Curtailing the Overpotential of Li–CO2 Batteries with Shape-Controlled Cu2O as Cathode: Effect of Illuminating the Cathode

Anirudha Jena, He Chin Hsieh, Subashchandrabose Thoka, Shu Fen Hu, Ho Chang, Ru Shi Liu

研究成果: 雜誌貢獻文章

1 引文 斯高帕斯(Scopus)

摘要

Li–air batteries are limited to lab-scale research owing to the uninterrupted formation of discharge products. In the case of Li–CO2 batteries, the increase in overpotential caused by Li2CO3 formation results in cell death. In this study, Cu2O crystals having three different types of shapes (i.e., cubic, octahedral, and rhombic) were synthesized to compare their catalytic activity toward CO2 reactions. The full-cycle and long-term stability test revealed that rhombohedral Cu2O facilitates Li2CO3 decomposition more efficiently than that of cubic and octahedral Cu2O. The cycle was extended to investigate the photocatalytic activity of the rhombic Cu2O by illuminating the cell. The repeated cycles to 1 h showed a maximum overpotential of 1.5 V, which is 0.5 V lower than that of the cell without illumination. A postmortem analysis of the cell after dividing the cycles into segments demonstrated interesting results concerning the role of light and Cu2O during the cell cycle.

原文英語
頁(從 - 到)2719-2725
頁數7
期刊ChemSusChem
13
發行號10
DOIs
出版狀態已發佈 - 2020 五月 22

ASJC Scopus subject areas

  • Environmental Chemistry
  • Chemical Engineering(all)
  • Materials Science(all)
  • Energy(all)

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