MoS2 nanosheets grown on carbon cloth as a bifunctional cathode for long-life Na–O2 batteries
| Autor: | Xiao dong Wang, Xiong Zhang, Jin-ling Ma, Qin-yin Shen, Ming Tang |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Sodium superoxide
Materials science Mechanical Engineering Sodium Sodium peroxide Metals and Alloys Oxygen evolution chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Cathode 0104 chemical sciences law.invention Catalysis chemistry.chemical_compound chemistry Chemical engineering Mechanics of Materials law Materials Chemistry 0210 nano-technology Molybdenum disulfide Carbon |
| Zdroj: | Journal of Alloys and Compounds. 882:160702 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2021.160702 |
| Popis: | When sodium (Na)–oxygen (O2) batteries discharge, O2 is reduced on the cathode to form solid sodium oxides deposited on cathode, severely impeding the mass transfer path and causing large voltage polarization, low energy efficiency and poor rate performance. Therefore, a novel cathode is the key to solving the above issues. Here, in-situ growing molybdenum disulfide on carbon cloth (MoS2/CC) as a binder-free cathode is prepared by a simple and facile hydrothermal method. When this cathode is tested in Na–O2 batteries, it presents enhanced oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) catalytic activity as well as large discharge capacity. What's more, Na–O2 batteries with the MoS2/CC cathode simultaneously produce sodium superoxide (NaO2) and poor crystalline sodium peroxide (Na2O2), which greatly reduces the charge potential. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect