Details

Autor(en) / Beteiligte

• Zhao, Zhe
• Yuan, Zhongke
• Fang, Zhengsong
• Jian, Junhua
• Li, Jing
• Yang, Meijia
• Mo, Chunshao
• Zhang, You
• Hu, Xuanhe
• Li, Ping
• Wang, Shuangyin
• Hong, Wei
• Zheng, Zhikun
• Ouyang, Gangfeng
• Chen, Xudong
• Yu, Dingshan

Titel

In Situ Activating Strategy to Significantly Boost Oxygen Electrocatalysis of Commercial Carbon Cloth for Flexible and Rechargeable Zn‐Air Batteries

Ist Teil von

• Advanced science, 2018-12, Vol.5 (12), p.1800760-n/a

Ort / Verlag

Germany: John Wiley & Sons, Inc

Erscheinungsjahr

2018

Quelle

Wiley Online Library All Journals

Beschreibungen/Notizen

• An in situ strategy to simultaneously boost oxygen reduction and oxygen evolution (ORR/OER) activities of commercial carbon textiles is reported and the direct use of such ubiquitous raw material as low‐cost, efficient, robust, self‐supporting, and bifunctional air electrodes in rechargeable Zn‐air batteries is demonstrated. This strategy not only furnishes carbon textiles with a large surface area and hierarchical meso‐microporosity, but also enables efficient dual‐doping of N and S into carbon skeletons while retaining high conductivity and stable monolithic structures. Thus, although original carbon textile has rather poor catalytic activity, the activated textiles without loading other active materials yield effective ORR/OER bifunctionality and stability with a much lower reversible overpotential (0.87 V) than those of Pt/C (1.10 V) and RuO2 (1.02 V) and many reported metal‐free bifunctional catalysts. Importantly, they can concurrently function as current collectors and as ORR/OER catalysts for rechargeable aqueous and flexible solid‐state Zn‐air batteries, showing excellent cell performance, long lifetime, and high flexibility. A judicious in situ activating strategy is developed to concurrently boost the oxygen reduction/evolution activities of commercial carbon textiles without loading any other active materials and eventually transform such ubiquitous raw materials into low‐cost, efficient, robust, self‐standing, additive‐free, and bifunctional air electrodes for direct use in rechargeable liquid and flexible solid‐state Zn‐air batteries.