Collaborative Research: Manufacturing Mechanically Compliant Silicon Nanostructures for Rechargeable Lithium Ion Batteries

合作研究：制造用于可充电锂离子电池的机械兼容硅纳米结构

• 批准号: 1067947
• 负责人: Hanqing Jiang
• 金额: $ 23.22万
• 依托单位: Arizona State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-09-01 至 2015-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1067947&HistoricalAwards=false
• 关键词: Collaborative; Research; Manufacturing; Mechanically; Compliant

This research project aims at investigating and demonstrating a new concept of manufacturing silicon (Si) anode lithium (Li) ion batteries by utilizing Si nanostructures on elastomeric substrates as anodes to release the stress induced by Li ion diffusion during charge-discharge cycles. Si anodes hold great promise and are being closely investigated for use in Li-ion batteries because they have the highest-known theoretical charge capacity. However, the development of Si-anode Li-ion batteries has lagged behind because of their large physical volume change (4X) during use, specifically during the insertion and extraction of Li ions, which results in pulverization and early capacity fading thus severely limiting their useful life. The objective of this collaborative project is to resolve the stress issue and manufacture Si-anode Li-ion batteries through a fundamental investigation of a novel concept of mechanical-electrochemical coupling of Si nanostructures on elastomeric substrates during insertion and de-insertion of Li ions. Specific studies will focus on (1) a theoretical understanding of releasing diffusion-induced stress using elastomeric substrates; (2) manufacturing of various Si nanostructures on elastomeric substrates as anodes in Li-ion batteries, (3) electrochemical characterization of Li-ion batteries with the nanostructured Si on elastomeric substrates as anode; and (4) development of a cost-effective approach and the realization of manufacturability. If successful, the results of this collaborative research will facilitate the fundamental understanding in the coupled mechanical-electrochemical properties of Si nanostructures on elastomeric substrates and provide a powerful means to realize theoretically maximum energy density of Si-anode Li-ion batteries. Integrated, interactive and collaborative research and educational programs in two research institutions (University of Delaware and Arizona State University) will be established. The graduate and undergraduate students involved in the proposed research will be trained through a multidisciplinary and multi-university environment. The research achievement will be used to develop and enhance both undergraduate and graduate courses. An innovative outreach activity toward the general public will be established through the collaboration with the Arizona Science Center.

本研究项目旨在研究和展示一种制造硅（Si）阳极锂（Li）离子电池的新概念，即利用弹性体基底上的Si纳米结构作为阳极，以释放充电-放电循环期间Li离子扩散引起的应力。硅阳极具有很大的前景，并且正在密切研究用于锂离子电池，因为它们具有最高的已知理论充电容量。然而，Si阳极Li离子电池的发展已经落后，因为它们在使用期间，特别是在Li离子的插入和提取期间的大的物理体积变化（4X），这导致粉化和早期容量衰减，从而严重限制了它们的使用寿命。该合作项目的目标是解决应力问题，并通过对锂离子插入和脱嵌过程中弹性体基底上硅纳米结构的机械-电化学耦合的新概念进行基础研究来制造硅阳极锂离子电池。具体研究将集中在（1）使用弹性体基底释放扩散诱导应力的理论理解;（2）在弹性体基底上制造各种Si纳米结构作为锂离子电池的阳极，（3）用弹性体基底上的纳米结构Si作为阳极的锂离子电池的电化学表征;以及（4）开发具有成本效益的方法和实现可制造性。如果成功的话，这项合作研究的结果将促进对弹性体基底上Si纳米结构的耦合机械-电化学性质的基本理解，并为实现Si阳极锂离子电池理论上的最大能量密度提供强有力的手段。将在两个研究机构（特拉华州大学和亚利桑那州州立大学）建立综合、互动和协作的研究和教育项目。参与拟议研究的研究生和本科生将通过多学科和多大学环境进行培训。研究成果将用于开发和加强本科和研究生课程。通过与亚利桑那科学中心的合作，将建立一个面向公众的创新外联活动。