SBIR Phase I: High Discharge Rate Rechargeable Lithium Batteries Based on Novel Cathode Materials

小企业创新研究(SBIR)第一阶段项目专注于开发用于高放电率应用的新型锂基正极材料。在过去的十年中，人们对锂锰尖晶石的商业化进行了大量的尝试，但由于循环寿命较短和放电率较低，取得的成功有限。已经开发了专有的合成技术来稳定有缺陷的锂锰尖晶石，这种尖晶石以薄膜形式存在，具有高容量(230 mah/g)、长循环寿命(700个循环)和高放电率(25C)。这些材料是用一种特殊的气相活性氧(VPAO)方法制备的。本项目旨在探索VPAO法合成用于高放电率应用的块体电极的可行性。利用VPAO技术将探索两种方法：(I)将薄膜技术直接放大到厚膜；(Ii)通过气相成核过程合成有缺陷的锰尖晶石粉末。锂基电池目前用于低功率应用。拟议研究的成功将使锂电池能够占领电动工具和电动汽车等高性能应用的市场，以及便携式电池市场。

The Small Business Innovation Research (SBIR) Phase I project focuses on the development of novel lithium based cathode materials for high discharge rate applications. Significant attempts have been made in the past decade to commercialize lithium manganospinels but have met with limited success due to poor cycle life and low rate dischargeability. Proprietary synthesis technologies have been developed to stabilize defective lithium manganospinels, which in thin film form, exhibit high capacity ( 230 mAH/g), long cycle life( 700 cycle) and high discharge rates ( 25C). These materials have been fabricated using a special Vapor Phase Activated Oxygen (VPAO) method. This project proposes to explore the feasibility of the VPAO method to synthesize bulk electrodes for high discharge rate applications. Two methods will be explored using the VPAO techniques: (i) direct scale-up of the thin film technology to thick films and (ii) synthesis of defective manganospinel powders by gas phase nucleation process. Li-based batteries are presently used in low power applications. Success of the proposed research will allow lithium batteries to capture the market for high-powered applications such as power tools and electric vehicles, as well as the portable batteries market.