SusChEM: Ultra-High Li+ Ion Conductivity Chemically Stable Mechanically Strong Mixed Oxy-Sulfide Solid Electrolytes

SusChEM：超高锂离子电导率、化学稳定、机械强度高的混合硫氧化物固体电解质

• 批准号: 1438223
• 负责人: Steve Martin
• 金额: $ 30万
• 依托单位: Iowa State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-09-01 至 2019-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1438223&HistoricalAwards=false
• 关键词: SusChEM; Ultra; Li+; Ion; Conductivity

Principal Investigator: Steve W. MartinNumber: 1438223Lithium batteries used in electric and hybrid vehicles suffer from many problems. Current designs can hold 10% of their theoretical amount of energy content, contain highly flammable organic liquids, are relatively costly, and do not last as long as a typical automobile. New materials are needed to address these problems. In particular, advanced ceramic materials have the potential to solve these problems by enabling the manufacture of high capacity, safe, low-cost, and long-lasting solid state lithium batteries. Towards this end, this research will incorporate both oxygen and sulfur into the ceramic material used in these batteries to make new oxygen-sulfide ceramic materials with desirable properties. The overall goal of this project is to develop and study this new class of mixed oxy-sulfide ceramic materials for lithium batteries. Oxide materials are safe and have good mechanical strength, whereas sulfide materials allow for the fast lithium ion transfer needed for rapid electricity discharge and re-charging. The project is also designed to promote student learning and professional development in the context of this research through mentoring and leadership activities. To broaden participation, existing successful programs at Iowa State University will be used to collaborate with minority-focused institutions and minority programs to provide research experiences for students from underrepresented groups in science and engineering. The project will also collaborate with federal government laboratories and automotive companies engaged in automotive battery research.Technical DescriptionThe overall goal of this project is to develop and study a new class of mixed oxy-sulfide ceramics for use in solid-state lithium batteries in scalable electrochemical energy storage systems. All-oxide solid electrolytes possess excellent chemical durability and good mechanical strength, but have to be processed at very high temperatures, and possess lithium ion conductivities that are too low for automotive applications. All-sulfide solid electrolytes possess extremely high lithium ion conductivities, can be easily processed at room temperature, but are very reactive with both air and moisture. This project will investigate the potential of mixed oxy-sulfide solid electrolytes to provide desirable characteristics associated with both oxide and sulfide ceramic materials. Preliminary work on all-sulfide solid electrolytes has demonstrated that the addition of molecular oxygen to the electrolyte decreased the volumetric strain energy for lithium ion conduction by replacing bridging sulfurs. This project will study this new mixed oxy-sulfide mixed network for the potential to simultaneously reduce both the strain and coulomb components of the conductivity activation energy. The new solid-state chemistries are expected to lead to high conductivity, high chemical durability, and mechanically strong mixed oxy-sulfide based solid electrolytes. The project is also designed to promote student learning and professional development in the context of this research through mentoring and leadership activities. To broaden participation, existing successful programs at Iowa State University will be used to collaborate with minority-focused institutions and minority programs to provide research experiences for students from underrepresented groups in science and engineering. The project will also collaborate with federal government laboratories and automotive companies engaged in automotive battery research.

主要研究人员：史蒂夫·W·马丁纳伯（Steve W.当前的设计可以容纳其理论量的10％的能量含量，其中包含高度易燃的有机液体，相对昂贵，并且持续不如典型的汽车。 需要新材料来解决这些问题。 特别是，高级陶瓷材料有可能通过实现高容量，安全，低成本和持久的固态锂电池来解决这些问题。为此，这项研究将将氧气和硫纳入这些电池中用于制造具有理想特性的新型氧硫化物陶瓷材料中的陶瓷材料中。该项目的总体目标是开发和研究锂电池的新型混合氧硫化物陶瓷材料。 氧化物材料是安全的，具有良好的机械强度，而硫化物材料则可以使快速电力排放和重新充电所需的快速锂离子转移。该项目还旨在通过指导和领导活动在这项研究的背景下促进学生学习和专业发展。 为了扩大参与，爱荷华州立大学的现有成功计划将用于与以少数族裔的机构和少数民族计划合作，为科学与工程领域代表性不足的团体的学生提供研究经验。 该项目还将与从事汽车电池研究的联邦政府实验室和汽车公司合作。技术描述该项目的总体目标是开发和研究一类新的混合氧化硫化物陶瓷，用于在可扩展的电化学电化学储能系统中用于固态锂电池。 全氧化物固体电解质具有出色的化学耐用性和良好的机械强度，但必须在非常高的温度下处理，并且具有对汽车应用太低的锂离子电导率。全硫化固体电解质具有极高的锂离子电导率，可以在室温下轻松处理，但对空气和水分都具有反应性。该项目将研究混合氧硫化物固体电解质的潜力，以提供与氧化物和硫化物陶瓷材料相关的理想特性。在全硫化固体电解质上的初步工作表明，在电解质中添加分子氧，通过替换桥接的硫磺来降低锂离子传导的体积应变能。 该项目将研究这个新的混合氧混合混合网络，以同时减少电导率激活能的应变和库仑成分。 预计新的固态化学物质将导致高电导率，高化学耐用性和机械强的混合氧基固体电解质。 该项目还旨在通过指导和领导活动在这项研究的背景下促进学生学习和专业发展。 为了扩大参与，爱荷华州立大学的现有成功计划将用于与以少数族裔的机构和少数民族计划合作，为科学与工程领域代表性不足的团体的学生提供研究经验。 该项目还将与从事汽车电池研究的联邦政府实验室和汽车公司合作。