PFI-TT: Rechargeable Batteries with Ultrafast Charging Capability and Long Usage Time per Charge

PFI-TT：具有超快充电能力和每次充电使用时间长的充电电池

基本信息

批准号：
1918991
负责人：
Leon Shaw
金额：
$ 25万
依托单位：
Illinois Institute of Technology
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2019
资助国家：
美国
起止时间：
2019-07-01 至 2024-09-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1918991&HistoricalAwards=false
关键词：
PFI TT Rechargeable Batteries Ultrafast

项目摘要

The broader impact/commercial potential of this Partnerships for Innovation-Technology Translation (PFI-TT) project is to develop silicon-based rechargeable batteries that can charge fast and can maintain a charge longer. Such batteries will allow cell phones to be charged to their full capacity in 20 minutes, compared with current standards of 2 hours; and will extend usage time to 3 days, rather than 2, prior to needing recharging. The ultrafast charging batteries and high energy batteries would impact other important products, ranging from cameras and laptops to drones, power tools, electric forklifts, military devices, and others. Silicon-based high-energy batteries could reduce the cost and weight of the battery pack by 60% in electric vehicles. The scientific understanding derived from this project would enable translation of silicon-based battery technology into consumer electronics applications in the near term and electric vehicle applications in the longer term. The proposed project employs a novel, simple and low cost manufacturing method that can synthesize a new type of Si-based anode powder that exhibits unusual properties with ultrafast charging capability, high specific capacity and long cycle life simultaneously. The objective of this research is to overcome technical challenges in translating this new half-cell technology into full cell rechargeable batteries with unprecedented ultrafast charging capability, high specific energy and long cycle life. Six research tasks will be performed to address the challenges of low Coulombic efficiency and irreversible Li loss in the first formation cycle of full cells, cathode material design, correct matching of anode and cathode capacities for high specific energy, proper selection of cutoff voltages of full cells to minimize capacity decay during cycles, and design of full cells capable of ultrafast charging without Li plating. Three-electrode pouch cell investigation and post-mortem analysis of full cells with different active material loadings per unit area and charge/discharge rates after different cycles will be conducted to develop fundamental understanding and provide guidance to address the aforementioned challenges and achieve the research objective.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

该创新技术翻译合作伙伴关系 (PFI-TT) 项目更广泛的影响/商业潜力是开发硅基可充电电池，该电池可以快速充电并且可以保持更长时间的充电。这种电池可以让手机在20分钟内充满电，而目前的标准是2小时；并且在需要充电之前将使用时间延长至 3 天，而不是 2 天。超快充电电池和高能电池将影响其他重要产品，从相机、笔记本电脑到无人机、电动工具、电动叉车、军事设备等。硅基高能电池可以将电动汽车电池组的成本和重量降低60%。从该项目中获得的科学认识将使硅基电池技术能够在短期内转化为消费电子应用，并在长期内转化为电动汽车应用。该项目采用一种新颖、简单、低成本的制造方法，可以合成一种新型硅基负极粉末，该粉末具有超快充电能力、高比容量和长循环寿命的独特性能。这项研究的目的是克服技术挑战，将这种新的半电池技术转化为具有前所未有的超快充电能力、高比能量和长循环寿命的全电池可充电电池。将开展六项研究任务，以解决全电池首次化成循环中库仑效率低和不可逆锂损失、正极材料设计、高比能量正负极容量的正确匹配、全电池截止电压的正确选择等挑战。电池，以最大限度地减少循环过程中的容量衰减，并设计能够在不镀锂的情况下超快速充电的全电池。将进行三电极软包电池研究以及对单位面积不同活性材料负载量和不同循环后的充电/放电速率的全电池进行事后分析，以形成基本理解并为解决上述挑战和实现研究目标提供指导该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。