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. ********

拟议的研究项目基于我们多元大学团队的成功，以开发锂离子电池（LIB）材料分析的先进特征，诊断和建模策略。通过加拿大汽车合作伙伴关系（APC）计划（2012-2016），我们强调了方法开发。在拟议的新的4年计划中，我们将采用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）已确定为对该公司的关键障碍开发新的电动汽车电池，可以以实际成本提供增加的能量密度。这些挑战包括需要高容量正（阴极）和负（阳极）电极材料，这些材料将使LIB的能量密度增加，从而满足美国能源部的下一代EV电池的能源和能量密度目标（350 WH/kg）和750 WH/L），并且需要增加所有在其正电极材料中包含M​​N化合物的LIB的使用寿命。克服这些挑战需要更深入地了解这些LIB材料的性能，因此，通用汽车在循环时必须对电池电池材料的结构和化学演化进行详细的表征。 通用汽车已与我们的多学科团队进行了合作 - 就像电子显微镜，核磁共振的领导者一样；电化学和数学建模。该项目的目的是对以下材料中发生的结构变化有充分的理解（1）高能镍 - 曼纳吉尼亚咖啡因（HE-NMC）阴极材料； （2）钛掺杂的高压锂镍锰氧化物尖晶石（LNMO）阴极材料； （3）使用阳离子螯合聚合物来减轻两种阴极材料的Mn毒性； （4）氧化硅（Si-ox）阳极材料。 我们建议将电极材料表征为组成和骑自行车条件的函数，并利用我们团队开发国际声誉的一系列高级表征策略。 ********