31 May '15, 4pm

Reduced graphene oxide #rGO separator improves performance of #Li-sulfur battery

Reduced graphene oxide separator improves performance of Li-sulfur battery 31 May 2015 Researchers in have shown that a lithium-sulfur (Li-S) battery with a reduced graphen oxide (rGO) -coated separator exhibits much smaller impedance and much better electrochemical performance than cells with an uncoated separator. After coating with rGO, the initial discharge capacity can be as large as 1067 mAh g−1 at 0.2 C; the cell can retain 878 mAh g−1 after 100 cycles; and the discharge capacity can reach 710 mAh g−1 even at 2 C. The team attributed the significant performance enhancement to the bi-functionality of rGO; the rGO coating layer has a unique porous structure, high conductivity and various kinds of functional groups, which can not only effectively prevent the diffusion of polysulfide through the separator, but also significantly increase the conducting surface between c...

Full article: http://www.greencarcongress.com/2015/05/20150531-rgo.html

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