Electrochemical properties of modified acetylene black/sulfur composite cathode material for lithium/sulfur batteries
- 218 Downloads
Lithium/sulfur (Li/S) batteries have a high theoretical specific capacity of 1672 mAh g−1. However, the insulation of the elemental sulfur and polysulfides dissolution could result in poor cycling performance of Li/S batteries, thus restricting the industrialization process. Here, we prepared sulfur-based composite by thermal treatment. The modified acetylene black (H-AB) was used as a carrier to fix sulfur. The H-AB could interact with polysulfides and reduce the dissolution of polysulfides in the electrolyte. Nonetheless, the conductivity of H-AB relatively reduced. So the conductivity of the sulfur electrode would be improved by the addition of the conductive agent (AB). In this paper, the different content of conductive agent (AB) in the sulfur electrode was studied. The electrochemical tests indicate that the discharge capacity of the sulfur electrode can be increased by increasing the conductive agent (AB) content. The H-AB@S composite electrode with 30 wt.% conductive agent has the best cycle property. The discharge capacity still remains at 563 mAh g−1 after 100 cycles at 0.1 C, which is 71% retention of the highest discharge capacity.
KeywordsLithium/sulfur battery Cathode material Modified acetylene black Conductive agent Cycle performance
We gratefully acknowledge the financial support from Shanxi Science and Technology Foundation Platform Construction Projects (2015091011) and Jincheng Science and Technology Planning Projects (201501004-21).
- 3.Dong QF, Wang C, Zheng MS (2011) Research progress and prospects of lithium sulfur batteries. Prog Chem 23:533–539Google Scholar
- 5.Peng XX, Lu YQ, Zhou LL, Sheng T, Shen SY, Liao HG, Huang L, Li JT, Sun SG (2017) Graphitized porous carbon materials with high sulfur loading for lithium-sulfur batteries. Nano Energy 3:53–510Google Scholar
- 9.Chen FB, Wang YN, Wu BR, Xiong YK, Liao WL, Wu F, Sun Z (2014) Preparation and electrochemical performance of activation graphene/sulfur complex cathode material for lithium-sulfur batteries. J Inorg Mater 29:627–632Google Scholar
- 11.Xu GY, Ding B, Nie P, Luo HJ, Zhang XG (2013) Preparation and electrochemical performance of carbon nanotubes/graphene oxide/sulfur complex cathode material. Acta Phys Chem Sin 29:546–552Google Scholar
- 20.Liang X, Wen ZY, Liu Y, Wang XY, Zhang H, Wu MF, Huang LZ (2011) Preparation and characterization of sulfur-polypyrrole composites with controlled morphology as high capacity cathode for lithium batteries. Solid State Ionics 192(1):347–350. https://doi.org/10.1016/j.ssi.2010.07.016 CrossRefGoogle Scholar
- 21.Wei P, Fan MQ, Chen HC, Yang XR, Wu HM, Chen JD, Li T, Zeng LW, Li CM, Ju QJ, Chen D, Tian GL, Lv CJ (2016) Enhanced cycle performance of hollow polyaniline sphere/sulfur composite in comparison with pure sulfur for lithium sulfur batteries. Renew Energ 86:148–153. https://doi.org/10.1016/j.renene.2015.08.005 CrossRefGoogle Scholar
- 31.Peng ZH, Fang WY, Zhao HB, Fang JH, Cheng HW, Doan TNL, Xu JQ, Chen P (2015) Graphene-based ultrathin microporous carbon with smaller sulfur molecules for excellent rate performance of lithium-sulfur cathode. J Power Sources 282:70–78. https://doi.org/10.1016/j.jpowsour.2015.01.180 CrossRefGoogle Scholar