Na@C composite anode for a stable Na|NZSP interface in solid-state Na–CO2 battery

Zizheng Tong, Shu Bo Wang, Yan Cheng Wang, Chia Hui Yi, Ching Chen Wu, Wen Sheng Chang, Kun Ta Tsai, Sung Yu Tsai, Shu Fen Hu*, Ru Shi Liu

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

摘要

Na–CO2 battery is one of the most promising energy storage devices for the exploration of Mar. To fix the evaporation problem of liquid electrolytes in an open system, solid-state electrolyte Na3Zr2Si2PO12 (NZSP) is used to fabricate a solid-state Na–CO2 battery. In the battery, the interface between the Na-metal anode and NZSP plays a vital role in improving electrochemical performance. The interfacial parasitic reaction between NZSP and Na-metal results in a Na-rich kinetically stable interphase. (200) and (−111) planes are the preferentially etched crystal planes of NZSP, as SiO4 and PO4 tetrahedrons on the planes are easily broken by extra Na-ion injection. Aside from the interfacial reaction, the poor contact between Na-metal and NZSP is a more serious problem, which leads to large interfacial resistance and poor cycling stability. To fix this problem, carbon black is mixed with melted Na-metal to prepare a composite anode (Na@C). The Na@C composite anode easily wets NZSP, thus decreasing the interfacial resistance from 918 to 98 Ω cm2. Symmetrical cells stably cycled 1100 h at 0.1 mA cm−2, when using Na@C as the electrode. Furthermore, Na–CO2 battery with Na@C composite anode also shows a prolonged cycling life.

原文英語
文章編號166123
期刊Journal of Alloys and Compounds
922
DOIs
出版狀態已發佈 - 2022 11月 20

ASJC Scopus subject areas

  • 材料力學
  • 機械工業
  • 金屬和合金
  • 材料化學

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