SBIR Phase I: HIGH CAPACITY ENERGY STORAGE ANODE MATERIAL

小型企业创新研究(SBIR)项目更广泛的影响/商业潜力是下一代储能设备的开发和广泛应用。采用高能量密度的先进材料，这些设备每一次充电可以储存显著更高的电能。特别是，具有明显更高能量密度的充电电池将得到改善；电动汽车一次充电的续航里程、防御平台(如无人机、海军舰艇、外骨骼、通信设备等)的工作时间、可再生能源的储存量、医疗设备的电池寿命以及对消费电子产品充电的需要减少。除了提高性能外，高能量密度设备还将加快新车辆或使用它们的设备的商业化、改装和销售。反过来，不仅增加了先进材料和电池生产商的投资和收入，也增加了在美国境内制造和销售电动汽车和设备的公司的投资和收入。该SBIR第一期项目计划利用现成的材料资源，开发利用化学气相沉积技术生产新型的纯石墨烯阳极材料。目前，石墨阳极基锂离子电池因其稳定性高、成本低、安全可靠等优点，成为便携式电子、电动汽车和电网储能领域最常用、最可靠的储能设备。然而，石墨的低容量(理论上为372mAh/g)阻碍了更高能量密度电池的发展。问题是，石墨的内部结构限制了锂在层间空间内的扩散。我们建议用石墨代替石墨作为阳极材料。我们的材料是一种新发现的高质量石墨烯网络，由以三维(3D)形式组装的无公度堆积的多层石墨烯(IMLG)组成。它表现出独特的结构和电学性质，使大量锂能够可逆地嵌入多层石墨烯的层间空间。作为LiB电池的负极材料，IMLG负极表现出极高的可逆容量，最高可达1500 mAh/g。在该项目的范围内，我们计划在保持高质量的同时扩大这种材料的生产规模，并向行业合作伙伴提供IMLG用于商业电池的集成测试。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

The broader impact/commercial potential of this Small Business Innovation Research (SBIR) project is the development and widespread adaptation of next generation energy storage devices. With high energy density advanced materials, these devices can store significantly higher electric power per single charge. Particularly, rechargeable batteries with significantly higher energy density will improve; the range of electric vehicles on a single charge, operating time of defense platforms (such as aerial drones, naval vessels, exoskeletons, communication devices, etc.), amount of renewable energy stored, battery life of medical devices, and the need to charge consumer electronics less often. In addition to improved performance, high energy density devices will accelerate commercialization, adaptation, and sale of new vehicles or devices that utilize them. In turn increasing investments and revenue not only for the advanced material and battery producers, but for companies involved in manufacturing and sale of electric vehicles and devices within the United Sates. This SBIR Phase I project proposes to develop the production of novel, pure graphene anode material by Chemical Vapor Deposition technique using readily available material resources. Currently, graphite anode-based LIBs are the most commonly used and the most reliable energy storage devices for portable electronics, electric vehicles and electric grid storage due to their stability, low cost, and safety. However, graphite's low capacity (theoretically, 372 mAh/g) prohibits the development of higher energy density batteries. The problem is that graphite's internal structure limits lithium diffusion within interlayer spaces. We propose to replace graphite as the anode material. Our material is a newly-discovered high-quality graphene network, consisting of incommensurately-stacked multilayer graphene (IMLG) assembled in three-dimensional (3D) form. It exhibits unique structural and electrical properties that enable the reversible intercalation of large amounts of lithium within interlayer spaces of multilayer graphene. IMLG anode exhibits an extremely high reversible capacity of up to 1500 mAh/g tested as an anode material in LIB cells. Within the scope of this project we plan to scale the production of this material, while maintaining high quality, and supply IMLG to industry partners for integration testing in commercial batteries.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.