SBIR Phase I: Engineered Solid Electrolyte Interphase Films for Silicon-Based Lithium Insertion Anodes

SBIR 第一阶段：用于硅基锂插入阳极的工程固体电解质中间膜

• 批准号: 1113240
• 负责人: Wanli Xu
• 金额: $ 14.9万
• 依托单位: ELECTROCHEMICAL MATERIALS, LLC
• 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: 2011-07-01 至 2012-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1113240&HistoricalAwards=false
• 关键词: SBIR; Phase; Engineered; Solid; Electrolyte

This Small Business Innovation Research Phase I project proposes to develop and commercialize new types of silicon nanowire anodes which may be used to safely store large amounts of lithium for many types of lithium batteries. The key innovation involves unique functionalization and integration methods that enable nanowire anodes to be cycled reversibly for thousands of cycles without mechanical failure, agglomeration, or deleterious side reactions. Silicon nanowires will be fabricated via electroless etching, and chemically or electrochemically functionalized to improve their performance and capacity retention in a lithium-ion battery. The objective of this work is to develop novel silicon composite anodes that may undergo over 200 deep cycles with capacities of at least 1000 mA.hg-1.The broader impact/commercial potential of this project is to develop high capacity anode rechargeable lithium batteries with capacities of over 1000 mA.hg-1, which represents approximate doubling of cell capacity without a significant change in manufacturing or cost. There is a critical need for high energy density rechargeable batteries for next generation hybrid vehicles and fully electric vehicles. In a recent report, the U.S. Department of Energy pointed out that the primary obstacles to the widespread introduction of lithium-based batteries for electric vehicles are the relatively low specific energy and the relatively high cost per kWh. The proposed integration and surface engineering methods will address these problems allowing the safe storage of lithium in silicon anodes for current and future generations of lithium batteries.

该小型企业创新研究第一阶段项目建议开发新型硅纳米线阳极并将其商业化，该阳极可用于安全地存储多种类型锂电池的大量锂。关键的创新涉及独特的功能化和集成方法，使纳米线阳极能够可逆地循环数千次，而不会出现机械故障、结块或有害的副反应。硅纳米线将通过化学蚀刻制造，并进行化学或电化学功能化，以提高其在锂离子电池中的性能和容量保持率。这项工作的目标是开发新型硅复合阳极，可进行 200 多次深循环，容量至少为 1000 mA.hg-1。该项目更广泛的影响/商业潜力是开发容量超过 1000 mA.hg-1 的高容量阳极可充电锂电池，这意味着电池容量大约翻倍，而制造或成本没有重大变化。下一代混合动力汽车和全电动汽车迫切需要高能量密度可充电电池。美国能源部在最近的一份报告中指出，电动汽车广泛采用锂基电池的主要障碍是相对较低的比能量和相对较高的每千瓦时成本。所提出的集成和表面工程方法将解决这些问题，从而能够在当前和未来几代锂电池的硅阳极中安全存储锂。