Exploring Indium-Based Ternary Thiospinel as Conceivable High-Potential Air-Cathode for Rechargeable Zn-Air Batteries

Fu, GT (Fu, Gengtao)[ 1 ] ; Wang, J (Wang, Jie)[ 2 ] ; Chen, YF (Chen, Yifan)[ 3 ] ; Liu, Y (Liu, Yu)[ 1 ] ; Tang, YW (Tang, Yawen)[ 3 ]*（唐亚文）; Goodenough, JB (Goodenough, John B.)[ 4,5 ]*; Lee, JM (Lee, Jong-Min)[ 1 ]*

[ 1 ] Nanyang Technol Univ, Sch Chem & Biomed Engn, Singapore 637459, Singapore

[ 2 ] Qingdao Agr Univ, Sch Chem & Pharmaceut Sci, Qingdao 266109, Peoples R China

[ 3 ] Nanjing Normal Univ, Sch Chem & Mat Sci, Jiangsu Collaborat Innovat Ctr Biomed Funct Mat, Jiangsu Key Lab New Power Batteries, Nanjing 210023, Jiangsu, Peoples R China

[ 4 ] Univ Texas Austin, Mat Sci & Engn Program, Austin, TX 78712 USA

[ 5 ] Univ Texas Austin, Texas Mat Inst, Austin, TX 78712 USA

ADVANCED ENERGY MATERIALS, 201811,8,31

Reversible oxygen reactions in Zn-air batteries require cost-effective and highly-active bifunctional electrocatalysts to substitute traditional noblemetal based catalysts. Herein, a new and promising electrocatalytic material, ternary CoIn2S4 thiospinel, is demonstrated for effectively catalyzing oxygen reduction and oxygen evolution reactions (ORR and OER) with S-doped reduced graphene oxide (S-rGO) as an electronic conductor. Compared with Co9S8/S-rGO (without In doping), the newly developed CoIn2S4/S-rGO reveals superior electrocatalytic properties for the ORR (half-wave potential of 0.83 V) and OER (overpotential of 0.37 V at 10 mA cm(-2)), demonstrating that the introduction of In can promote the reversible oxygen electrode reactions of CoIn2S4. The superior experimentally- observed electrocatalytic properties are corroborated via density function theory investigations. Meanwhile, the synergistic improvements in the bifunctional activities resulting from the combination of CoIn2S4 and S-rGO are also confirmed. As a proof of concept, home-made Zn-air cells are assembled with CoIn2S4/S-rGO as an air-cathode. The developed Zn-air cells exhibit a high peak power density (133 mW cm(-2)) with an energy density of 951 Wh kgZn(-1) and robust cycling stability over 150 cycles for 50 h, exceeding of those commercial Pt/C+ RuO2 which highlights the practical viability of CoIn2S4/S-rGO for rechargeable Zn-air batteries.

文章链接：

https://onlinelibrary.wiley.com/doi/full/10.1002/aenm.201802263

版权与免责声明：本网页的内容由收集互联网上公开发布的信息整理获得。目的在于传递信息及分享，并不意味着赞同其观点或证实其真实性，也不构成其他建议。仅提供交流平台，不为其版权负责。如涉及侵权，请联系我们及时修改或删除。邮箱：sales@allpeptide.com