State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, PR China.
Nanoscale. 2017 Oct 26;9(41):15865-15872. doi: 10.1039/c7nr05728h.
Exploring highly efficient bifunctional electrocatalysts toward the oxygen reduction and evolution reactions is essential for the realization of high-performance rechargeable zinc-air batteries. Herein, a novel nanofibrous bifunctional electrocatalyst film, consisting of metallic manganese sulfide and cobalt encapsulated by nitrogen-doped carbon nanofibers (CMS/NCNF), is prepared through a continuous electrospinning method followed by carbonization treatment. The CMS/NCNF bifunctional catalyst shows both comparable ORR and OER performances to those of commercial precious metal-based catalysts. Furthermore, the free-standing CMS/NCNF fibrous thin film is directly used as the air electrode in a solid-state zinc-air battery, which exhibits superior flexibility while retaining stable battery performance at different bending angles. This study provides a versatile design route for the rational design of free-standing bifunctional catalysts for direct use as the air electrode in rechargeable zinc-air batteries.
探索高效的氧还原和氧析出双功能电催化剂对于实现高性能可充电锌空气电池至关重要。在此，通过连续静电纺丝法结合碳化处理，制备了一种由氮掺杂碳纳米纤维包裹的金属硫化锰和钴（CMS/NCNF）组成的新型纳米纤维双功能电催化剂膜。CMS/NCNF 双功能催化剂在 ORR 和 OER 性能方面与商业贵金属基催化剂相当。此外，将独立的 CMS/NCNF 纤维薄膜直接用作固态锌空气电池的空气电极，在不同弯曲角度下仍具有出色的柔韧性和稳定的电池性能。本研究为合理设计可直接用作可充电锌空气电池空气电极的独立双功能催化剂提供了一种通用的设计途径。
