A 3D multifunctional architecture for lithium-sulfur batteries with high areal capacity

Shiyong Zhao, Ruopian Fang, Zhenhua Sun, Shaogang Wang, Jean-Pierre Veder, Martin Saunders, Hui-Ming Cheng, Chang Liu, San Ping Jiang, Feng Li

Research output: Contribution to journalArticle

Abstract

Lithium-sulfur (Li-S) batteries are highly attractive as next-generation electrochemical energy-storage technologies because they can provide a high energy density at a low cost. However, the performance degradation of sulfur cathodes with high mass loadings remains a significant challenge to be addressed. Here, a 3D multifunctional integrated and sponge-like architecture is designed as the cathode framework, which provides a favorable balance between high sulfur loadings and uncompromised electrochemical performances. In this architecture, a highly porous nitrogen-doped carbon fiber foam is used as a 3D current collector and host for sulfur accommodation and a thin graphene layer is used for polysulfide interception, which not only facilitates fast electron and lithium-ion transport but also enables effective active material immobilization by both physical restriction and chemical adsorption. With a sulfur loading of 7.7 mg cm(-2), high areal capacities up to 8.7 mAh cm(-2) are attained together with excellent cycling stability over 500 cycles. This approach demonstrates a new concept for the construction of cathode architectures for practical Li-S batteries and can be extended to other battery systems.

Original languageEnglish
Article number1800067
Number of pages9
JournalSmall methods
Volume2
Issue number6
DOIs
Publication statusPublished - 12 Jun 2018

Cite this

Zhao, S., Fang, R., Sun, Z., Wang, S., Veder, J-P., Saunders, M., Cheng, H-M., Liu, C., Jiang, S. P., & Li, F. (2018). A 3D multifunctional architecture for lithium-sulfur batteries with high areal capacity. Small methods, 2(6), [1800067]. https://doi.org/10.1002/smtd.201800067