(itmb) 3 (H 2 O)(HPMo 12 O 40 )]•4H 2 O (2) (itmb = 1-(imidazo-1-ly)-4-(1,2,4-triazol-1-ylmethyl)benzene), synthesized by a simple hydrothermal method. Compounds 1 and 2 show high capacitances of 477.9 and 890.2 F g -1 , respectively. An asymmetric supercapacitor device assembled using 2 which has novel water-assisted proton channels as negative electrode and active carbon as positive electrode shows ultrahigh energy density and power density of 23.4 W h kg -1 and 3864.4 W kg -1 , respectively. Moreover, the ability to feed a red LED also demonstrates the This article is protected by copyright. All rights reserved. feasibility for practical use. Our results allow a better elucidation of the storage mechanism in polyoxometalate-based coordination polymers and provide a promising direction for exploring novel negative materials for new-generation high-performance supercapacitors.