双功能
析氧
电池(电)
催化作用
材料科学
氧气
纳米颗粒
阴极
化学工程
电极
纳米技术
氧还原反应
氧还原
克拉克电极
金属
化学
冶金
电化学
有机化学
功率(物理)
工程类
电解质
物理化学
物理
量子力学
作者
Junbin Tan,Tiju Thomas,Jixing Liu,Yang Liu,Lining Pan,Rui Cao,Hong Shen,Jiacheng Wang,Jian Liu,Minghui Yang
标识
DOI:10.1016/j.cej.2020.125151
摘要
Precious metal-free bifunctional catalysts offer scalable possibilities for achieving oxygen cathodes in rechargeable metal-air batteries. Literature thus far suggests that the oxygen reduction and evolution reactions (i.e ORR and OER) take place at different active sites. However, the design and preparation of oxygen electrocatalysts with high-performance is still a great challenge. This work develops a general approach to introduce a nanoparticle that offers oxygen evolution reaction sites onto an oxygen reduction reaction catalyst via rapid microwave treatment. The metal–organic frameworks (Co, ZIF-8) derived Co-N-C with high ORR performance is employed as a support to homogeneously disperse OER active Ni3Fe nanoparticles. Potentials of 1.54 V and 0.79 V have been achieved at current densities of 10 mA cm−2 for OER and 3 mA cm−2 toward ORR, respectively. The developed rechargeable Zn-air battery assembled with Ni3Fe/Co-N-C as an oxygen-electrode exhibits superior efficiency and robust durability, exceeding that of commercial Pt/C + IrO2. Furthermore, the satisfactory activity of our fabricated wristband shows the successfully practical application of flexible Zn-air batteries for wearable devices.
科研通智能强力驱动
Strongly Powered by AbleSci AI