锌空气电池双功能阴极催化剂研究进展

Research Progress in Bifunctional Electrocatalysts for Rechargeable Zn-air Batteries

可充电锌空气电池(ZAB)被认为是具有前景的储能设备之一。阴极氧还原反应和氧析出反应(ORR和OER)动力学缓慢,限制ZAB的实际应用,开发出高活性催化ORR/OER双功能阴极电催化剂尤为重要。综述了非贵金属双功能阴极电催化剂,包括无金属碳材料催化剂、过渡金属催化剂和过渡金属-氮掺杂碳材料组合催化剂,讨论几种催化剂催化活性和电化学性能的改进方法,就目前该研究方向中仍待解决的问题进行了总结,并对下一步的研究进行了展望。

Rechargeable zinc-air battery(ZAB) is considered one of the promising energy storage devices. Cathodic oxygen reduction reaction and oxygen evolution reaction(ORR and OER) kinetics are slow, which limits the practical application of ZAB. It is essential to develop an ORR/OER bifunctional electrocatalyst with high catalytic activity. In this article, non-precious metal bifunctional electrocatalyst materials were reviewed, including carbon-based metal-free bifunctional catalyst materials, transition metal catalyst materials, and transition metal-nitrogen doped carbon hybrid catalyst materials. Several methods for improving the catalytic activity and electrochemical performance of the catalysts were discussed. The problems to be solved in the direction were summarized, and the future research was prospected.