University of Wollongong
Browse

High-Performance K-CO2 Batteries Based on Metal-Free Carbon Electrocatalysts

Download (937.52 kB)
journal contribution
posted on 2024-11-15, 22:46 authored by Wenchao Zhang, Chuangang Hu, Zaiping GuoZaiping Guo, Liming Dai
2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim Metal-CO2 batteries have attracted much attention owing to their high energy density and use of greenhouse CO2 waste as the energy source. However, the increasing cost of lithium and the low discharge potential of Na-CO2 batteries create obstacles for practical applications of Li/Na-CO2 batteries. Recently, earth-abundant potassium ions have attracted considerable interest as fast ionic charge carriers for electrochemical energy storage. Herein, we report the first K-CO2 battery with a carbon-based metal-free electrocatalyst. The battery shows a higher theoretical discharge potential (E⊖=2.48 V) than that of Na-CO2 batteries (E⊖=2.35 V) and can operate for more than 250 cycles (1500 h) with a cutoff capacity of 300 mA h g−1. Combined DFT calculations and experimental observations revealed a reaction mechanism involving the reversible formation and decomposition of P121/c1-type K2CO3 at the efficient carbon-based catalyst.

History

Citation

Zhang, W., Hu, C., Guo, Z. & Dai, L. (2019). High-Performance K-CO2 Batteries Based on Metal-Free Carbon Electrocatalysts. Angewandte Chemie - International Edition,

Language

English

RIS ID

141256

Usage metrics

    Categories

    Keywords

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC