Design and discovery of new non-oxide based materials

新型非氧化物基材料的设计和发现

• 批准号: 2094410
• 金额: --
• 依托单位: University of Liverpool
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2018
• 资助国家: 英国
• 起止时间: 2018 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2094410
• 关键词: Design; discovery; new; non; oxide

Compared to oxide materials, less effort has been expended on the development of polar non-oxide compounds of the metallic elements. This project will develop new classes of non-oxide extended solid, through synthesis of new compositions and detailed structural and property characterisation. These materials will be evaluated for properties of interest for a range of applications, for example as electrolytes in solid-state batteries, which is taken as the example in what follows.The superior performance of Lithium-ion batteries due to factors such as high energy density, large electrochemical stability window and long lifetime make them the current technology of choice for portable, rechargeable devices. It would be desirable to address current safety issues that may limit the use of Lithium-ion batteries for large-scale technologies such as electric vehicles. Organic solvents are used as part of the electrolyte in current Li-ion systems. The flammable nature of these compounds mean Li-ion batteries can pose a severe safety risk if they are operated outside of their limited temperature range. Furthermore, dendritic growth through the electrolyte can lead to short circuiting of the battery system meaning (irrespective of it having an extremely high theoretical charge capacity) Li cannot currently be used as an anode material limiting the overall capacity that Lithium-ion batteries can have with current anode materials. A possible solution to these issue comes in the form of solid state electrolytes and thus all-solid-state batteries (ASSBs) that act as a separator and an electrolyte, have higher safety and a high energy density when compared to their liquid electrolyte counterparts. Using new syntheses and a range of characterisation techniques (including multiple source diffraction, impedance, solid state NMR and electrochemical stability characterisation) we will investigate new solid state electrolyte materials for use in ASSBs, exploring for example chalcogenide-based materials.

与氧化物材料相比，在金属元素的极性非氧化物化合物的开发上花费的努力较少。该项目将通过合成新的组合物和详细的结构和性能表征，开发新类别的非氧化物扩展固体。这些材料将被评估为一系列应用的感兴趣的特性，例如作为固态电池中的电解质，这在下文中作为示例。锂离子电池由于高能量密度、大电化学稳定窗口和长寿命等因素而具有上级性能，使其成为便携式可充电设备的当前首选技术。希望解决可能限制锂离子电池用于大规模技术（例如电动车辆）的当前安全问题。有机溶剂被用作当前锂离子系统中的电解质的一部分。这些化合物的易燃性意味着锂离子电池如果在其有限的温度范围外运行，可能会造成严重的安全风险。此外，通过电解质的枝晶生长可导致电池系统的短路，这意味着（不管其具有极高的理论充电容量）Li目前不能用作阳极材料，限制了锂离子电池利用当前阳极材料可具有的总容量。这些问题的一种可能的解决方案是固态电解质的形式，因此充当隔板和电解质的全固态电池（ASSB）与其液体电解质对应物相比具有更高的安全性和高能量密度。使用新的合成和一系列表征技术（包括多源衍射，阻抗，固态NMR和电化学稳定性表征），我们将研究用于ASSB的新型固态电解质材料，例如探索硫属化物基材料。