| 학회 |
한국공업화학회 |
| 학술대회 |
2014년 봄 (04/30 ~ 05/02, 제주국제컨벤션센터) |
| 권호 |
18권 1호 |
| 발표분야 |
포스터-전기화학 |
| 제목 |
graphene quantum dots (GQDs) surface functionalization to enhance the cycle stability and electron pathway on lithium sulfur batteries |
| 초록 |
Recently, sulfur has been considered as a promising material lithium rechargeable battery cathode due to a superior specific capacity of 1672 mAh/g to other traditional metal oxides/phosphates cathodes, abundant resources, low cost, and environmental friendliness. Despite these advantages, it has been faced with rapid capacity fading due to dissolution of polysulfide and precipitation of lithium polysulfides. Furthermore, low electrical conductivity of sulfur leads to low utilization of the active materials as a sulfur electrode. To make up for the weak points of lithium sulfur batteries, many researchers have studied various methods to overcome these problems by controlling matrix and additive of liquid electrolyte. In this study, graphene quantum dots (GQDs) were used to surface functionalizer that were able to support electron path and alleviate dissolution of polysulfide, which have a role in conducting agents and various functional additives, results in high specific capacity and good cycle ability in lithium sulfur batteries |
| 저자 |
박정진1, 김귀룡2, 이경재3, 김정준1, 성영은2
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| 소속 |
1Center for Nanoparticle Research, 2Institute for Basic Science / School of Chemical and Biological Engineering, 3Seoul National Univ. |
| 키워드 |
graphene quantum dots; surface functionalization; sulfur utilization; Li-S secondary batteries
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| E-Mail |
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