R & D OF IMPROVED LI ELECTRODE FOR HIGH-ENERGY BATTERIES

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• 批准号: 3507811
• 负责人: MORRIS EISENBERG
• 金额: $ 2.31万
• 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 1990-08-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/3507811
• 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.

高能可充电锂电池将非常有用 对整个心泵开发领域的重要性和 其他可植入或便携式医疗或生物医学设备， 提供的能量密度远远超过镍-镉 目前，电池正在送货。展示了这一领域的未来进展 依赖于锂电极的成功开发 (阳极)具有理想的可充性特性。最基本的 还讨论了锂阳极可充电性的判据。 作为阳极电结晶。采用多组件方法来实现 描述了电解液的设计，其中显示了助溶剂的混合 以作为协同效应的结果来提供所需的特性。 未来可缩放型阴极发展的有力证据 是因为阴极的选择被证明会影响 达到理想的电解液。 给出了第一阶段程序的结果。电解液是 描述了满足锂电池可充电性标准的 包括高比电导率以实现高放电 利率、稳定的势窗和高库伦比李 剥离效率，使循环寿命更长。