High power battery electrodes

提高电能存储系统的性能将在维持当前发达国家的生活质量以及发展中国家的可持续增长中发挥关键作用。例如，在交通运输领域，必须开发新技术，因为依赖化石燃料燃烧的能源消费和生产已经对世界经济和生态产生了严重影响。电动汽车（ev）和插电式混合动力汽车（phev）的发展需要性能更高的电力存储系统，这将有助于减少交通运输部门对环境的影响。锂离子电池是一种高能量存储设备，但在功率方面仍然非常有限，这阻碍了它们在运输车辆中的集成。在这个合作研究项目中，我们将研究和开发使用新型高性能粘合剂的锂离子电池电极，以满足电动汽车应用的高功率（1kw /kg）和长期可循环性要求（>= 30000次循环）。该项目的创新和关键方面在于使用了由工业合作伙伴专门为高功率锂离子电池设计的弹性体粘合剂，这将使电极的无溶剂制造成为可能。我们将从机械稳定性和充电效率方面对配方进行优化。将测量活性物质的密度、孔隙率和电极的厚度，并评估它们的效果。然后，将使用电子（SEM， TEM）和原位扫描探针显微镜和电化学技术对溶剂和无溶剂方法获得的电极和细胞的老化过程进行深入研究。在这个项目的最后一年，我们将用挤压电极制造一个10sofwh的堆叠系统，并研究这种堆叠系统的稳定性和产热。高功率电池的成功开发将刺激清洁“汽车”相关产业的经济，有助于确保我们的环境质量，并有助于加拿大对更清洁环境的承诺。

The development of electrical energy storage systems with improved performance will play a critical role inmaintaining the current quality of life in developed countries as well as in the sustainable growth of developingcountries. In the transportation sector, for instance, new technologies must be developed because energyconsumption and production that rely on the combustion of fossil fuels already have a severe impact on worldeconomics and ecology. The development of electric vehicles (EVs) and plug-in hybrid electric vehicles(PHEVs), which calls for more performing electric energy storage systems, would help to reduce theenvironmental impact of the transportation sector. Lithium-ion batteries are highly energetic storage devicesbut remain however very limited in terms of power, which hinders their integration in transportation vehicles.In this collaborative research project, we will study and develop lithium-ion battery electrodes that use novel,high performance binders to meet high power (1 kW/kg) and long-term cyclability requirements for applicationin EVs (>= 30000 cycles). The innovative and key aspect of the project lies in the use of elastomeric bindersthat were specifically designed by the industrial partner for the purpose of high power Lithium-ion batteries andthat will enable electrode fabrication by solvent-free processes. We will begin by optimizing the formulationwith regards to the mechanical stability and charging efficiency. The density of active material, porosity andthickness of the electrodes will be measured and their effect evaluated. Then, a thorough study of the agingprocesses of electrodes and cells obtained by solvent and solvent-free approaches will be undertaken usingelectronic (SEM, TEM) and in-situ scanning probe microscopies and electrochemical techniques. We will,during the last year of this project, fabricate a stacked system from extruded electrodes which will present 10sof Wh and study the stability and heat generation in such stacked system. The successful development of highpower batteries will stimulate the economy of clean "cars" related industries, helping to assure the quality ofour environment and contribute to the commitment of Canada to a cleaner environment.