期刊
NANO LETTERS
卷 21, 期 1, 页码 619-627出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.0c04158
关键词
Na metal anodes; dendrite-free sodium deposition; organosulfur compound; interface; electrolyte additive
类别
资金
- National Natural Science Foundation of China [52003225, 21805180]
- China Postdoctoral Science Foundation [2019M661459, 2020T130398]
- Australian Research Council [DP160102627, DE170101426, DP200100365]
- Program for Professor of Special Appointment at Shanghai Institutions of Higher Learning
- Westlake Education Foundation
- Australian Research Council [DE170101426] Funding Source: Australian Research Council
In this study, it was demonstrated that an organosulfur compound additive can help to form a stable protection layer in carbonate-based electrolytes, effectively inhibiting dendrite growth and parasitic reactions on sodium anode surface, leading to stable cycling performance.
Sodium (Na) metal is considered as a promising anode candidate for large-scale energy storage systems because of its high theoretical capacity and low electrochemical redox potential. However, Na anode suffers from a few challenges, such as the dendrite growth and severe parasitic reactions with electrolytes, which greatly hinder its practical applications. In this work, we demonstrate that an organosulfur compound additive (tetramethylthiuram disulfide) provides a facile and promising approach to overcome the above challenges in carbonate-based electrolytes. This unique organosulfur additive can in situ form a stable interfacial protection layer rich in organic sulfide salts on the sodium metal surface during cycling, leading to a stable stripping/plating cycling. Additionally, a cycling Coulombic efficiency of 94.25% is achieved, and the full battery using Prussian Blue as a cathode delivers a reversible capacity of 86.2 mAh g(-1) with a capacity retention of 80% after 600 cycles at 4 C.
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