ACT/SGER: Improving the Lifetimes of Batteries: NMR Studies of Structure and SEI Formation

ACT/SGER：提高电池寿命：结构和 SEI 形成的 NMR 研究

• 批准号: 0442181
• 负责人: Clare Grey
• 金额: --
• 依托单位: SUNY at Stony Brook
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-09-15 至 2006-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0442181&HistoricalAwards=false
• 关键词: ACT; SGER; Improving; Lifetimes; Batteries

Two related exploratory projects will be performed, which will provide information concerning the mechanisms of cell failure and will aid in the development of new, improved electrode materials for use in lithium-ion batteries: (i) The preparation and investigation of nano-sized LiCoO2 cathode materials, and (ii) the development of nuclear magnetic resonance (NMR) methods to study thin-film electrodes such as amorphous silicon. Through these projects, we will explore correlations between size, morphology and structure, and the effect of these parameters on electrochemical performance. Systems where the solid electrolyte interphase (SEI) is a much higher fraction of the bulk will be prepared allowing the SEI to be readily investigated by NMR spectroscopy, the primary characterization method used in this research program. The SEI is the film that forms on the electrode particles on battery assembly and grows on cycling, and is a source of capacity loss (and eventually cell failure).Longer lasting, lighter and more compact electrochemical power sources are required to power many of the devices used by the intelligence community. Lithium-ion batteries represent one such power source. In order to improve these batteries, both an increased understanding of the battery failure mechanisms and the development of new, higher capacity electrodes are required. The Approaches to Combat Terrorism Program in the Directorate for Mathematics and Physical Sciences supports new concepts in basic research and workforce development with the potential to contribute to national security.

将执行两个相关的探索性项目，这些项目将提供有关细胞衰竭机制的信息，并将有助于开发用于锂离子电池中的新的，改进的电极材料：（i）纳米大小的LICOOO2的准备和调查阴极材料和（ii）研究薄膜电极（如无定形硅）的核磁共振（NMR）方法的发展。 通过这些项目，我们将探索大小，形态和结构之间的相关性，以及这些参数对电化学性能的影响。 固体电解质相（SEI）的系统将被制备更高的大部分，从而使SEI很容易通过NMR光谱进行研究，NMR光谱是该研究计划中使用的主要特征方法。 SEI是在电池组件上形成电极颗粒并在骑自行车上生长的膜，并且是容量损失的来源（最终是细胞故障）。较长的持久，更轻，更紧凑的电化学能源需要为许多许多人提供动力情报界使用的设备。 锂离子电池代表了这样的电源。 为了改善这些电池，需要对电池故障机制的更多了解以及需要新的，更高容量电极的发展。 数学和物理科学局中打击恐怖主义计划的方法支持基础研究和劳动力发展中的新概念，有可能为国家安全做出贡献。