Effective Ru/CNT Cathode for Rechargeable Solid-State Li-CO2Batteries

Kirankumar Venkatesan Savunthari, Chien Hung Chen, You Ruei Chen, Zizheng Tong, Kevin Iputera, Fu Ming Wang, Chun Chuan Hsu, Da Hua Wei, Shu Fen Hu, Ru Shi Liu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)


An effective Ru/CNT electrocatalyst plays a crucial role in solid-state lithium-carbon dioxide batteries. In the present article, ruthenium metal decorated on a multi-walled carbon nanotubes (CNTs) is introduced as a cathode for the lithium-carbon dioxide batteries with Li1.5Al0.5Ge1.5(PO4)3 solid-state electrolyte. The Ru/CNT cathode exhibits a large surface area, maximum discharge capacity, excellent reversibility, and long cycle life with low overpotential. The electrocatalyst achieves improved electrocatalytic performance for the carbon dioxide reduction reaction and carbon dioxide evolution reaction, which are related to the available active sites. Using the Ru/CNT cathode, the solid-state lithium-carbon dioxide battery exhibits a maximum discharge capacity of 4541 mA h g-1 and 45 cycles of battery life with a small voltage gap of 1.24 V compared to the CNT cathode (maximum discharge capacity of 1828 mA h g-1, 25 cycles, and 1.64 V as voltage gap) at a current supply of 100 mA g-1 with a cutoff capacity of 500 mA h g-1. Solid-state lithium-carbon dioxide batteries have shown promising potential applications for future energy storage.

Original languageEnglish
Pages (from-to)44266-44273
Number of pages8
JournalACS Applied Materials and Interfaces
Issue number37
Publication statusPublished - 2021 Sept 22


  • LAGP solid electrolyte
  • Ru nanoparticles
  • Ru/CNT cathode
  • and Li-metal anode
  • solid-state Li-CObatteries

ASJC Scopus subject areas

  • Materials Science(all)


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