Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 25, Issue 47, Pages 7300-7308Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201503639
Keywords
conversion reactions; dual-salt electrolytes; iron sulfides; Li-driven cathodes; Mg-based batteries
Categories
Funding
- National Natural Science Foundation of China [51372263]
- Chinese Academy of Sciences [KGZD-EW-T06]
- Hundred Talents program of the Chinese Academy of Sciences
- Science Foundation for Young Researchers of State Key Laboratory of High Performance Ceramics and Superfine Microstructures
Ask authors/readers for more resources
Mg batteries as the most typical multivalent batteries are attracting increasing attention because of resource abundance, high volumetric energy density, and smooth plating/stripping of Mg anodes. However, current limitations for the progress of Mg batteries come from the lack of high voltage electrolytes and fast Mg-insertable structure prototypes. In order to improve their energy or power density, hybrid systems combining Li-driven cathode reaction with Mg anode process appear to be a potential solution by bypassing the aforementioned limitations. Here, FeS (x) (x = 1 or 2) is employed as conversion cathode with 2-4 electron transfers to achieve a maximum energy density close to 400 Wh kg(-1), which is comparable with that of Li-ion batteries but without serious dendrite growth and polysulphide dissolution. In situ formation of solid electrolyte interfaces on both sulfide and Mg electrodes is likely responsible for long-life cycling and suppression of S-species passivation at Mg anodes. Without any decoration on the cathode, electrolyte additive, or anode protection, a reversible capacity of more than 200 mAh g(-1) is still preserved for Mg/FeS2 after 200 cycles.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available