期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 8, 期 20, 页码 10419-10425出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0ta03051a
关键词
-
资金
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Science and ICT [NRF-2019R1A2C1003594, NRF-2019R1A2C1003551]
Saponin, comprising hydrophilic glycoside moieties with a hydrophobic aglycone structure, is introduced for the first time as a multi-functional additive for high-performance sulfur cathodes. The hydroxyl groups efficiently suppress the lithium polysulfide shuttle effect and prepare sites that can strengthen the mechanical properties of the cathode through crosslinking with a polymer binder. The amphiphilic structure of saponin also helps to disperse active electrode materials in the sulfur cathode. Through the synergistic effects from its unique structure, the addition of a small amount (1 wt%) of saponin into the sulfur cathode boosts a 300% increase in the specific capacity of the cathode with a capacity decay of 0.012% per cycle at 2C over 1000 cycles.
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