SUSCHEM: Aquous organic redox chemistry for renewal energy storage

SUSCHEM：用于再生能量存储的水性有机氧化还原化学

• 批准号: 1509041
• 负责人: Michael Aziz
• 金额: $ 30万
• 依托单位: Harvard University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-09-01 至 2018-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1509041&HistoricalAwards=false
• 关键词: SUSCHEM; Aquous; organic; redox; chemistry

PI: Michael J. AzizProposal Number: 1509041As more wind and solar energy sources are harnessed to generate electricity, the intermittent nature of these supplies requires the deployment of electrical energy storage capacity to stabilize the grid. Existing technologies for storing vast amounts of electricity are either too expensive or ultimately limited by other factors, such as geographic location, or the lack of critical materials needed for large-scale manufacture of energy storage systems. Redox flow batteries are a promising new technology for storing large amounts of electricity as electrochemical energy, but suffer from many technical challenges, including use of expensive or rare materials, flammability of organic solvents used as electrolytes, and low electrochemical energy storage capacity. The goal of this project is to develop a new electrolyte for redox flow batteries based on organic compounds called quinones that are dissolved in water as the solvent. This electrolyte is potentially inexpensive, noncorrosive, nontoxic, and nonflammable. The proposed research will design quinone molecules to improve electrochemical energy storage capacity, and develop fundamental understanding of their underlying electrochemical processes. As part of the educational activities of this project, interactive presentations and demonstrations on energy conservation and renewable energy topics will be developed for the public programs offered through the Boston Museum of Science.This project will explore new electrolytes for redox flow batteries based on aqueous quinones. Some quinones and comparable molecules are nontoxic and have the potential to improve electrochemical energy storage capacity, avoid acid corrosion, and reduce the potential for flammability based elimination of organic solvents. In neutral and basic solution, certain quinones undergo reversible two-electron processes, but these processes are poorly understood. Since two-electron reduction stores twice the energy of single-electron reduction, it is hypothesized that the use of aqueous quinones as electrolytes could improve electrochemical storage capacity for redox flow battery applications. The goal of the research is to develop a fundamental understanding of two-electron reduction process by quinones and comparable molecules in alkaline medium through substituent modification of quinones guided by molecular design of their proton transfer processes. The roles of intermolecular and intramolecular hydrogen bonding, as well as interactions with electrolyte cations and anions, in enabling two-electron reduction processes will be elucidated. Further studies will clarify the role of molecular geometry, substituent groups, and electronic structure on the electrochemical behavior of this process. The research outcomes could suggest new electrolyte systems for redox flow batteries which are more efficient, cost less, and are safer than existing systems for electrochemical-based mass storage applications. Furthermore, an interactive demonstration based on a redox flow battery from the PI's laboratory will be developed for the Boston Museum of Science.

主要研究者：Michael J. Aziz提案编号：1509041随着越来越多的风能和太阳能被用于发电，这些供应的间歇性要求部署电能存储容量以稳定电网。 现有的储存大量电力的技术要么过于昂贵，要么最终受到其他因素的限制，例如地理位置，或者缺乏大规模制造储能系统所需的关键材料。 氧化还原液流电池是用于将大量电存储为电化学能的有前景的新技术，但是遭受许多技术挑战，包括使用昂贵或稀有材料、用作电解质的有机溶剂的易燃性以及低电化学能存储容量。 该项目的目标是开发一种用于氧化还原液流电池的新型电解质，该电解质基于溶于水作为溶剂的称为醌的有机化合物。 这种电解质可能是廉价的、无腐蚀性的、无毒的和不可燃的。拟议的研究将设计醌分子，以提高电化学储能能力，并发展其潜在的电化学过程的基本理解。 作为该项目教育活动的一部分，将为波士顿科学博物馆提供的公共项目开发有关节能和可再生能源主题的互动演示和演示。该项目将探索基于含水醌的氧化还原液流电池的新电解质。 一些醌和类似的分子是无毒的，并且具有改善电化学能量储存容量、避免酸腐蚀和降低基于可燃性的有机溶剂消除的可能性的潜力。 在中性和碱性溶液中，某些醌会发生可逆的双电子过程，但人们对这些过程知之甚少。 由于双电子还原储存的能量是单电子还原的两倍，因此假设使用醌水溶液作为电解质可以提高氧化还原液流电池应用的电化学储存容量。本研究的目的是通过对醌类化合物的取代基修饰，并以其质子转移过程的分子设计为指导，对醌类化合物及其类似分子在碱性介质中的双电子还原过程有一个基本的了解。分子间和分子内氢键的作用，以及与电解质阳离子和阴离子的相互作用，使两个电子还原过程将得到阐明。 进一步的研究将阐明分子几何形状、取代基和电子结构对该过程电化学行为的作用。 研究结果可以为氧化还原液流电池提供新的电解质系统，这些系统比现有的基于电化学的大容量存储应用系统更有效，成本更低，更安全。 此外，将为波士顿科学博物馆开发基于PI实验室氧化还原液流电池的交互式演示。