SBIR Phase I: HIGH CAPACITY ENERGY STORAGE ANODE MATERIAL

这个小型企业创新研究（SBIR）项目的更广泛的影响/商业潜力是下一代储能设备的开发和广泛适应。使用高能量密度的先进材料，这些设备每次充电可以存储更高的电力。特别是具有更高能量密度的可充电电池将得到改善；电动汽车一次充电的续航里程、国防平台（如无人机、海军舰艇、外骨骼、通信设备等）的运行时间、可再生能源存储的数量、医疗设备的电池寿命，以及消费电子产品减少充电次数的需求。除了提高性能外，高能量密度设备还将加速商业化、适应和使用它们的新车或设备的销售。反过来，这不仅增加了先进材料和电池生产商的投资和收入，也增加了美国境内从事电动汽车和设备制造和销售的公司的投资和收入。该SBIR一期项目旨在利用现有的材料资源，通过化学气相沉积技术开发新型、纯石墨烯阳极材料。目前，基于石墨阳极的锂离子电池由于其稳定性、低成本和安全性，是便携式电子产品、电动汽车和电网存储中最常用和最可靠的储能设备。然而，石墨的低容量（理论上为372毫安时/克）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的扩散。我们建议用石墨代替阳极材料。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）形式组装的不规则堆叠多层石墨烯（IMLG）组成。它具有独特的结构和电学性能，可以在多层石墨烯的层间空间内可逆地插入大量锂。作为锂离子电池的负极材料，IMLG阳极显示出极高的可逆容量，高达1500 mAh/g。在这个项目范围内，我们计划扩大这种材料的生产规模，同时保持高质量，并向行业合作伙伴提供IMLG，用于商用电池的集成测试。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值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.