期刊
ADVANCED ENERGY MATERIALS
卷 6, 期 6, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.201502185
关键词
electrolyte additives; carbon anodes; high cycle life; solid electrolyte interfaces; sodium sulfur batteries
类别
资金
- German BMWi project BaSta [0325563A]
A novel combination of hard carbon anode sodium pre-loading and a tailored electrolyte is used to prepare room temperature sodium-sulfur full cell batteries. The electrochemical loading with sodium ions is realized in a specific mixture of diethyl carbonate, ethylene carbonate, and fluoroethylene carbonate electrolyte in order to create a first solid electrolyte interface (SEI) on the anode surface. Combining such anodes with a porous carbon/sulfur composite cathode results in full cells with a significantly decreased polysulfide shuttle when compared to half cells combined with metallic sodium anodes. Further optimization involves the use of Na2S/P2S5 doped tetraethylene glycol dimethyl ether based electrolyte in the full cell for the formation of a second SEI, reducing polysulfide shuttle even further. More importantly, the electrochemical discharge processes in the cell are improved by adding this dissolved complexation agent to the electrolyte. As a result of this combination sodium-sulfur cells with tailored cathode materials and electrolytes can achieve high discharge capacities up to 980 mAh g(sulfur)(-1) and 1000 cycles with 200 mAh g(sulfur)(-1) remaining capacity, at room temperature.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据