globalchange  > 气候变化与战略
DOI: 10.1073/pnas.1620809114
论文题名:
Ultrathin dendrimer-graphene oxide composite film for stable cycling lithium-sulfur batteries
作者: Liu W.; Jiang J.; Yang K.R.; Mi Y.; Kumaravadivel P.; Zhong Y.; Fan Q.; Weng Z.; Wu Z.; Cha J.J.; Zhou H.; Batista V.S.; Brudvig G.W.; Wang H.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2017
卷: 114, 期:14
起始页码: 3578
结束页码: 3583
语种: 英语
英文关键词: Dendrimer ; Graphene oxide ; Lithium-sulfur battery ; Long cycle ; Ultrathin composite film
Scopus关键词: dendrimer ; graphene oxide ; lithium ; nanosheet ; polyamidoamine ; sulfide ; sulfur ; Article ; cycling ; density ; electrode ; energy ; film ; priority journal
英文摘要: Lithium-sulfur batteries (Li-S batteries) have attracted intense interest because of their high specific capacity and low cost, although they are still hindered by severe capacity loss upon cycling caused by the soluble lithium polysulfide intermediates. Although many structure innovations at the material and device levels have been explored for the ultimate goal of realizing long cycle life of Li-S batteries, it remains a major challenge to achieve stable cycling while avoiding energy and power density compromises caused by the introduction of significant dead weight/volume and increased electrochemical resistance. Here we introduce an ultrathin composite film consisting of naphthalimide-functionalized poly(amidoamine) dendrimers and graphene oxide nanosheets as a cycling stabilizer. Combining the dendrimer structure that can confine polysulfide intermediates chemically and physically together with the graphene oxide that renders the film robust and thin (<1% of the thickness of the active sulfur layer), the composite film is designed to enable stable cycling of sulfur cathodes without compromising the energy and power densities. Our sulfur electrodes coated with the composite film exhibit very good cycling stability, together with high sulfur content, large areal capacity, and improved power rate.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/163855
Appears in Collections:气候变化与战略

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作者单位: Liu, W., Department of Chemistry and Energy Sciences Institute, Yale University, West Haven, CT 06516, United States; Jiang, J., Department of Chemistry and Energy Sciences Institute, Yale University, West Haven, CT 06516, United States; Yang, K.R., Department of Chemistry and Energy Sciences Institute, Yale University, West Haven, CT 06516, United States; Mi, Y., Department of Chemistry and Energy Sciences Institute, Yale University, West Haven, CT 06516, United States, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China; Kumaravadivel, P., Department of Mechanical Engineering and Materials Science, Yale University, New Haven, CT 06511, United States; Zhong, Y., Department of Chemistry and Energy Sciences Institute, Yale University, West Haven, CT 06516, United States; Fan, Q., Department of Chemistry and Energy Sciences Institute, Yale University, West Haven, CT 06516, United States, School of Chemistry and Chemical Engineering, Southeast University, Nanjing, Jiangsu, 211189, China; Weng, Z., Department of Chemistry and Energy Sciences Institute, Yale University, West Haven, CT 06516, United States; Wu, Z., Department of Chemistry and Energy Sciences Institute, Yale University, West Haven, CT 06516, United States; Cha, J.J., Department of Mechanical Engineering and Materials Science, Yale University, New Haven, CT 06511, United States, Center for Research on Interface Structures and Phenomena, Yale University, New Haven, CT 06511, United States; Zhou, H., College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China; Batista, V.S., Department of Chemistry and Energy Sciences Institute, Yale University, West Haven, CT 06516, United States; Brudvig, G.W., Department of Chemistry and Energy Sciences Institute, Yale University, West Haven, CT 06516, United States; Wang, H., Department of Chemistry and Energy Sciences Institute, Yale University, West Haven, CT 06516, United States

Recommended Citation:
Liu W.,Jiang J.,Yang K.R.,et al. Ultrathin dendrimer-graphene oxide composite film for stable cycling lithium-sulfur batteries[J]. Proceedings of the National Academy of Sciences of the United States of America,2017-01-01,114(14)
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