Zeng Sha, Chen Hongyuan, Wang Han, Tong Xiao, Chen Minghai, Di Jiangtao, Li Qingwen
School of Nano-Technology and Nano-Bionics, University of Science and Technology of China, Hefei, 230000, China.
Key Lab of Nanodevices and Applications and Division of Advanced Nanomaterials, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, 215123, China.
Small. 2017 Aug;13(29). doi: 10.1002/smll.201700518. Epub 2017 Jun 8.
Air electrodes with high catalytic activity are of great importance for rechargeable zinc-air batteries. Herein, a flexible, binder-free composite air electrode for zinc-air batteries is reported, which utilizes a lightweight, conductive, and crosslinked aerogel film of carbon nanotubes (CNTs) functioned as a 3D catalyst-supporting scaffold for bifunctional cobalt (II/III) oxides and as a current collector. The composite electrode shows high catalytic activities for both oxygen reduction reaction and oxygen evolution reaction, resulting from the synergistic effect of nitrogen-doped CNTs and spinel Co O nanoparticles. Solid-state Zn-air batteries assembled using such free-standing air electrodes (without the need of additional current collectors) are bendable and show low resistances, low charge/discharge overpotentials, and a high cyclic stability.
具有高催化活性的空气电极对于可充电锌空气电池至关重要。在此，报道了一种用于锌空气电池的柔性、无粘合剂复合空气电极，其利用碳纳米管（CNT）的轻质、导电和交联气凝胶膜作为双功能钴（II/III）氧化物的3D催化剂支撑支架以及集电器。该复合电极对氧还原反应和析氧反应均表现出高催化活性，这是由氮掺杂碳纳米管和尖晶石CoO纳米颗粒的协同效应所致。使用这种自立式空气电极组装的固态锌空气电池（无需额外的集电器）可弯曲，且具有低电阻、低充放电过电位和高循环稳定性。
