Study on urea precursor effect on the electroactivities of nitrogen-doped graphene nanosheets electrodes for lithium cells
(주)코리아스칼라
- 최초 등록일
- 2023.04.05
- 최종 저작일
- 2016.09
- 7페이지/ 어도비 PDF
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서지정보
ㆍ발행기관 : 한국탄소학회
ㆍ수록지정보 : Carbon letters / 19권
ㆍ저자명 : Ki-Yong Kim, Yongju Jung, Seok Kim
영어 초록
Nitrogen-atom doped graphene oxide was considered to prevent the dissolution of polysulfide and to guarantee the enhanced redox reaction of sulfur for good cycle performance of lithium sulfur cells. In this study, we used urea as a nitrogen source due to its low cost and easy preparation. To find the optimum urea content, we tested three different ratios of urea to graphene oxide. The morphology of the composites was examined by field emission scanning electron microscope. Functional groups and bonding characterization were measured by X-ray photoelectron spectroscopy. Electrochemical properties were characterized by cyclic voltammetry in an organic electrolyte solution. Compared with thermally reduced graphene/sulfur (S) composite, nitrogen-doped graphene/S composites showed higher electroactivity and more stable capacity retention.
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