Understanding of Sulfurized Polyacrylonitrile for Superior Performance Lithium/Sulfur Battery

Energies

关键词: lithium-sulfur battery;    sulfur cathode;    sulfurized carbon;    sulfurized polyacrylonitrile;    polysulfide;   

DOI  :  10.3390/en7074588

来源: mdpi

【 摘 要 】

Sulfurized polyacrylonitrile (SPAN) is one of the most important sulfurized carbon materials that can potentially be coupled with the carbonaceous anode to fabricate a safe and low cost “all carbon” lithium-ion battery. However, its chemical structure and electrochemical properties have been poorly understood. In this discussion, we analyze the previously published data in combination with our own results to propose a more reasonable chemical structure that consists of short –S_x– chains covalently bonded onto cyclized, partially dehydrogenated, and ribbon-like polyacrylonitrile backbones. The proposed structure fits all previous structural characterizations and explains many unique electrochemical phenomena that were observed from the Li/SPAN cells but have not been understood clearly.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.