https://scholars.lib.ntu.edu.tw/handle/123456789/626503
標題: | Na@C composite anode for a stable Na|NZSP interface in solid-state Na-CO2 battery | 作者: | Tong, ZZ Wang, SB Wang, YC Yi, CH Wu, CC Chang, WS Tsai, KT Tsai, SY Hu, SF RU-SHI LIU |
關鍵字: | Preferentially etched crystal planes; Kinetically stable interphase; Composite anode; NZSP; Na-CO2 battery; INTERPHASE; CHEMISTRY | 公開日期: | 2022 | 出版社: | ELSEVIER SCIENCE SA | 卷: | 922 | 來源出版物: | JOURNAL OF ALLOYS AND COMPOUNDS | 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. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/626503 | ISSN: | 0925-8388 | DOI: | 10.1016/j.jallcom.2022.166123 |
顯示於: | 化學系 |
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