Journal
NANOTECHNOLOGY
Volume 32, Issue 28, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1361-6528/abf4a8
Keywords
microwave; graphene; practical application; lithium-sulfur batteries
Funding
- Key Research Program of Shaanxi Province [2017ZDXM-GY-035]
- National Natural Science Foundation of China [NSFC-51707151, 51772241]
- Independent Research Project of National Key Laboratory of Electrical Insulation and Power Equipment [EIPE19111]
- Natural Science Foundation of Jiangsu Province [BK20190222]
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An ultra-fast and facile method using microwave assistance has been proposed to prepare sulfur/graphene composites for lithium-sulfur batteries. This method allows sulfur to quickly and uniformly deposit on the surface of graphene within just 30 seconds, producing nano-sized sulfur particles. The lithium-sulfur batteries made with these composites exhibit good cycling life with a capacity of 503.5 mAh g(-1) at 0.2 C, making practical application possible.
Lithium-sulfur batteries are one of the most promising energy storage systems due to their high energy density. Many efforts have been made to improve the electrochemical performance of lithium-sulfur batteries. However, the complex and time-consuming preparation process hinders their practical application. In this work, an ultra-fast and facile method has been proposed to prepare the sulfur/graphene composites in a simplified and time-saving preparation process with the assistance of microwave. Microwave is introduced to help sulfur fleetly deposit uniformly on the surface of graphene within just 30 s. Nano-sized sulfur within 30 nm is generated in this ultra-fast process. Lithium-sulfur batteries with as-prepared sulfur/graphene composites exhibit good cycling life with a capacity of 503.5 mAh g(-1) at 0.2 C. This method makes it possible for lithium-sulfur batteries to be practical.
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