Lu Yue, Zou Shanbao, Li Jiajie, Li Chenyu, Liu Xundao, Dong Dehua
School of Materials Science and Engineering, University of Jinan, Jinan 250022, P. R. China.
Langmuir. 2021 Nov 9;37(44):13018-13026. doi: 10.1021/acs.langmuir.1c02100. Epub 2021 Oct 25.
For zinc-air batteries, it is of great importance to heighten the oxygen reduction reaction (ORR) activity of cathode electrocatalysts. Herein, we synthesized carbon nanoribbons doped with Fe, B, and N as high-activity ORR electrocatalysts by a templating method. Benefiting from the melamine fiber (MF) and B doping, the as-prepared carbon nanoribbon has a high specific surface area, and the improved turnover frequency of Fe sites increases the ORR activity. The as-synthesized Fe-B-N-C electrocatalyst shows an improved half-wave potential and limited current density compared to Fe-N-C, B-N-C, and N-C. Moreover, zinc-air batteries with the Fe-B-N-C electrocatalyst exhibit a higher specific capacity and better long-term durability compared to those with commercial Pt/C. This work provides an effective strategy to synthesize noble-metal-free electrocatalysts for wide applications of zinc-air batteries.
对于锌空气电池而言，提高阴极电催化剂的氧还原反应（ORR）活性至关重要。在此，我们通过模板法合成了掺杂Fe、B和N的碳纳米带作为高活性ORR电催化剂。得益于三聚氰胺纤维（MF）和B掺杂，所制备的碳纳米带具有高比表面积，并且Fe位点周转频率的提高增强了ORR活性。与Fe-N-C、B-N-C和N-C相比，合成的Fe-B-N-C电催化剂表现出更高的半波电位和极限电流密度。此外，与使用商业Pt/C的锌空气电池相比，采用Fe-B-N-C电催化剂的锌空气电池具有更高的比容量和更好的长期耐久性。这项工作为合成用于锌空气电池广泛应用的无贵金属电催化剂提供了一种有效策略。
