SBIR Phase I: Advanced Metal Anode with Artificial Solid Electrolyte Interphase (SEI) for Rechargeable Lithium Metal Batteries

该小型企业创新研究（SBIR）项目的更广泛影响/商业潜力是开发用于可充电锂金属电池的先进金属阳极（AMA）材料，重点是满足消费电子产品，电动汽车，电动飞机和可再生能源存储应用的高能量密度，低成本储能系统的需求。该项目专为不断增长的全球锂电池市场而设计，开发AMA材料作为10美元B阳极市场的替代品。 这些电池将使电动汽车和可再生能源得到更广泛的采用。 该SBIR第一阶段项目提出利用人工生成的固体电解质中间相（SEI）制备阳极材料。使用锂金属作为阳极可以使当前锂电池的能量密度加倍;然而，现有技术的锂金属薄膜阳极具有在反复循环的情况下在界面附近形成树枝状结构的趋势，从而导致性能和安全问题。基于新的SEI模型，所提出的铜基阳极材料将具有引导锂沉积远离具有其设计的孔结构的界面的SEI。第一阶段的研究工作将集中在：1）制备具有完美覆盖的SEI的AMA材料; 2）通过硬币半电池和全电池循环测试证明AMA材料的锂电镀和脱镀能力。结合适当的电解质和电极，基于AMA的硬币半电池将在1 mA/cm 2和1 mAh/cm 2下完成300次循环;基于AMA的硬币全电池将在不低于0.2C的速率下进行100次循环，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进行评估，更广泛的影响审查标准。

The broader impact/commercial potential of this Small Business Innovation Research (SBIR) project is to develop an advanced metal anode (AMA) material for rechargeable lithium metal battery focused on meeting the needs of a high energy density, low-cost energy storage system for applications in consumer electronics, electric vehicles, electric planes and renewable energy storage. The project is designed for the growing global lithium battery market, developing the AMA material as a drop-in replacement for the $10 B anode market. These batteries would enable broader adoption of electric vehicles and renewable energy sources. This SBIR Phase I project proposes to prepare an anode material utilizing an artificially generated solid electrolyte interphase (SEI). Use of lithium metal as the anode can double the energy density of current lithium batteries; however, state-of-the-art lithium metal thin film anodes have the tendency to form dendritic structures near the interface with repeated cycling, causing performance and safety issues. Based on a new SEI model, the proposed copper-based anode material will have an SEI guiding the deposition of lithium away from the interface with its designed pore structure. Phase I research efforts will focus on: 1) preparing the AMA material with perfectly covered SEI; 2) demonstrating lithium plating and de-plating capabilities of the AMA material with coin half-cell and full-cell cycling tests. In conjunction with appropriate electrolytes and electrodes, the AMA-based coin half-cells will finish 300 cycles at 1 mA/cm2 and 1 mAh/cm2; and the AMA-based coin full-cells will have 100 cycles at no less than 0.2 C rate with 80% capacity retention.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.