SBIR Phase II: Ultra High Capacity and High Rate Anodes for Next Generation Lithium-Ion Batteries

该小型企业创新研究（SBIR）第二阶段项目旨在开发具有成本效益和商业化的负极材料，这些材料具有大锂存储容量，高倍率性能和下一代锂离子电池的长循环寿命。硅基负极材料在满足先进锂离子电池的高能量密度要求方面具有巨大的潜力。然而，硅的固有低电导率和嵌锂和脱锂过程中的巨大体积变化导致电极快速失效，从而阻碍了它们的实际应用。所提出的Si纳米复合材料预计将有效地防止Si颗粒的破碎，保持电子传导网络的完整性，并允许电解质溶液容易地进入活性位点。该第二阶段项目将开发和优化纳米复合材料组合物以及相关的合成和加工程序，以加速美国阳极材料的工业规模制造。该项目更广泛的影响/商业潜力是开发一种新的阳极技术，能够利用锂离子电池性能的显着改善，这将加速先进锂离子电池在插电式混合动力电动汽车和全电动汽车上的应用。

This Small Business Innovation Research (SBIR) Phase II project aims to develop cost-effective and commercializable anode materials exhibiting large lithium storage capacity, high rate capability, and long cycle life for next generation lithium-ion batteries. Silicon-based anode materials hold great potential to meet the high energy density requirements for advanced lithium ion batteries. However, the intrinsic low electrical conductivity and huge volume change of silicon during lithium insertion and extraction lead to quick electrode failure, and thus hindering their practical applications. The proposed Si nanocomposites are expected to effectively prevent the crumbling of Si particles, maintain the integrity of the electron-conducting network, and allow the electrolyte solution to easily access the active sites. This phase II project will develop and optimize the nanocomposite compositions and related synthesis and processing procedure to accelerate industrial scale manufacturing of anode materials in the US.The broader impact/commercial potential of this project is the development of a new anode technology capable of exploiting a dramatic improvement in lithium ion battery performance, which will speed the deployment of advanced lithium ion batteries for plug-in hybrid electric vehicles and all electric vehicles.