Structural evolution of electrode materials and mitigation of degradation by mn-trapping in li-ion batteries via complementary characterization methods and mathematical modeling

通过互补表征方法和数学建模，电极材料的结构演变以及锂离子电池中锰捕获减缓降解

• 批准号: 494074-2016
• 负责人: Goward, Gillian
• 金额: $ 14.53万
• 依托单位: McMaster University
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=694179
• 关键词: Structural; evolution; electrode; materials; mitigation

The proposed research projects build on our multi-university team's success with regard to developing advanced characterization, diagnostic and modeling strategies for lithium ion battery (LIB) material analysis. Through the Automotive Partnerships Canada (APC) program (2012-2016) we emphasized methods development. In the proposed, new 4-year program, we will employ the findings of our APC program to resolve a series of technical challenges, and associated scientific problems, that our industrial partner, General Motors (GM), has identified as key impediments to the development of new electrified vehicle batteries that can provide increased energy density at a practical cost. These challenges include the need for high capacity positive (cathode) and negative (anode) electrode materials that will enable increased energy density in LIBs that satisfy the United States Department of Energy's energy and energy density targets for next generation EV batteries (350 Wh/kg and 750 Wh/l, respectively) and the need to increase the useful life of all LIBs that contain Mn compounds in their positive electrode materials. Overcoming these challenges requires a fuller understanding of the performance of these LIB materials over time and, therefore, GM vitally needs a detailed characterization of the structural and chemical evolution of battery cell materials upon cycling. GM has pursued a collaboration with our multi-disciplinary team - comprised, as it is, of leaders in the fields of electron microscopy, nuclear magnetic resonance; electrochemistry and mathematical modelling. The objective of the project is to develop a full understanding of the structural changes that occur within the following materials (1) high-energy nickel-managanese-cobalt oxide (HE-NMC) cathode materials; (2) titanium-doped high voltage lithium nickel manganese oxide spinel (LNMO) cathode materials; (3) the mitigation of Mn-poisoning for both of these cathode materials using cation chelating polymers; and (4) Silicon-monoxide (Si-Ox) anode materials. We propose to characterize electrode materials as a function of composition, and cycling conditions, utilizing the set of advanced characterization strategies for which our team has developed an international reputation.

拟议的研究项目建立在我们的多所大学团队在开发锂离子电池 (LIB) 材料分析的先进表征、诊断和建模策略方面所取得的成功之上。通过加拿大汽车合作伙伴 (APC) 计划（2012-2016），我们强调方法开发。在拟议的新的 4 年计划中，我们将利用 APC 计划的研究结果来解决一系列技术挑战和相关科学问题，我们的工业合作伙伴通用汽车 (GM) 已将这些问题确定为实现这一目标的主要障碍。开发新型电动汽车电池，能够以实际成本提供更高的能量密度。这些挑战包括需要高容量正（阴极）和负（阳极）电极材料，以提高锂离子电池的能量密度，以满足美国能源部下一代电动汽车电池的能量和能量密度目标（350 Wh/kg）和 750 Wh/l），以及提高正极材料中含有锰化合物的所有锂离子电池的使用寿命的需要。克服这些挑战需要更全面地了解这些锂离子电池材料随时间推移的性能，因此，通用汽车迫切需要对电池材料在循环过程中的结构和化学演化进行详细表征。 通用汽车一直致力于与我们的多学科团队合作，该团队由电子显微镜、核磁共振领域的领导者组成；电化学和数学建模。该项目的目标是全面了解以下材料中发生的结构变化（1）高能镍锰钴氧化物（HE-NMC）正极材料； （2）掺钛高压锂镍锰氧化物尖晶石（LNMO）正极材料； (3)使用阳离子螯合聚合物减轻这两种正极材料的锰中毒； (4)一氧化硅(Si-Ox)负极材料。 我们建议利用我们的团队赢得国际声誉的一套先进表征策略，将电极材料表征为成分和循环条件的函数。