TY - JOUR AB - © 2019 The Royal Society of Chemistry. The lithium-sulfur (Li-S) system is one of the most promising rechargeable battery systems for portable electronics and electrification of vehicles due to a high theoretical capacity and energy density, as well as the low cost and availability of non-toxic sulfur. Polysulfide dissolution however hinders cycling performance and is the main limitation to the stability of the Li-S system. Here, we tackle this challenge by synthesizing 3D-graphene foam from soybean oil through a thermal chemical vapor deposition (CVD) process, which is subsequently loaded with sulfur to form a 3D-graphene-sulfur composite (denoted as S@G composite). The synthesized S@G composite shows high initial discharge capacity (?1300 mA h g -1 at 0.8 A g -1 ) and capacity retention (?80% after 200 cycles). Furthermore, a thin layer (?100 nm) of tungsten oxide (WO 3 ) on the S@G composite dramatically improves the cycling performance of the Li-S system with an initial capacity of 1425 mA h g -1 and approximately 95% capacity retention after 500 cycles. The analysis and theoretical calculation results prove that the novel material and approach can enhance the electrochemical performance of rechargeable Li-S batteries and shed light on developing high-performance energy storage devices for a variety of applications. AU - Choi, S AU - Seo, DH AU - Kaiser, MR AU - Zhang, C AU - Van Der Laan, T AU - Han, ZJ AU - Bendavid, A AU - Guo, X AU - Yick, S AU - Murdock, AT AU - Su, D AU - Lee, BR AU - Du, A AU - Dou, SX AU - Wang, G DA - 2019/01/01 DO - 10.1039/c8ta11646f EP - 4603 JO - Journal of Materials Chemistry A PY - 2019/01/01 SP - 4596 TI - WO 3 nanolayer coated 3D-graphene/sulfur composites for high performance lithium/sulfur batteries VL - 7 Y1 - 2019/01/01 Y2 - 2024/03/28 ER -