EAGER: An Innovative High Specific Energy Li-air battery

CBET-134187PI：由于金属锂的高比能量(12kWh kg-1)和环境中可获得的无限氧气，法格里锂空气电池是目前锂离子电池的很有前途的替代品。然而，即使实际获得的比能量远低于理论值(不到理论值的10%)，实验室研究获得的锂空气电池的比能量至少是锂离子电池的2-5倍。因此，发展科学和技术以实现更接近可实现的最大价值是一个重要目标。锂空气电池比能量的低值部分与多孔正极的低传质系数有关。在拟议的努力中，提出了一种创新的、有活性的锂空气电池，具有更高的比能量和功率。创新之处在于开发了一种靠近阴极的交叉指状微通道系统，电解液和氧气混合物通过该系统循环。假设锂空气电池的比能量和功率提高是因为电解液在多孔电极中的对流可以增加电极中氧气和锂离子的质量流量。此外，还提出了一种改进的热管理系统，使电池系统能够在极端环境条件下运行，电解液在电池电极内外循环。新提议的电池预计比能量高达600Wh kg-1，比功率高达25W kg-1。因此，该项目将导致锂空气电池具有更高的比能量和功率。应用领域包括汽车、储能、航空航天等。

CBET-134187PI: FaghriLi-air batteries are promising alternatives to current Li-ion batteries due to the high specific energy of lithium metal (12 kWh kg-1) and the infinite oxygen for the cathode available from the ambient. However, even if the specific energy achieved in practice is much lower than the theoretical value (less than 10% of its theoretical value), the specific energy of Li-air batteries achieved in laboratory studies is at least 2-5 times higher than that of Li-ion batteries. Thus, developing the science and the technology to achieve values closer to the maximum achievable is an important objective. The low values achieved for the specific energy of a Li-air battery is partly related to the low mass transfer coefficient of the porous cathode electrode. In the proposed effort, an innovative and active Li-air battery is proposed that has a much higher specific energy and power. The innovation lies in the development of an inter-digitated micro channel system adjacent to the cathode through which electrolyte and oxygen mixture is circulated. The hypothesis is that the specific energy and power of Li-air batteries is enhanced because the convection of electrolyte in the porous electrode can increase the mass flux of oxygen and lithium ion in the electrode. In addition, an improved thermal management system with the circulation of electrolyte, within and outside the battery electrode is proposed enabling the battery system to operate under extreme environmental conditions The newly proposed battery is expected to have a specific energy as high as 600 Wh kg-1, and a specific power as high as 25 W kg-1. Thus, the project will lead to Li-air batteries with enhanced specific energy and power. The application domains include automotive, energy-storage, aerospace and others.