Understanding and Controlling Ionic Behaviors in Heterostructured Metal-Organic-Frameworks for Selective Magnesium Ion Transport

非技术性总结：控制固态材料中的离子传输至关重要。例如，能够选择性地移动固态膜中的离子可以使下一代电池能够利用廉价且安全的材料（例如镁）。限制这一领域研究进展的一个关键挑战是难以实现所需的选择性。也就是说，促进一种离子的运动而抑制其他离子是极其困难的。解决这个问题的一个有前途的解决方案是将多种材料成分联合收割机组合成单一的固态结构。由此产生的材料极大地扩展了选择性离子传输的可能性。在材料研究部门的固态和材料化学计划的资助下，来自波士顿学院的Wang，Bao和Mohanty博士建立并研究了一种新型的固态膜结构，该结构具有快速和选择性镁离子传输的潜力。他们选择了一种多功能的金属有机框架作为模型平台，其中包括多组分结构层。预期整体结构促进镁离子运输，同时抑制不需要的物质的移动。为了加强项目的影响，提供教育机会，让本科研究人员参与研究项目。此外，还开展了补充性外联活动，向公众宣传材料研究对可持续未来的影响。技术总结：在材料研究部固态和材料化学计划的资助下，该项目研究了多价离子的快速和选择性传输（例如，Mg）在基于金属有机骨架（MOF）的材料中。来自波士顿学院的Wang，Bao和Mohanty博士利用他们在合成，电化学表征，材料设计以及离子传输的理论和计算工具集方面的专业知识。他们合作测试了一个假设，即通过调整结构组分可以实现多价离子通过基于MOF的材料的快速和选择性运输。该研究的独特之处在于设计了一种基于MOF的异质结构平台，该平台由多组分层组成，适当定制以实现Mg2+传输，抑制溶剂分子和阴离子的运动，同时保持合理的电导率。该研究工作与教育计划相辅相成，旨在通过让本科研究人员参与该项目来扩大影响，以及研究人员的活动，教育公众了解材料研究对可持续未来的重要性。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。

Non-technical summary: Controlling ionic transport in solid-state materials is of fundamental importance. For example, being able to selectively move ions in a solid-state film may enable the utilization of cheap and safe materials (such as magnesium) for next-generation batteries. A critical challenge limiting research progress in this area is the difficulty in achieving the desired selectivity. That is, it is exceedingly difficult to promote the movement of one type of ion and to suppress others. A promising solution to this problem is to combine multiple material components into a single solid-state structure. The resulting material greatly expands the possibility of selective ion transport. With funding from the Solid State and Materials Chemistry Program in the Division of Materials Research, Drs. Wang, Bao, and Mohanty from Boston College build and study a new type of architecture in solid-state films that has the potential for fast and selective magnesium ion transport. They chose a versatile metal-organic framework as a model platform, which includes multiple-component structured layers. The overall structure is expected to promote magnesium ion transport while suppressing the movement of unwanted species. To enhance the impacts of the project, educational opportunities are provided to engage undergraduate researchers in the research project. Moreover, complementary outreach activities are developed to inform the general public of the implications of materials research for a sustainable future. Technical summary: With funding from the Solid State and Materials Chemistry Program in the Division of Materials Research, this project investigates fast and selective transport of multivalent ions (e.g., Mg) in metal-organic framework (MOF) based materials. Drs. Wang, Bao, and Mohanty from Boston College leverage their expertise in synthesis, electrochemical characterization, material design, and theoretical and computational toolsets for ionic transport. They collaborate to test the hypothesis that fast and selective transport of multivalent ions through MOF-based materials can be achieved through tuning the structural components. The distinctiveness of the study is the design of a MOF-based heterostructure platform that consists of multiple-component layers, suitably tailored to enable Mg2+ transport, suppressing the movement of the solvent molecules and the anions, while maintaining reasonable conductivity. The research efforts are complemented with educational plans aimed at broadening the impacts by engaging undergraduate researchers in the project, and the researchers’ activities to educate the general public about the significance of materials research for a sustainable future.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.