Interface engineering and mechanism understanding for Na metal anode

Na金属阳极的界面工程和机理理解

• 批准号: 572231-2022
• 负责人: Zhao, YangY
• 金额: $ 1.82万
• 依托单位: University of Western Ontario
• 依托单位国家: 加拿大
• 项目类别: Alliance Grants
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=759833
• 关键词: Interface; engineering; mechanism; understanding; Na

The United Nation's 2015 Paris Agreement provides a framework to mitigate greenhouse gas emissions, and thereby limit the increase in global average temperature to 2 °C above pre-industrial levels. The Canadian government will ban the sales of fuel-burning vehicles and light-duty trucks starting 2035 to reach net-zero emissions across the country by 2050. In addition, the sales of electric vehicles will weigh 30% of the automobile market by 2025, the market size for battery packs will grow to over $100B. Canada, as the tenth-largest auto manufacturer and the tenth-largest market of EVs sales, has been a major player in this market. Li-ion batteries (LIBs) are one of the most popular energy storage systems for portable electronics and electrical vehicles (EVs). Unfortunately, Li is not regarded as an abundant element in the Earth's crust and the costs of Li compounds have also rapidly increased in the past years, resulting in increased prices for LIBs. Due to the high abundance, low cost, and suitable redox potential of sodium (Na), The Na metal anode is the most desirable anode for the Na metal batteries due to its high theoretical capacity, low electrochemical potential and lightweight. However, the major challenges for the Na metal anode are the Na dendrite growth and the unstable interface between electrolytes and the Na anode. Surface and interface engineering are the keys to achieving reduced Na dendrite growth and enhanced electrochemical performances. To have a full understanding of the mechanisms involved, we will collaborate with Dr. Chen's group at the University of Michigan-Dearborn to develop a closed-loop research plan to understand the electrochemical-chemical-mechanical stability of the interfaces for Na metal anode combing the experimental design and theoretical simulations. Successful completion of the project will provide significant benefits to Canada's scientific, industrial and social development by transferring new knowledge, expertise and technologies.

联合国2015年《巴黎协定》提供了减少温室气体排放的框架，并将全球平均气温升高限制在比工业化前水平高2°C的范围内。加拿大政府将禁止销售燃油汽车和轻型汽车。从2035年开始，到2050年全国卡车将实现净零排放。此外，到2025年，电动汽车销量将占汽车市场的30%，市场规模加拿大作为第十大汽车制造商和第十大电动汽车销售市场，一直是该市场的主要参与者之一。不幸的是，锂并不被认为是地壳中丰富的元素，而且锂化合物的成本在过去几年也迅速增加，导致锂离子电池的价格上涨。到期的由于钠（Na）的高丰度、低成本和合适的氧化还原电位，钠金属负极因其高理论容量、低电化学电位和轻质而成为钠金属电池最理想的负极。对于钠金属阳极来说，钠枝晶的生长以及电解质与钠阳极之间的不稳定界面是实现减少钠枝晶生长和增强电化学性能的关键。将与博士合作密歇根大学迪尔伯恩分校的陈教授团队开发了一项闭环研究计划，结合实验设计和理论模拟来了解钠金属阳极界面的电化学-化学-机械稳定性，该项目的成功完成将带来显着的效益。通过转让新知识、专业技术和技术来促进加拿大的科学、工业和社会发展。