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High loading of active materials at the cathode is essential to realise the high energy density potential of Li-S batteries, but conventional cathodes have a non-compact structure that severely limits the active material loading. Tan et al. report that by burning Li foils in a CS2 vapour, highly compact Li2S–graphene nanocapsules are obtained (represented here) that can be used in high-performing Li-S batteries.
See Tan et al. 2, 17090 (2017) and News and Views by Li & Chen, article 17096.
Image: Guoqiang Tan and Jun Lu. Cover design: Alex Wing.
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