Keywords
adsorption
cathode material
Li–S battery
lithium polysulfides.
microporous carbon
sulfur
Abstract
In this work, a new cathode material for lithium-sulfur (Li-S) batteries was developed. Microporous carbon (with predominant pore size £1.2 nm) served as both a matrix for sulfur retention and conductive additive. Microporous carbon was shown to be capable of adsorbing lithium polysulfides thereby suppressing their migration toward lithium anode. The discharge capacity of the S/C composite at the 1st and 20th cycles in Li-S battery operation was 513 and 421 mAh g-1 at a scan rate of 0.1 mV s-1.
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