期刊
ACS APPLIED MATERIALS & INTERFACES
卷 9, 期 51, 页码 44519-44528出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b14815
关键词
oxygen reduction reaction; N,P-codoped; covalent organic framework; Zn-air battery; DFT calculation
资金
- National Natural Science Foundation of China [21572269, 21302224, 21773124, 21436003]
- Fundamental Research Funds for Chinese Central Universities [17CX05015, 15CX08005A]
- Key Research and Development Program of Shandong Province, China [2017GGX40118]
- Qingdao Science and Technology Plan [15-9-1-108-jch]
- Special Program for Applied Research on Super Computation of the NSFC-Guangdong Joint Fund (the second phase) [U1501501]
A covalent organic framework that is composed of hexachlorocyclotriphosphazene and dicyanamide has been coated on CNT to prepare metal-free oxygen reduction reaction catalyst through thermal polymerization of the Zn-air battery cathode. The N,P-codoped nanohybrids have highly porous structure and active synergistic effect between graphitic-N and -P, which promoted the electrocatalytic performance. The electrocatalysts exhibits remarkable half-wave potential (-0.162 V), high current density (6.1 mA/cm(-2)), good stability (83%), and excellent methanol tolerance for ORR in alkaline solution. Furthermore, the N,P-codoped nanohybrids were used as an air electrode for fabrication of a high performance Zn-air battery. The battery achieves a high open-circuit potential (1.53 V) and peak power density (0.255 W cm(-2)). Moreover, the effect of N,P codoping on the conjugate carbon system and the synergistic effect between graphitic-N and -P have been calculated through density functional theory calculations, which are essentially in agreement with experimental data.
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