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

SBIR第一阶段：基于新型正极材料的高放电率可充电锂电池

• 批准号: 0232727
• 负责人: Deepika Singh
• 金额: $ 10万
• 依托单位: SINMAT, INC.
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-01-01 至 2003-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0232727&HistoricalAwards=false
• 关键词: SBIR; Phase; Discharge; Rate; Rechargeable

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.

小企业创新研究（SBIR）第一期项目侧重于开发用于高放电倍率应用的新型锂基正极材料。在过去的十年中，人们对锰尖晶石的商业化进行了重大尝试，但由于循环寿命短和充放电率低，成功程度有限。开发了专有的合成技术来稳定有缺陷的锰尖晶石，薄膜形式的锰尖晶石具有高容量（230 mAH/g），长循环寿命（700次循环）和高放电率（25℃）。这些材料是用一种特殊的气相活性氧（VPAO）方法制备的。本课题拟探索用VPAO方法合成高放电率大块电极的可行性。利用VPAO技术将探索两种方法：(i)薄膜技术直接放大到厚膜和（ii）通过气相成核工艺合成有缺陷的锰尖晶石粉末。锂基电池目前用于低功耗应用。这项研究的成功将使锂电池能够占领高功率应用市场，如电动工具和电动汽车，以及便携式电池市场。