THE APPLICATION AND RESEARCH OF KINDS OF BINDERS IN LITHIUM SULFUR BATTERY (FONT ARIAL, SIZE 11, BOLD)
As the power requirements increase, demands for high energy density of secondary batteries are ever increasing. Lithium sulfur battery was studied extensively in recent years, and was thought to be one of the most promising batteries because of its cathode theoretical specific capacity of 1675mAh/g. Two main disadvantages are low conductivity of S and the capacity fading result from shuttle effect, and now many researchers were hammering at these problems. Aiming to improve the surface density and life cycle, the purpose of this study researched which kind of binder can be used to improve the cathodc surface density, how to use, and whether to advance the cycle performance. The results explored that: although the cycle performance of the PVDF binder was the best compared with the other two, the surface density is greatly limited by coating method, due to the NMP was used as dispersant. Lithiatednafion and PEO binders are environmental friendly as they can be dispersed in innocuous distilled water. The aqueous slurry can be sprayed on the current collector as much as you wanted, which is beneficial to high surface density cathode; through the cycle life test, the battery in which PEO binder was used has a better capability compared with the one in which nafion was used. In addition, PEO binder can decrease sulfur dissolution by reducing the contact of element sulfur with electrolyte, because that sulfur can be enwrapped by PEO.
lithium sulfur battery cathode binder surface density cycle performance
Qian Wang Huamin Zhang Yining Zhang Meiri Wang
Energy storage division, Dalian Institute of Chemical Physics, China Academy of Sciences, Dalian, 116023, China
国际会议
大连
英文
116
2012-05-28（万方平台首次上网日期，不代表论文的发表时间）