Exploring Polymer Electrolytes for use in Li-ion Batteries

探索用于锂离子电池的聚合物电解质

• 批准号: 2356031
• 金额: --
• 依托单位: Durham University
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2020
• 资助国家: 英国
• 起止时间: 2020 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2356031
• 关键词: Exploring; Polymer; Electrolytes; use; Li

Rechargeable Li-ion batteries conventionally operate via the movement of Li ions between electrodes, through a microporous separator film and in the presence of an organic solvent. Whilst the global market for Li-ion batteries is predicted to increase from the electrification of vehicles and increasing consumer demand for electrical performances, several serious performance and safety concerns currently exist that must be addressed. When compared to conventional Li-ion batteries, all-solid-state equivalents permit greater design flexibility, exhibit greater potential energy densities and avoid the usage of flammable cell materials. However, larger resistance values are typically observed at ambient temperatures, which limits their widespread application. Semi-crystalline, semi-aromatic polyesters based on poly(ethylene terephthalate) (PET) may offer a competitive advantage over incumbent materials in solid-state batteries. Working closely with DuPont Teijin Films (DTF), this CDT studentship aims to investigate the design, synthesis and characterisation of novel polyester-based materials for application as solid polymer electrolytes in Li-ion batteries. Once successfully prepared, the electrolytes will be analysed via impedance spectroscopy to determine their functionality and performance. The best performing electrolytes will then be tested in complete all-solid-state cells to determine the feasibility of using such polymer electrolytes in commercial solid-state cells. This project will involve some elements of synthetic polymer chemistry, in addition to the physical characterisation of the polymers prepared.

可再充电Li离子电池通常经由Li离子在电极之间移动、通过微孔隔膜并且在有机溶剂的存在下操作。虽然锂离子电池的全球市场预计将随着汽车电气化和消费者对电气性能需求的增加而增长，但目前存在一些必须解决的严重性能和安全问题。与传统的锂离子电池相比，全固态电池具有更大的设计灵活性，具有更高的势能密度，并避免使用易燃电池材料。然而，通常在环境温度下观察到较大的电阻值，这限制了它们的广泛应用。基于聚（对苯二甲酸乙二醇酯）（PET）的半结晶、半芳香族聚酯可以提供优于固态电池中的现有材料的竞争优势。与杜邦帝人薄膜（DTF）密切合作，该CDT学生奖学金旨在研究新型聚酯基材料的设计，合成和表征，用于锂离子电池中的固体聚合物电解质。一旦成功制备，将通过阻抗谱分析电解质，以确定其功能和性能。然后将在完整的全固态电池中测试性能最好的电解质，以确定在商业固态电池中使用这种聚合物电解质的可行性。该项目将涉及合成聚合物化学的一些元素，除了制备的聚合物的物理特性。