STTR Phase I: Realizing the Untapped Potential of Multielectron Insertion/Extraction Reactions in Lithium Ion Batteries

STTR 第一阶段：实现锂离子电池中多电子插入/脱出反应的未开发潜力

• 批准号: 1938515
• 负责人: Brian Schultz
• 金额: $ 22.5万
• 依托单位: Dimien Inc.
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-03-01 至 2020-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1938515&HistoricalAwards=false
• 关键词: STTR; Phase; Realizing; Untapped; Potential

The broader impact/commercial potential of this Small Business Technology Transfer Research (STTR) project is the commercialization of a high-capacity energy storage material with potential impact for electrified vehicles, grid-level energy storage, and portable electronic devices. Increased electric vehicle range and grid-level energy storage capacity would lead to greater market penetration of electrified vehicles, renewable energy sources, and batteries, with environmental benefits. This Small Business Technology Transfer Research (STTR) Phase I project aims to develop a lithium ion intercalation cathode that can reversibly access more than one lithium ion per reduction-oxidation center, boosting energy storage capacity substantially. The problem is that after nearly a decade commercially available lithium ions batteries such as the commercially dominant lithium cobalt oxide and its derivatives are still limited to just one lithium per redox center, which establishes an immutable constraint on performance. In fact, these materials likely represent the ultimate limit for intercalation reactions involving just one lithium. The recently discovered zeta-V2O5 polymorph demonstrates the reversible intercalation of multiple lithium ions per vanadium redox center reaching remarkable capacities without a loss in capacity due to poor structure stability. In fact, zeta-V2O5 demonstrates near zero expansion/contraction during charging and discharging. This project will focus on (1) a high throughput screening of compositional space with the aim of increasing the nominal voltage, (2) iterative coin cell fabrication and characterization to correlate composition to performance, and (3) post-mortem analysis of cell failure. Lithium ion zeta-V2O5 based battery prototypes will demonstrate the highly reversible accessibility of vanadium 5+/4+ and 4+/3+ redox couples, approaching the 440 mAh/g theoretical capacity.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.

这个小企业技术转让研究（STTR）项目的更广泛的影响/商业潜力是一种高容量储能材料的商业化，对电动汽车、电网级储能和便携式电子设备具有潜在的影响。电动汽车续航里程和电网级储能容量的增加将导致电动汽车、可再生能源和电池的市场渗透率提高，并带来环境效益。 小企业技术转移研究（STTR）第一阶段项目旨在开发一种锂离子嵌入阴极，该阴极可以可逆地访问每个还原-氧化中心的一个以上锂离子，从而大幅提高储能容量。问题在于，在近十年之后，商业上可获得的锂离子电池（诸如商业上占主导地位的锂钴氧化物及其衍生物）仍然限于每个氧化还原中心仅一个锂，这对性能形成了不可改变的限制。事实上，这些材料可能代表了仅涉及一种锂的嵌入反应的极限。最近发现的zeta-V2 O 5多晶型物证明了每个钒氧化还原中心的多个锂离子的可逆嵌入达到显著的容量，而没有由于差的结构稳定性而导致的容量损失。事实上，zeta-V2 O 5在充电和放电期间表现出接近零的膨胀/收缩。该项目将专注于（1）成分空间的高通量筛选，目的是提高标称电压，（2）迭代纽扣电池制造和表征，以将成分与性能相关联，以及（3）电池故障的事后分析。基于zeta-V2 O 5的锂离子电池原型将展示钒5+/4+和4+/3+氧化还原电对的高度可逆可及性，接近440 mAh/g的理论容量。该奖项反映了NSF的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。