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Sulfur was partially embedded into MWCNTs via liquid-phase infiltration and heating process.
Sulfur was mixed with MWCNTs using a planetary ball mill.
S-incorporated MWCNT cathode shows less formation of passive layer upon cycling.
S-mixed MWCNT cathode shows severe agglomeration of active materials upon cycling.
S-incorporated MWCNT composite shows enhanced electrochemical performances.