CAREER: Enabling High-performance Na-ion Battery Cathodes Via Structural Pillaring

事业：通过结构支柱实现高性能钠离子电池阴极

• 批准号: 2144296
• 负责人: Hao Liu
• 金额: $ 55.93万
• 依托单位: SUNY at Binghamton
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-02-01 至 2027-01-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2144296&HistoricalAwards=false
• 关键词: CAREER; Enabling; performance; Na; ion

The transition to renewable energy sources calls for large-scale energy storage solutions to cope with the intermittent energy generation by renewables, such as solar and wind. While lithium (Li)-ion batteries are widely used in portable devices and electric vehicles for energy storage, the high cost of lithium resources poses barriers to their adoption in large-scale applications, such as electric grid energy storage. Sodium (Na)-ion batteries are promising alternatives to Li-ion batteries for large-scale deployment because of the ubiquity of sodium. However, current Na-ion batteries are plagued by several deleterious processes, which compromise their performance and undermine their deployment for grid energy storage. Strategies to overcome these shortcomings must be developed to realize high-performance Na-ion batteries. The research project will investigate structural pillaring as an effective strategy to address the challenges of Na-ion battery electrodes. The research program will train both undergraduate and graduate students for the clean energy workforce in the United States. The educational and outreach programs will implement an interactive pedagogy in teaching and promoting the science of electrochemical energy storage to an audience at all levels. This will involve the development of educational games as a platform to engage learners at all levels. These educational kits will be integrated into the curriculum development on electrochemical energy storage and various outreach programs targeting both K-12 students and teachers.The goal of the research is to elucidate the fundamental material descriptors for the ion-ion and ion-lattice interactions, which underpin a range of deleterious phase transitions of layered transition metal oxide electrodes for not only the Na-ion intercalation but also other beyond-Li-ion, such as K- and Ca-ion, chemistries. The fundamental contribution of this research is the identification of the material descriptors for the interactions of the layered metal oxide, which will allow for the rational design of the property and the intercalation chemistry of the layered transition metal oxides. Adopting the Na-based layered transition metal oxide as the model compound, the research will elucidate how changes in the ion-ion and the ion-lattice interactions, which is realized by varying the composition and nature of the intercalant ions, affect the layer-gliding phase transition, Na-ion/vacancy ordering, Na-ion diffusion, and the chemical and electrochemical stability of the layered oxides. These properties and processes will be characterized by a suite of complementary electrochemical, structural, and thermal analytical techniques. The outcome of this research will lead to a rational solution to overcome the barriers for the reversible Na-ion intercalation at high voltages. The practical implication is the development of “designer materials” that suppress/mitigate the deleterious phase transitions and processes in the intercalation reaction, thereby enabling high-performance energy storage materials.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.

向可再生能源的过渡需要大规模的储能解决方案，以科普太阳能和风能等可再生能源的间歇性发电。虽然锂（Li）离子电池广泛用于便携式设备和电动汽车的能量存储，但锂资源的高成本对其在电网能量存储等大规模应用中的采用构成了障碍。由于钠的普遍存在，钠（Na）离子电池是大规模部署的锂离子电池的有前途的替代品。然而，目前的钠离子电池受到几种有害过程的困扰，这些过程损害了它们的性能并破坏了它们用于电网储能的部署。必须开发克服这些缺点的策略以实现高性能的钠离子电池。该研究项目将研究结构柱撑作为解决钠离子电池电极挑战的有效策略。该研究项目将为美国的清洁能源劳动力培养本科生和研究生。教育和推广计划将实施互动教学法，向各级观众教授和推广电化学储能科学。这将涉及开发教育游戏，作为吸引各级学习者的平台。这些教育工具包将被整合到电化学储能的课程开发和针对K-12学生和教师的各种推广计划中。研究的目标是阐明离子-离子和离子-晶格相互作用的基本材料描述符，这不仅对Na-离子嵌入以及其他锂离子以外的化学，例如K离子和Ca离子。本研究的基本贡献是确定的层状金属氧化物的相互作用的材料描述符，这将允许合理设计的性能和层状过渡金属氧化物的嵌入化学。以钠基层状过渡金属氧化物为模型化合物，研究了通过改变插层离子的组成和性质，改变离子-离子和离子-晶格相互作用，对层状氧化物的层间滑移相变、钠离子/空位有序化、钠离子扩散以及化学和电化学稳定性的影响。这些特性和过程将通过一套互补的电化学，结构和热分析技术来表征。本研究的结果将导致一个合理的解决方案，以克服在高电压下的可逆钠离子嵌入的障碍。该奖项的实际意义是开发“设计材料”，抑制/减轻嵌入反应中的有害相变和过程，从而实现高性能储能材料。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。