Smart graphene-based composites for high-energy and self-healing lithium-ion batteries

用于高能自愈锂离子电池的智能石墨烯基复合材料

• 批准号: 493817-2016
• 负责人: Chen, Zhongwei
• 金额: $ 11.83万
• 依托单位: University of Waterloo
• 依托单位国家: 加拿大
• 项目类别: Strategic Projects - Group
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=642013
• 关键词: Smart; graphene; based; composites; energy

Lithium based rechargeable battery technologies have become the focal point of research to fulfill the requirements of electric vehicles (EVs). The most commonly used LIBs utilize graphite and transition metal oxides as anode and cathode materials, respectively. Such a battery can only provide an energy density of ~150 Wh kg-1 due to the low specific capacities of the electrode materials. To meet the requirements of both high energy and power density with cycle durability of modern EVs, the next generation of active material is necessary. The proposed project will specifically address critical technical barriers to the improved performance including energy density, cycling stability and safety as well as power density of lithium ion batteries, while strategically lowering the cost of commercial production by designing and developing smart graphene-based nanostructured composites for automotive applications. The novel graphene-based composite materials can overcome the existing challenges of energy density, cycling life, and safety as well as cost of current lithium-ion batteries. This work entails a unique approach in the development of highly porous graphene materials based Si nanoparticles to create a unique 3D architecture. Another approach is development of practical battery from self-healing functionalized smart electrode fabrication for safe operation of LIBs. From the development of proposed research, it is expected that utilizing high quality modified graphene and silicon/graphene composite nanomaterials will efficiently overcome the current challenges of commercial electrodes, which will play the key role in improving the energy density, cycling stability, safety and power performance of LIBs. It can be predicted that the success of the proposed high-performance LIBs will reduce both toxic and greenhouse gas emissions by improving energy efficiency and integrating with transportation and green energy systems including solar and wind energy, and this will provide significant social and environmental benefits to all Canadians. The expertise developed and the training of HQP in this research project will contribute to expanding industrial and business activities and enterprises in Canada and maintain Canada's lead in LIBs technology as well as the emerging graphene production market.

基于锂的可充电电池技术已经成为研究的焦点以满足电动车辆（EV）的要求。最常用的LIB分别利用石墨和过渡金属氧化物作为阳极和阴极材料。由于电极材料的低比容量，这种电池只能提供约150 Wh kg-1的能量密度。为了满足现代电动汽车的高能量和高功率密度以及循环耐久性的要求，下一代活性材料是必要的。拟议项目将专门解决提高性能的关键技术障碍，包括锂离子电池的能量密度、循环稳定性和安全性以及功率密度，同时通过设计和开发用于汽车应用的智能石墨烯基纳米结构复合材料，战略性地降低商业生产成本。新型石墨烯基复合材料可以克服现有锂离子电池的能量密度、循环寿命、安全性以及成本等挑战。这项工作需要一种独特的方法来开发基于Si纳米颗粒的高度多孔石墨烯材料，以创建独特的3D架构。另一种方法是从自修复功能化智能电极制造中开发实用电池，用于LIB的安全操作。从拟议研究的发展来看，预计利用高质量的改性石墨烯和硅/石墨烯复合纳米材料将有效地克服目前商业电极的挑战，这将在提高LIB的能量密度，循环稳定性，安全性和功率性能方面发挥关键作用。可以预见，拟议的高性能LIB的成功将通过提高能源效率并与运输和包括太阳能和风能在内的绿色能源系统相结合来减少有毒气体和温室气体的排放，这将为所有加拿大人提供重大的社会和环境效益。HQP在该研究项目中开发的专业知识和培训将有助于扩大加拿大的工业和商业活动以及企业，并保持加拿大在LIB技术和新兴石墨烯生产市场的领先地位。