Preparation of Dendrimer-Sulfur Composites and their Application to Positive Active Material for Lithium Secondary Battery

树枝状聚合物-硫复合材料的制备及其在锂二次电池正极活性材料中的应用

• 批准号: 13680579
• 负责人: TSUTSUMI Hiromori
• 金额: $ 2.18万
• 依托单位: Yamaguchi University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13680579/
• 关键词: Disulfide; Positive Active Material; Dendrimer; Organosulfur compound; Lithium; Secondary Battery; Lipoid Acid; リポ酸; リボ酸; ジスルフイド; リチウムニ次電池; 硫黄; 充放電

A higher-power and thinner secondary battery will reduce the weight of potable electrical equipment, such as a cellular telephone and portable computer. Organosulfur compounds, such as 2, 5-dimercapto-1, 3, 4-thiadiazole (DMcT), which have polymerizable sulfur groups, are one of the most promising candidates of positive active materials for a high-energy storage secondary battery. We prepared new-type disulfide polymers that have a hyperbranch backbone and cyclic disulfide structures at the terminal of each branches. Their electrochemical behavior in an organic electrolyte and possibility as positive active material were investigated. Branched polyesters with cyclic disulfide structure were prepared from branched polyester and lipoic acid which has cyclic disulfide moiety. The structure of the polymers was identified from the results of FTIR, NMR, and MALDI-TOFF MASS spectroscopy. The electrodes with the hyperbranch polymers in the organic electrolyte solution (for example, the electrolyte solution form propylene carbonate, 1, 2-dimethoxyethane, and LiClO_4) showed electrochemical responses based on the cyclic disulfide. The redox potential and behavior of the disulfide bonds in the hyperbranch polymer depended on its branched structure. The capacity of the test cell with the positive electrode based on the compound was 27.9 - 54.8 Ah kg^<-1>.

更高功率和更薄的二次电池将减轻便携式电子设备的重量，如蜂窝电话和便携式电脑。有机硫化合物，如2,5 -二巯基- 1,3,4 -噻二唑（DMcT），具有可聚合的硫基团，是高能存储二次电池最有前途的正活性材料之一。我们制备了一种新型的二硫聚合物，它具有一个超分支的主链和每个分支末端的环状二硫结构。研究了它们在有机电解质中的电化学行为以及作为正极活性物质的可能性。以支链聚酯和含环二硫的硫辛酸为原料，制备了具有环二硫结构的支链聚酯。通过FTIR、NMR和MALDI-TOFF质谱对聚合物的结构进行了鉴定。在有机电解质溶液中（如由碳酸丙烯、1,2 -二甲氧基乙烷和LiClO_4组成的电解质溶液），具有超枝聚合物的电极表现出基于环二硫化物的电化学响应。超支聚合物中二硫键的氧化还原电位和行为取决于其支化结构。基于该化合物的正极测试电池的容量为27.9 ~ 54.8 Ah kg^<-1>。

项目成果

Hiromori Tsutsumi, Tomoyuki Nakagawa, Kenjiro Onimura, Tsutomu Oishi: "Preparation of Hyperbranch Polymer with Cyclic Disulfide and its Application to Positive Active Material of Secondary Batter"Abstract of the 14th Symposium of the Materials Research So

Hiromori Tsutsumi、Tomoyuki Nakakawa、Kenjiro Onimura、Tsutomu Oishi：《环状二硫化物超支化聚合物的制备及其在二次电池正极活性材料中的应用》第十四届材料研究学会学术研讨会摘要

堤 宏守(分担執筆): "次世代型リチウム二次電池"株式会社エヌ・ティー・エス(未定). (2003)

Hiromori Tsutsumi（贡献者）：“下一代锂二次电池”NTS Co., Ltd.（待定）（2003 年）。

Hiromori Tsutsumi 他3名: "Preparation of Hyperbranch Polymer with Cyclic Disulfide and its Application to Positive Active Material of Secondary Battery"Transactions of the Materials Research Society of Japan. (掲載予定). (2003)

Hiromori Tsutsumi等3人：“环状二硫化物的超支化聚合物的制备及其在二次电池正极活性材料中的应用”，日本材料研究学会会刊（即将出版）。

Hiromori Tsutsumi 他3名: "Preparation of Hyperbranch Polymer with Cyclic Disulfide and its Application to Positive Active Material of Secondary Battery"Transactions of the Materials Research Society of Japan. (掲載予定)(未定). (2003)

Hiromori Tsutsumi等3人：“环状二硫化物的超支化聚合物的制备及其在二次电池正极活性材料中的应用”日本材料研究学会会刊（待出版）（待定）（2003年）。