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. 2016 Sep 15;6:33154. doi: 10.1038/srep33154

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Copyright © 2016, The Author(s)

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(a) ICE data of the Li-S cells with the introduction of different transition metal oxides on graphite substrate. (b) HAADF-STEM image of RuO₂-MWCNTs composite. (c,d) Galvanostatic discharge-charge voltage profiles of the cell with RuO₂ catalyst cycled in LiNO₃-free electrolyte (top) and the bared MWCNTs-sulfur electrode cycled in the electrolyte with 2.0 wt% of LiNO₃ additive (bottom) at the cycling rate of C/20 (from 1^st to 30^th cycle) and C/2 (in 5^th, 50^th, 100^th, 150^th, 200^th, 250^th and 300^th cycle). (e) Comparison of the cycling performance of the cell with RuO₂ catalyst and that with LiNO₃ additive (at C/2). The cells were first stabilized at C/20 for 3 times.