Thin Na-B" - Alumina Electrolytes by Electrochemical Vapor Deposition (EVD) for Sodium-Sulfur Batteries

薄 Na-B” - 用于钠硫电池的电化学气相沉积 (EVD) 氧化铝电解质

• 批准号: 9401896
• 负责人: Jan-Fong Jue
• 金额: $ 28.09万
• 依托单位: MATERIALS & SYSTEMS RESEARCH INC
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-10-01 至 1996-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9401896&HistoricalAwards=false
• 关键词: Thin; Na; Alumina; Electrolytes; Electrochemical

This Phase-II research examines sodium-sulfur battery, a leading candiadate for application in electric vehicles. A critical component in sodium-sulfur battery is the electrolyte, Na-B-alumina. In the state-of-the-art sodium-sulfur batteries, electrolyte thickness is approximately 1.5 mm which contributes nearly 40% to cell specific resistance. Two approaches are proposed to favricate thin (20 to 100 um) Na-B-alumina membranes which can reduce electrolyte resistance by a factor of - 30. This should substantially increase power density and energy efficiency. The two techniques proposed are: 1.) electrochemical vapor deposition (EVD), and 2.) fabricate thin membranes of Na-B-alumina by direct conversion of a-aluminia ; 3.) measure conduction properties of thin membranes; 4.) explore the current carrying capacity of Na-B-alumina membranes in electrochemical tests by sodium-sodium tests; 5.)explore the mechanism and the kinetics of the EVD and direct conversion processes, and 6.) supply thin electrolytes to a battery developer for evaluation in sodium-sulfur cells.

这项二期研究研究了钠硫电池，这是电动汽车应用的主要候选材料。 钠硫电池的关键成分是电解质 Na-B-氧化铝。 在最先进的钠硫电池中，电解质厚度约为 1.5 毫米，对电池比电阻的贡献率接近 40%。 提出了两种方法来制造薄（20 至 100 微米）Na-B-氧化铝膜，该膜可以将电解质电阻降低 - 30 倍。这将大大提高功率密度和能源效率。 提出的两种技术是：1.) 电化学气相沉积 (EVD)，以及 2.) 通过 a-氧化铝直接转化制备 Na-B-氧化铝薄膜； 3.) 测量薄膜的传导特性； 4.)通过钠-钠测试探索Na-B-氧化铝膜在电化学测试中的载流能力； 5.) 探索 EVD 和直接转换过程的机制和动力学，以及 6.) 向电池开发商提供稀薄电解质以用于钠硫电池的评估。