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In Situ Activating Strategy to Significantly Boost Oxygen Electrocatalysis of Commercial Carbon Cloth for Flexible and Rechargeable Zn-Air Batteries.
Advanced Science ( IF 15.1 ) Pub Date : 2018-10-18 , DOI: 10.1002/advs.201800760
Zhe Zhao 1 , Zhongke Yuan 1 , Zhengsong Fang 1 , Junhua Jian 1 , Jing Li 1 , Meijia Yang 1 , Chunshao Mo 1 , You Zhang 1 , Xuanhe Hu 1 , Ping Li 1 , Shuangyin Wang 2 , Wei Hong 1 , Zhikun Zheng 1 , Gangfeng Ouyang 3 , Xudong Chen 1 , Dingshan Yu 1
Affiliation  

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.

中文翻译:

原位活化策略可显着促进柔性可充电锌空气电池的商用碳布的氧电催化作用。

据报道,一种同时增强商业碳纺织品的氧还原和氧析出(ORR/OER)活性的原位策略,以及直接使用低成本、高效、坚固、自支撑和双功能空气电极等普遍存在的原材料演示了可充电锌空气电池。该策略不仅使碳纺织品具有大表面积和分级介孔性,而且还能够将N和S有效地双重掺杂到碳骨架中,同时保持高导电性和稳定的整体结构。因此,尽管原始碳织物的催化活性相当差,但在不负载其他活性材料的情况下活化后的织物可产生有效的ORR/OER双功能和稳定性,且可逆过电位(0.87 V)远低于Pt/C(1.10 V)和RuO 2 (1.02 V) 和许多报道的无金属双功能催化剂。重要的是,它们可以同时用作可充电水性和柔性固态锌空气电池的集流体和ORR/OER催化剂,表现出优异的电池性能、长寿命和高灵活性。
更新日期:2018-10-18
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