STUDIES ON ORGANIC ELECTROLYTES FOR BATTERIES

电池用有机电解质的研究

• 批准号: 60490015
• 负责人: MATSUDA YOSHIHARU
• 金额: $ 3.78万
• 依托单位: YAMAGUCHI UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1985
• 资助国家: 日本
• 起止时间: 1985 至 1986
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-60490015/
• 关键词: Lithium Battery; Organic Electrolyte; Electrolytic Conductivity; Charge-Discharge Characteristics; 電極-電解液界面構造

Several combinations of organic solvents and lithium (Li) salts were examined as the electrolytes of ambient temperature Li batteries. Propylene carbonate (PC), sulfolane (SL), and dimethyl sulfoxide (DMSO) were used as the high permittivity solvents, and 1,2-dimethoxyethane (DME), tetrahydrofuran (THF) and the like were used as the low viscosity solvents. The conductivity of Li salts was improved by blending the solvents, ie. maximum conductivities were obtained in the mixed solvent systems. The <LiPF_6> solutions had much higher conductance than those of <LiClO_4> or <LiBF_4> , especially in the mixed solvent systems. The charge-discharge cycling efficiency of the Li negative electrode was markedly dependent not only on the solvent composition but the electrolytic salt. Higher efficiencies were observed in the electrolytes with higher conductivities. The highest efficiency on the Ni substrate was obtained in <LiPF_6> /DMSO(or SL)-DME. High rechargeability of Li was also expected in the solution containing <LiClO_4> or <LiBF_4> when Al was used as the substrate. The addition of crown ethers was effective for the improvements in the electrolytic conductivity of the PC-based solution and the recharge-ability of the Li/ <TiS_2> cell.

考察了有机溶剂和锂盐的几种组合作为室温锂电池的电解质。使用碳酸丙烯酯（PC）、环丁砜（SL）和二甲亚砜（DMSO）作为高介电常数溶剂，使用1，2-二甲氧基乙烷（DME）、四氢呋喃（THF）等作为低粘度溶剂。采用溶剂共混的方法提高了锂盐的电导率。在混合溶剂体系中获得最大电导率。溶液<LiPF_6>的电导率远高于<LiClO_4>或<LiBF_4>，特别是在混合溶剂体系中。锂负极的充放电循环效率不仅与溶剂组成有关，而且与电解质盐有关。在具有较高电导率的电解质中观察到较高的效率。在/DMSO（或SL）-DME中获得了在Ni基底上的最高效率<LiPF_6>。在含有Al的溶液中或当Al用作基底时，也预期Li的高可再充电性<LiClO_4><LiBF_4>。冠醚的加入有效地改善了PC基溶液的电导率和Li/ cell的可充电性<TiS_2>。

项目成果

M. MORITA: "Charge-Discharge Characteristics of the Lithium Electrode in Mixed Ether Electrolytes" Electrochim. Acta. 31. 573-578 (1986)

M. MORITA：“混合醚电解质中锂电极的充放电特性”Electrochim。

松田好晴: 電気化学. 53. 828-830 (1985)

松田义治：电化学 53. 828-830 (1985)

Y. TAKASU: "Electrochemical Intercalation of Lithium in an Active Carbon" J. Electrochem. Soc.132. 2290-2290 (1985)

Y. TAKASU：“活性炭中锂的电化学嵌入”J. Electrochem。

M. MORITA: "Lithium Cycling Efficiency on the Aluminum Substrate in Blended Sulfolane-Ether System" J. Electrochem. Soc.

M. MORITA：“混合环丁砜-醚体系中铝基板上的锂循环效率”J. Electrochem。

Y.MATSUDA: J.Electrochem.Soc.132. 2538-2543 (1985)

Y.松田：J.Electrochem.Soc.132。