Collaborative Research: Hybrid Block Copolymer Electrodes for Electrochemical Energy Storage

主要研究者：Lutkenhaus，Jodie / Verduzco，Rafael提案编号：1336716 /1336073机构：德克萨斯工程实验站/威廉马什赖斯大学标题：合作研究：混合嵌段共聚物电极用于电化学能量存储通过电化学手段（电池，电容器）存储能量对于为先进的运输和便携式电子产品提供电力至关重要。下一代储能材料必须同时满足许多标准：优异的电荷和离子传输、高容量和可逆的电荷转移。为此，电子和离子导电聚合物通常被用作阴极中的添加剂，例如V2 O 5、LiCoO 2、LiFePO 4等，以形成混合电极。不幸的是，它仍然是非常困难的，以获得一个混合电极，成功地平衡电子和离子传输与电荷转移，因为大规模的相分离和不良的结构控制之间的电极？的各种组件。该项目将研究基于聚（3-烷基噻吩）-嵌段-聚（环氧乙烷）（P3 AT-b-PEO）多功能嵌段共聚物和V2 O 5的纳米结构共混物的储能混合电极模型系统。P3 AT-b-PEO能够同时传输电子和离子，并且V2 O 5是通常开发的用于锂离子电池的高容量阴极材料。五氧化二钒将合成内选定的聚合物块使用？结构导向？合成. PI假设通过自下而上的组装方法，所得的杂化材料将表现出有机和无机组分的有利特性。该项目将确定嵌段共聚物组成和形态之间的关系，因为它受到V2 O 5，侧链官能化， 和 电化学 性能 的 关系 内区组 共聚物形态和电荷转移、电子传输和离子传输以前从未被系统地作为一个整体进行研究，因此所提出的研究将建立广泛的知识基础，以指导用于能量存储的多功能嵌段共聚物的开发。首先，PI将建立包含具有单一类型侧链的嵌段共聚物和V2 O 5的混合电极的形态与电化学性能之间的关系（目标1和2）。这些知识将被应用于更广泛的不同侧链化学的嵌段共聚物，以平衡电化学性能与加工性能。拟议的工作将通过教育活动和推广活动在科学界和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一个知识库，其中必须平衡几个过程（反应和扩散）。PI将开展教育活动，包括通过丰富工程经验接待高中教师，为休斯顿社区学院系统中有才华，代表性不足的群体提供夏季研究机会，在休斯顿地区高中举办Nova赞助的材料科学主题科学咖啡馆，并在TAMU和赖斯大学组织德克萨斯州软物质会议。

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.