▎ 摘　　要

Lithium-sulfur batteries show fascinating potential applications for rapid-growing electric vehicles and grid-level energy storage due to their low cost and high energy density. To date, various carbon hosts have been utilized to confine sulfur for improving Li-S battery performance. However, the adopted sulfur storage techniques are post-carbon-synthesis involving complex processes. It remains a great challenge to determine the ideal configuration of carbon-sulfur composites with uniform dispersion and high sulfur loading. Herein, we report a novel synthesis of graphene-sulfur composites by electrolytic exfoliation of graphite coupled with in situ sulfur electrodeposition. The sample delivers an initial discharge capacity of 1080 mA h g(-1) at 0.1 A g(-1) and retains above 900 mA h g(-1) over 60 cycles. This strategy via electrochemical exfoliation/deposition synchronous reactions can provide strong sulfur chemical interactions with the graphene host, achieving advanced cathode materials for Li-S batteries.