Issue 8, 2024

Enhanced As-COF nanochannels as a high-capacity anode for K and Ca-ion batteries

Abstract

Covalent organic frameworks can be used for next-generation rechargeable metal-ion batteries due to their controllable spatial and chemical architectures and plentiful elemental reserves. In this study, the arsenic-based covalent organic framework (As-COF) is designed by employing the geometrical symmetry of a semiconducting phosphazene-based covalent organic framework that uses p-phenylenediamine as a linker and hexachorocyclotriphosphazene as an As-containing monomer in a C3-like spatial configuration. The As-COF with engineered nanochannels demonstrates exceptional anodic behavior for potassium (K) and calcium (Ca) ion batteries. It exhibits a high storage capacity of about 914(2039) mA h g−1, low diffusion barriers of 0.12(0.26) eV, low open circuit voltage of 0.23(0.18) V, and a minimal volume expansion of 2.41(2.32)% for K (Ca) ions. These attributes collectively suggest that As-COF could significantly advance high-capacity rechargeable batteries.

Graphical abstract: Enhanced As-COF nanochannels as a high-capacity anode for K and Ca-ion batteries

Supplementary files

Article information

Article type
Paper
Submitted
24 Oct 2023
Accepted
01 Feb 2024
First published
12 Feb 2024

Phys. Chem. Chem. Phys., 2024,26, 6977-6983

Enhanced As-COF nanochannels as a high-capacity anode for K and Ca-ion batteries

S. Ahmed, A. Ghani, I. Muhammad, I. Muhammad, A. Mehmood, N. Ullah, A. Hassan, Y. Wang, X. Tian and B. Yakobson, Phys. Chem. Chem. Phys., 2024, 26, 6977 DOI: 10.1039/D3CP05171D

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