Stabilization of Insoluble Discharge Products by Facile Aniline Modification for High Performance Li‐S Batteries |
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| Authors: | Jae Ho Kim Taehoon Kim Yo Chan Jeong Kunsil Lee Kyung Tae Park Seung Jae Yang Chong Rae Park |
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| Affiliation: | Carbon Nanomaterials Design Laboratory, Global Research Laboratory, Research Institute of Advanced Materials, Department of Materials Science and Engineering, Seoul National University, Seoul, South Korea |
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| Abstract: | Continuous efforts have been made to attain high performance Li‐S batteries by preventing loss of soluble polysulfides, whereas issues related to insoluble discharge products, Li2S2 and Li2S, have been underestimated. A facile and mild method, diazotization, that enables uniform functionalization on the surface of ordered mesoporous carbon (CMK‐3) with aniline functional groups while not deteriorating the original CMK‐3 microstructure is demonstrated. The aniline groups possess favorable interactions with insoluble discharge products. Thus, they homogeneously distribute the insoluble discharge products during cycling. The proposed materials exhibit outstanding electrochemical properties with regard to stability (920 mAh g?1 at 0.2 C after 100 cycles) and rate capability (814 mAh g?1 at 1 C) when evaluated as a cathode material for Li‐S batteries. |
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| Keywords: | aniline diazotization high performance insoluble discharge products Li‐S batteries |
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