Direct insights into the electrochemical processes at anode/electrolyte interfaces in magnesium-sulfur batteries
| Autor: | Shuang-Yan Lang, Rui Wen, Yu-Guo Guo, Xin-Cheng Hu, Xing Zhang, Li-Jun Wan, Yang Shi, Lin Gu |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment Nucleation Nanoparticle Diglyme 02 engineering and technology Electrolyte 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Stripping (fiber) 0104 chemical sciences Anode chemistry.chemical_compound chemistry Chemical engineering Electrode General Materials Science Electrical and Electronic Engineering 0210 nano-technology |
| Zdroj: | Nano Energy. 49:453-459 |
| ISSN: | 2211-2855 |
| Popis: | Magnesium-sulfur (Mg-S) batteries are highly attractive because of their high theoretical energy density, low cost and safety features. However, severe capacity fading issues limit their development, which are greatly associated with reaction processes at electrode/electrolyte interfaces. Herein, we systematically studied the interfacial processes of Mg deposition/stripping in ether-based electrolytes at nanoscale by in situ atomic force microscopy (AFM). It can be directly observed the initial nucleation of bowl-like structure and deposition of crystallized Mg upon charge in tetraglyme (TEG) - based electrolyte, followed with uniform stripping process upon discharge. In contrast, the initial nucleation of bowl-like structure, fast stack of nanoparticles (NPs) and deposition of crystallized Mg upon charge can be observed in diglyme (DEG) - based electrolyte, followed with nonuniform stripping process upon discharge. Combined with in situ optical imaging, former system shows better reversibility upon cycle. The present results reveal a direct insight into the structure-reactivity correlation at anode/electrolyte interfaces, which provides deep understanding of the interfacial mechanism to guide the design and development of the high-energy Mg-S batteries. |
| Databáze: | OpenAIRE |
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