N, P-doped CoS2 Embedded in TiO2 Nanoporous Films for Zn-Air Batteries
N, P-doped CoS2 Embedded in TiO2 Nanoporous Films for Zn-Air Batteries
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用于锌空气电池的 TiO2 纳米多孔薄膜中嵌入 N、P 掺杂 CoS2
DOI：
10.1002/adfm.201804540
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发表时间：
2018-10-17
影响因子：
19
通讯作者：
Yang, Yang
中科院分区：
文献类型：
--
作者：
Guo, Limin;Deng, Jinan;Yang, Yang
The search for efficient and cost-effective catalysts for bifunctional oxygen reduction and evolution reaction (ORR and OER) is highly demanded because of the sluggish four-electron transfer involved redox reactions in Zn-air batteries (ZABs). Herein, (N, P) codoped CoS2 nanoclusters embedded inside TiO2 nanoporous films (denoted as N, P/CoS2@TiO2 NPFs) are synthesized as novel bifunctional ORR/OER catalysts for ZABs. The catalytic activity and stability are promoted by the (N, P)-dopants due to the enhanced conductivity, increased active surface area, and facilitated reaction kinetics. The N, P/CoS2@TiO2 NPFs exhibit exceptional onset potentials of 0.91 and 1.41 V for ORR and OER, respectively. When used as cathodes in ZABs, the N, P/CoS2@TiO2 NPFs exhibit a reduced charge-discharge gap of 0.8 V at 10 mA cm(-2) and a stable cycling performance over 130 h, surpassing the conventional Pt/C+IrO2 catalysts. Moreover, the assembled ZABs delivering a specific capacity of 610 mAh g(-1) can be used for flexible devices. This work provides a path for the rational design of bifunctional electrocatalyst for ZABs.
