2018英特尔ISEF学科最佳作品摘要：能源化学 Best of Category Abstract: ENERGY: CHEMICAL

获奖作品基本信息

年份	2018
学科	能源化学 ENERGY: CHEMICAL
学校	Henry M. Jackson High School
国家/州	WA，United States of America

获奖作品名称

A Novel Sol-Gel Derived SPEEK/Silicon Dioxide Composite Membrane for the Vanadium Redox Flow Battery

获奖作品摘要

Vanadium redox flow batteries (VRFBs) are industrial-scale batteries that are being considered for the storage of solar, wind, and other forms of renewable energy in power plants. The ion exchange membrane, which accounts for up to 40% of the overall cost, is a crucial component of the battery as its performance in transporting protons and preventing vanadium electrolyte crossover determines the voltage and coulombic efficiencies of the battery, respectively. A promising material for VRFB membranes is sulfonated poly (ether ether ketone) or SPEEK, due to its low cost and low vanadium ion permeability. In this study, in order to further decrease the permeability of the SPEEK membrane while increasing proton transport, a novel SPEEK/SiO2 composite membrane was synthesized by the sol-gel process using tetraethyl orthosilicate (TEOS) as the silica precursor. This composite membrane was shown to have a vanadium ion permeability 55% lower than that of the original SPEEK membrane, an improvement attributable to gap-filling by SiO2 in the SPEEK polymer matrix. Moreover, after SiO2 was introduced, a tenfold increase in proton conductivity was observed. The performance of the SPEEK/SiO2 composite in these tests was also an improvement over DuPont’s Nafion?? membrane, which is considered to be the industry standard. Finally, an economic analysis showed that the total cost for the SPEEK/SiO2 composite is 30% lower than that of Nafion?? at scale. These results are very encouraging for the prospects of commercialization of VRFBs, as not only does this membrane significantly increase the efficiency, but it lowers the cost.

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高中生科研学术活动 英特尔 Intel ISEF 简介

英特尔国际科学与工程大奖赛，简称 "ISEF"，由美国 Society for Science and the Public（科学和公共服务协会）主办，英特尔公司冠名赞助，是全球规模最大、等级最高的中学生的科研科创赛事。ISEF 的学术活动学科包括了所有数学、自然科学、工程的全部领域和部分社会科学。ISEF 素有全球青少年科学学术活动的“世界杯”之美誉，旨在鼓励学生团队协作，开拓创新，长期专一深入地研究自己感兴趣的课题。

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· 数学 · 物理 · 化学 · 生物 · 计算机 · 工程 ·

学科简介：能源化学 ENERGY: CHEMICAL

Studies involving biological and chemical processes of renewable energy sources, clean transport, and alternative fuels.

Subcategories:

Alternative Fuels (ALT): Any method of powering an engine that does not involve petroleum (oil). Some alternative fuels are electricity, methane, hydrogen, natural gas, and wood.

Computational Energy Science (COM): A study that applies the discipline and techniques of computer science and mathematics to solve large and complex problems in Energy Science.

Fossil Fuel Energy (FOS): Studies involving energy from a hydrocarbon deposit, such as petroleum, coal, or natural gas, derived from living matter of a previous geologic time and used for fuel.

Fuel Cells and Battery Development (FUE): The study, analysis and development of fuel cells and batteries that convert and/or store chemical energy into electricity.

Microbial Fuel Cells (MIC): The study of fuel cells that use or mimic bacterial interactions found in nature to produce electricity.

Solar Materials (SOL): The study of materials used to convert and store solar energy through chemical changes. This includes topics such as thermal storage and photovoltaic materials.

Other (OTH): Studies that cannot be assigned to one of the above subcategories. If the project involves multiple subcategories, the principal subcategory should be chosen instead of Other.