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Nitrogen‐Doped Cobalt Pyrite Yolk–Shell Hollow Spheres for Long‐Life Rechargeable Zn–Air Batteries
Advanced Science ( IF 14.3 ) Pub Date : 2020-10-13 , DOI: 10.1002/advs.202001178 Xue Feng Lu 1 , Song Lin Zhang 1 , Enbo Shangguan 2 , Peng Zhang 1 , Shuyan Gao 2 , Xiong Wen David Lou 1
Advanced Science ( IF 14.3 ) Pub Date : 2020-10-13 , DOI: 10.1002/advs.202001178 Xue Feng Lu 1 , Song Lin Zhang 1 , Enbo Shangguan 2 , Peng Zhang 1 , Shuyan Gao 2 , Xiong Wen David Lou 1
Affiliation
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Limited by the sluggish four‐electron transfer process, designing high‐performance nonprecious electrocatalysts for the oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) is urgently desired for efficient rechargeable Zn–air batteries (ZABs). Herein, the successful synthesis of porous nitrogen‐doped cobalt pyrite yolk–shell nanospheres (N‐CoS2 YSSs) is reported. Benefiting from the abundant porosity of the porous yolk–shell structure and unique electronic properties by nitrogen doping, the as‐prepared N‐CoS2 YSSs possess more exposed active surface, thus giving rise to superior activity for reversible oxygen electrocatalysis and outstanding cycling stability (more than 165 h at 10 mA cm−2) in ZABs, exceeding the commercial Pt/C and RuO2 hybrid catalysts. Moreover, the assembled ZABs, delivering a specific capacity of 640 mAh gZn−1, can be used for practical devices. This work provides a novel tactic to engineer sulfides as high efficiency and promising bifunctional oxygen electrocatalysts for advanced metal–air batteries.
中文翻译：
用于长寿命可充电锌空气电池的氮掺杂钴黄铁矿蛋黄壳空心球
受缓慢的四电子转移过程的限制，高效可充电锌空气电池（ZAB）迫切需要设计用于析氧反应（OER）和氧还原反应（ORR）的高性能非贵金属电催化剂。在此，报道了多孔氮掺杂钴黄铁矿蛋黄壳纳米球（N-CoS 2 YSS）的成功合成。得益于多孔蛋黄-壳结构的丰富孔隙率和氮掺杂独特的电子特性，所制备的N-CoS 2 YSS具有更多的暴露活性表面，从而产生优异的可逆氧电催化活性和出色的循环稳定性。在ZABs中在10 mA cm -2下超过165小时，超过商业Pt/C和RuO 2混合催化剂。此外，组装的ZAB具有640 mAh g Zn -1的比容量，可用于实际设备。这项工作提供了一种新颖的策略，将硫化物设计为先进金属空气电池的高效且有前途的双功能氧电催化剂。
更新日期：2020-11-19
中文翻译：
用于长寿命可充电锌空气电池的氮掺杂钴黄铁矿蛋黄壳空心球
受缓慢的四电子转移过程的限制，高效可充电锌空气电池（ZAB）迫切需要设计用于析氧反应（OER）和氧还原反应（ORR）的高性能非贵金属电催化剂。在此，报道了多孔氮掺杂钴黄铁矿蛋黄壳纳米球（N-CoS 2 YSS）的成功合成。得益于多孔蛋黄-壳结构的丰富孔隙率和氮掺杂独特的电子特性，所制备的N-CoS 2 YSS具有更多的暴露活性表面，从而产生优异的可逆氧电催化活性和出色的循环稳定性。在ZABs中在10 mA cm -2下超过165小时，超过商业Pt/C和RuO 2混合催化剂。此外，组装的ZAB具有640 mAh g Zn -1的比容量，可用于实际设备。这项工作提供了一种新颖的策略，将硫化物设计为先进金属空气电池的高效且有前途的双功能氧电催化剂。
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