Journal
CARBON
Volume 167, Issue -, Pages 75-84Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2020.06.002
Keywords
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Funding
- National Natural Science Foundation of China [21673064, 51802059, 21905070]
- China Postdoctoral Science Foundation [2017M621284, 2018M631938, 2018T110307]
- State Key Laboratory of UrbanWater Resource and Environment (Harbin Institute of Technology) [2020DX11]
- Heilongjiang Postdoctoral Fund [LBH-Z17074, LBHZ18066]
- Fundamental Research Funds for the Central Universities
- NSRIF [2019040, 2019041]
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Development of high-efficiency non-noble metal materials to substitute Pt-based catalysts for oxygen reduction reactions is crucial in the commercial viability of Zn-air batteries technology. Nitrogen doped carbons (NDCs) are highly appealing as promising candidates. This study reports a facile molten salt (MS) method to synthesize aerogel-like nitrogen doped carbon (NDC-MS). The eutectic mixture acting as combined solvent and porogen leads to the obtained porous materials with extremely large surface area (1548.6 m(2) g(-1)) and relatively high pore volume. The unique aerogel-like structure with hierarchical structure, increased catalytic active sits, extended surface area and large pore volume is beneficial for enhancing oxygen reduction reaction (ORR) performance. The resultant NDC-MS displays a superb ORR catalytic activity with high half-wave potential of 0.88 V, which is one of the most effective figures in previous literature of metal-free catalysts. The superb ORR performance can also be evaluated by Zn-air batteries with satisfactory power density and long-term operation stability. Therefore, such an efficient and green synthetic strategy can open up a new avenue for a wide range of commercial application of heteroatom doped carbon materials in advanced energy technologies. (C) 2020 Elsevier Ltd. All rights reserved.
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