Collaborative Research: Hybrid Block Copolymer Electrodes for Electrochemical Energy Storage

项目负责人：Lutkenhaus， Jodie / Verduzco， rafael提案编号：1336716 / 1336073机构：德克萨斯工程实验站/William Marsh Rice大学标题：合作研究：用于电化学能量存储的混合嵌段共聚物电极通过电化学手段（电池，电容器）存储能量对于为先进的运输和便携式电子设备提供动力至关重要。下一代储能材料必须同时满足许多标准：优秀的电荷和离子传输，高容量和可逆电荷转移。因此，经常探索电子和离子导电聚合物作为添加剂在阴极如V2O5、LiCoO2、LiFePO4等中形成杂化电极。不幸的是，由于电极之间的大规模相分离和结构控制不佳，获得一种成功平衡电子和离子输运与电荷转移的混合电极仍然非常困难。S各种成分。该项目将研究基于聚（3-烷基噻吩）-嵌段聚（环氧乙烷）（P3AT-b-PEO）多功能嵌段共聚物和V2O5纳米结构共混物的储能混合电极模型系统。P3AT-b-PEO具有同时输运电子和离子的能力，V2O5是锂离子电池常用的高容量正极材料。V2O5将在选定的聚合物块中使用？结构指导吗?合成。pi假设通过自下而上的组装方法，所得到的杂化材料将具有有机和无机组分的良好特性。该项目将确定嵌段共聚物的组成和形貌之间的关系，因为它受V2O5、侧链功能化和电化学性能的影响。嵌段共聚物形态与电荷转移、电子传递和离子传递之间的关系从未被系统地研究过，因此本文的研究将为指导多功能嵌段共聚物储能的发展奠定广泛的知识基础。首先，pi将建立含有单侧链嵌段共聚物和V2O5的杂化电极的形态与电化学性能之间的关系（目标1和2）。这些知识将应用于更广泛的具有不同侧链化学性质的嵌段共聚物家族，以平衡电化学性能和可加工性。拟议的工作将通过教育活动和外联在科学界以及公众中产生更广泛的影响。在科学界，这项工作将为电极中的多功能嵌段共聚物建立知识库，其中几个过程（反应和扩散）必须平衡。pi将开展教育活动，包括通过丰富工程经验接待高中教师，为休斯敦社区学院系统中有才华的、代表性不足的群体提供暑期研究机会，在休斯敦地区的高中举办新星赞助的、以材料科学为主题的科学研讨会，以及在TAMU和莱斯大学组织德克萨斯软物质会议。

PI: Lutkenhaus, Jodie / Verduzco, RafaelProposal Number: 1336716 / 1336073Institution: Texas Engineering Experiment Station/William Marsh Rice UniversityTitle: Collaborative Research: Hybrid Block Copolymer Electrodes for Electrochemical Energy StorageStorage of energy through electrochemical means (batteries, capacitors) is critical to providing power for advanced transportation and portable electronics. Next-generation energy storage materials must simultaneously satisfy a number of criteria: excellent charge and ion transport, high capacity, and reversible charge transfer. For this reason, electron- and ion-conducting polymers are often explored as additives in cathodes such as V2O5, LiCoO2, LiFePO4, etc. to form hybrid electrodes. Unfortunately, it remains extremely difficult to obtain a hybrid electrode that successfully balances electron and ion transport with charge transfer because of large-scale phase separation and poor structure control among the electrode?s various components. This project will investigate a model system of hybrid electrodes for energy storage based on nanostructured blends of poly(3-alkylthiophene)-block-poly(ethylene oxide) (P3AT-b-PEO) multifunctional block copolymers and V2O5. P3AT-b-PEO is capable of simultaneous electron and ion transport, and V2O5 is a commonly explored high-capacity cathode material for Li-ion batteries. V2O5 will be synthesized within selected polymer blocks using ?structure directed? synthesis. The PIs hypothesize that through bottom- up assembly methods, the resulting hybrid materials will exhibit favorable properties characteristic of both organic and inorganic components. This project will determine the relationship between block copolymer composition and morphology as it is affected by V2O5, side chain functionalization, and electrochemical performance. The relationship between block copolymer morphology and charge transfer, electron transport, and ion transport has never before been systematically investigated as a whole, so the proposed research will establish a broad knowledge base to guide the development of multifunctional block copolymers for energy storage. First, the PIs will establish relationships between the morphology of hybrid electrodes containing block copolymer bearing a single type of side chain and V2O5 and electrochemical performance (Objectives 1 and 2). This knowledge will then be applied to a wider family of block copolymers of varying side chain chemistry so as to balance electrochemical properties with processability.The proposed work will have broader impacts within the scientific community as well as the general public through educational activities and outreach. Within the scientific community, this work will establish a knowledge base for multifunctional block copolymers in electrodes, where several processes (reaction and diffusion) must be balanced. The PIs will pursue educational activities including hosting high school teacher(s) through Enrichment Experiences in Engineering, providing summer research opportunities for talented, underrepresented groups from the Houston Community College system, hosting Nova-sponsored, materials science-themed Science Cafés at Houston-area high schools, and organizing Texas Soft Matter Meetings at TAMU and Rice University.