A highly efficient cathode catalyst γ-MnO2@CNT composite for sodium-air batteries
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The γ-MnO2@CNT catalyst was prepared by in situ solid phase synthesis and first applied into sodium-air batteries (SABs). The initial discharge specific capacity of SABs with γ-MnO2@CNT catalyst can reach 8804 mA h g−1 and the overpotential gap is only 140 mV, which is better than the batteries that is catalyzed by α-MnO2@CNT and pure CNT. Besides, the batteries also exhibit excellent cycle performance, which can keep relatively stable for 246 cycles at 500 mA g−1 and 140 cycles at 1000 mA g−1.
Keywordsγ-MnO2 cathode catalyst solid phase synthesis sodium-air batteries
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This work was supported by the National Key R&D Program (2016YFB0901502, 2016YFB0101201), the National Natural Science Foundation of China (NSFC) (51771094), Ministry of Education (B12015), and Tianjin High-Tech (18JCZDJC31500).
- 7.Song K, Agyeman DA, Park M, Yang J, Kang YM. Adv Mater, 2017, 29: 06572Google Scholar