Collaborative Research: Thermodynamics and Ion Transport in Block Copolymer/Lithium Salt Mixtures

合作研究：嵌段共聚物/锂盐混合物中的热力学和离子传输

• 批准号: 0966626
• 负责人: Nitash Balsara
• 金额: $ 32万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-06-01 至 2014-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0966626&HistoricalAwards=false
• 关键词: Collaborative; Research; Thermodynamics; Ion; Transport

TECHNICAL SUMMARY:A fundamental study of the interplay between ordered morphology, grain structure, and ionic conductivity in mixtures of block copolymers and lithium salts is proposed. The results of the work have the potential to impact the development of high specific energy batteries with solid electrolytes. The work will focus on mixtures of polystyrene-polyethyleneoxide block copolymers, synthesized by anionic polymerization, and bis-trifluoromethylsulfonimide (LiTFSI), a salt that is often used in batteries containing polymer electrolytes. Small-angle X-ray scattering and depolarized light scattering will be used to determine the nature of the order-disorder and order-order phase transitions in these materials. Conductivity measurements will be made on the same samples as those used in the X-ray and light scattering studies using AC impedance spectroscopy. Measurements will be made over a wide range of block copolymer compositions, salt concentration, temperature, and annealing conditions. NON-TECHNICAL SUMMARY:The fundamental work proposed in this project is motivated by the need to design safe rechargeable batteries for clean energy-related applications such as electric vehicles and stationary energy storage. The proposed nanostructured ion-conducting solid will be used as the electrolyte in a lithium battery. By replacing the flammable liquid electrolyte that is used in current lithium batteries by a solid, one can use higher energy electrodes that, in turn increase the energy density of the battery. The absence of a flammable component makes the battery safe. The co-PIs will use solid-state batteries for demonstrations in their outreach activities involving high school students. Garetz works with the David Packard Center for Technology and Educational Alliances in New York City to mentor local high school students in fields related to technology and research. Balsara works with Math and Science Summer Academy program at Berkeley, and enrichment program which brings students from the Oakland School District to the University of California. The PIs will continue an ongoing collaboration with Professor M. Banaszak at A. Mickiewicz University, Poland on the subject of ion-containing polymers that arose from an NSF-sponsored workshop in Poland.

技术摘要：提出了对块共聚物和锂盐混合物中有序形态，晶粒结构和离子电导率之间相互作用的基本研究。 工作结果有可能影响使用固体电解质的高特异性电池的开发。 这项工作将集中于聚苯乙烯 - 多乙二烯氧化物氧化氧化氧化氧化物共聚物，由阴离子聚合合成，以及三氟甲基磺胺酰亚胺（LITFSI），这是一种通常用于包含聚合物电解质电池的盐。 小角度的X射线散射和去极化的光散射将用于确定这些材料中订单disorder和订购相变的性质。 电导率测量将与使用AC阻抗光谱法中X射线和光散射研究中使用的样品相同。 测量将在各种块共聚物组成，盐浓度，温度和退火条件下进行。 非技术摘要：该项目中提出的基本工作是出于设计可充电电池的必要性，以用于清洁能源相关的应用，例如电动汽车和固定能源存储。 所提出的纳米结构构建实体将用作锂电池中的电解质。 通过替换当前锂电池中使用的易燃液体电解质，可以使用更高的能量电极，进而增加电池的能量密度。 没有易燃组件可以使电池安全。 共同佩斯将在涉及高中生的外展活动中使用固态电池进行示范。 Garetz与纽约市的David Packard技术与教育联盟中心合作，指导与技术和研究有关的领域的当地高中生。 Balsara与伯克利的数学和科学夏季学院计划合作，并将其从奥克兰学区的学生带到加利福尼亚大学。 PI将继续与波兰A. Mickiewicz大学的M. Banaszak教授进行持续的合作，讨论来自波兰的NSF赞助的研讨会的含离子的聚合物。