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WO3 nanolayer coated 3D-graphene/sulfur composites for high performance lithium/sulfur batteries

Journal Article


Abstract


  • 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.

Authors


  •   Choi, Sinho (external author)
  •   Seo, Donghan (external author)
  •   Kaiser, Mohammad R. (external author)
  •   Zhang, Chunmei (external author)
  •   van der Laan, Timothy (external author)
  •   Han, Zhao Jun. (external author)
  •   Bendavid, Avi (external author)
  •   Guo, Xin (external author)
  •   Yick, Samuel (external author)
  •   Murdock, Adrian (external author)
  •   Su, Dawei (external author)
  •   Lee, Bo (external author)
  •   Du, Aijun (external author)
  •   Dou, Shi Xue
  •   Wang, Guoxiu (external author)

Publication Date


  • 2019

Citation


  • Choi, S., Seo, D., Kaiser, M. Rejaul., Zhang, C., van der Laan, T., Zhao, J., Bendavid, A., Guo, X., Yick, S., Murdock, A. T., Su, D., Lee, B. Ram., Du, A., Dou, S. Xue. & Wang, G. (2019). WO3 nanolayer coated 3D-graphene/sulfur composites for high performance lithium/sulfur batteries. Journal of Materials Chemistry A, 7 (9), 4596-4603.

Scopus Eid


  • 2-s2.0-85062285185

Number Of Pages


  • 7

Start Page


  • 4596

End Page


  • 4603

Volume


  • 7

Issue


  • 9

Place Of Publication


  • United Kingdom

Abstract


  • 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.

Authors


  •   Choi, Sinho (external author)
  •   Seo, Donghan (external author)
  •   Kaiser, Mohammad R. (external author)
  •   Zhang, Chunmei (external author)
  •   van der Laan, Timothy (external author)
  •   Han, Zhao Jun. (external author)
  •   Bendavid, Avi (external author)
  •   Guo, Xin (external author)
  •   Yick, Samuel (external author)
  •   Murdock, Adrian (external author)
  •   Su, Dawei (external author)
  •   Lee, Bo (external author)
  •   Du, Aijun (external author)
  •   Dou, Shi Xue
  •   Wang, Guoxiu (external author)

Publication Date


  • 2019

Citation


  • Choi, S., Seo, D., Kaiser, M. Rejaul., Zhang, C., van der Laan, T., Zhao, J., Bendavid, A., Guo, X., Yick, S., Murdock, A. T., Su, D., Lee, B. Ram., Du, A., Dou, S. Xue. & Wang, G. (2019). WO3 nanolayer coated 3D-graphene/sulfur composites for high performance lithium/sulfur batteries. Journal of Materials Chemistry A, 7 (9), 4596-4603.

Scopus Eid


  • 2-s2.0-85062285185

Number Of Pages


  • 7

Start Page


  • 4596

End Page


  • 4603

Volume


  • 7

Issue


  • 9

Place Of Publication


  • United Kingdom