Preparation of Reduced Graphene Oxide Aerogel and its Application in Lithium Sulfur Battery
International Journal of Electrochemical Science, ISSN: 1452-3981, Vol: 12, Issue: 12, Page: 11108-11121
2017
- 1Citations
- 9Captures
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Article Description
A facile method was used to prepare novel nitrogen-doped sulfur-based compound material coated with reduced-graphene-oxide aerogel NCNT/S(RGO-gel) composite. As coating layer, the material was systematically studied through X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy, and electrochemical test. NCNT/S(RGO-gel) electrode showed first discharge specific capacity of 1403.7 mAh·g -1 under 500 mA/g density. The material also exhibited outstanding rate capability and long-term cycle stability. Results showed that RGO-gel coated composite electrode retained its discharge specific capacity of 912.4 mAh/g after 175 cycles under 500 mA/g current density. The composite electrode presented capacity retention rate of 80%. Improved electrochemical performance was mainly ascribed to RGO-gel, which not only reduced dissolution of sulfur polymer (S n 2- ) but also significantly improved conductivity. NCNT also served as bridge between RGO-gel layers, significantly shortening the path for lithium-ion transport. Thus, novel NCNT/S(RGO-gel) composite can act as potential positive electrode for high performance Li–S batteries.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S1452398123148693; http://dx.doi.org/10.20964/2017.12.450; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85038247232&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/S1452398123148693; https://dx.doi.org/10.20964/2017.12.450
Elsevier BV
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