R&D OF IMPROVED LI ELECTRODE FOR HIGH ENERGY BATTERIES

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• 批准号: 3507810
• 负责人: MORRIS EISENBERG
• 金额: $ 22.75万
• 依托单位: ELECTROCHIMICA CORPORATION
• 依托单位国家: 美国
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-03-01 至 1989-02-28
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/3507810
• 关键词: auxiliary heart prosthesis; biomedical device power system; biomedical equipment resource; clinical biomedical equipment; electrochemistry; electrodes; electrolytes; implant; lithium; oxidation reduction reaction; solubility

High energy rechargeable lithium batteries would be of great importance for the entire field of heart pump development and other implantable or portable medical or biomedical devices, providing energy densities well in excess of what nickel-cadmium batteries deliver at present. Future progress in this area is shown to depend on successful development of a lithium electrode (anode) with desirable rechargeability characteristics. The basic criteria for rechargeability of lithium anodes are discussed as well as anode electrocrystallization. A multicomponent approach to electrolyte design is described in which cosolvent mixing is shown to provide desirable properties as a result of synergistic effects. A strong case for future development of reducible-type cathodes is presented since cathode selection is shown to affect criteria for attainment of desirable electrolytes. Results of the Phase I program are presented. Electrolytes are described which satisfy the criteria for Li cell rechargeability including high specific conductivity to enable high discharge rates, a stable potential window, and a high Coulombie Li stripping efficiency to enable long cycle life.

高能量可充电锂电池将是伟大的 对于整个心脏泵开发领域的重要性， 其它可植入或便携式医疗或生物医学装置， 提供的能量密度远远超过镍镉 电池目前已上市 显示了这一领域的未来进展 依靠锂电极的成功开发， （阳极）具有期望的可再充电性特性。 基本 讨论了锂阳极可充电性的判据 作为阳极电结晶。 一种多成分方法， 描述了电解质设计，其中示出了共溶剂混合 以提供作为协同效应的结果的所需性能。 还原型阴极未来发展的有力案例 阴极的选择是影响标准， 获得所需的电解质。 第一阶段计划的结果。 电解质 描述了满足Li电池可再充电性标准的 包括高比电导率以实现高放电 速率，稳定的电位窗口，以及高的库仑Li 汽提效率高，循环寿命长。