In situ growth of oxometallate-based coordination polymer decorated Ti3C2Tx MXene with enhanced water-assisted proton channels for flexible all-solid-state supercapacitor

Ying Huang, Shuai Zhang, Jiaming Wang, Xiaopeng Han, Xu Sun

Research output: Contribution to journalArticlepeer-review

Abstract

As promising electrode material contender for supercapacitors, MXene has high conductivity, abundant surface functional groups, and large surface area. However, the self-restacking of MXene leads to poor ion-accessible surface area and restricted ion transport routes. Water-assisted proton channels contained by Polyoxometallate-based coordination polymer (POMCP) can improve the efficiency of ion transport between MXene layers, which is conducive to enhancing the storage capacity and rate performance. Herein, [PW12O40]@[Cu6O(TZI)3(H2O)6]4·OH·31H2O (CuCP) decorated Ti3C2Tx (CuCP/MX) was synthesized by in-situ hydrothermal method. Attribute to the extended interlayer space and enhanced ion transport efficiency, CuCP/MX exhibits excellent electrochemical energy storage properties. It is worth revealing that when assembling into an all-solid-state supercapacitor device (SC), excellent specific capacitance (380 mF/cm2) and energy density (68.4 μWh/cm2 at 540 μW/cm2) were exhibited. CuCP/MX is a considerable electrode material for supercapacitors for flexible electronic devices.

Original languageEnglish
Article number134965
JournalMaterials Letters
Volume350
DOIs
StatePublished - 1 Nov 2023

Keywords

  • Energy storage and conversion
  • Nanocomposites
  • Thin films

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