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: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=652277
• 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的成功基础上。通过加拿大汽车合作伙伴计划（2012-2016），我们强调了方法开发。在拟议的新的4年计划中，我们将利用我们的APC计划的发现来解决一系列技术挑战和相关的科学问题，我们的工业合作伙伴通用汽车（GM）已经确定为开发新的电动汽车电池的主要障碍，这些电池可以在实际成本下提供更高的能量密度。这些挑战包括需要高容量的正（阴极）和负（阳极）电极材料，以提高锂电池的能量密度，满足美国能源部对下一代电动汽车电池的能量和能量密度目标（分别为350 Wh/kg和750 Wh/l），以及需要增加正极材料中含有Mn化合物的所有锂电池的使用寿命。克服这些挑战需要更全面地了解这些锂电池材料随着时间的推移的性能，因此，通用汽车迫切需要详细描述电池电池材料在循环过程中的结构和化学演变。通用汽车一直在寻求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)利用阳离子螯合聚合物减轻这两种正极材料的锰中毒；(4)氧化硅（Si-Ox）负极材料。我们建议将电极材料作为组成和循环条件的函数进行表征，利用我们的团队已经在国际上享有声誉的一套先进的表征策略。＊＊＊＊＊＊＊＊