N, P-Doped Cos2 Embedded In Tio2 Nanoporous Films For Zn–Air Batteries

Keywords

(N, P)-doped CoS 2; bifunctional electrocatalysts; nanoporous films; TiO 2; Zn–air batteries

Abstract

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.

Publication Date

10-17-2018

Publication Title

Advanced Functional Materials

Volume

28

Issue

42

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1002/adfm.201804540

Socpus ID

85052795299 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85052795299

This document is currently not available here.

Share

COinS