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Novel ceramic-polymer hybrid electrolytes for Li-ion solid state batteries: interrelation of interface structure and morphology with ion transport

用于锂离子固态电池的新型陶瓷聚合物混合电解质：界面结构和形态与离子传输的相互关系

基本信息

批准号：
336986971
负责人：
Professor Dr. Oliver Clemens
金额：
--
依托单位：
Helmholtz-Zentrum hereon GmbH
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2017
资助国家：
德国
起止时间：
2016-12-31 至 2021-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/336986971?language=en
关键词：
Novel ceramic polymer hybrid electrolytes

项目摘要

Solid state batteries based on Li-ion technology are promising candidates for high energy density, safe and stable storage devices. A major issue for the development of such batteries is the manufacture of suitable composite cathodes. Material- and processing solutions are required to provide the electrode with high electric conductivity in order to minimize ohmic losses as well as provide elasticity to compensate volume changes. Also, single-ion electrolytes are preferred to avoid polarization effects. This proposal aims to investigate novel inorganic-organic hybrid solid state electrolytes for use in solid state Li-ion batteries, mainly as catholyte in the composite cathode. Conceptionally, hybrid electrolytes can combine the advantages of crystalline electrolytes (high conductivity) with the advantages of polymer electrolytes (elasticity). A major challenge for such a concept is to provide high conductivity channels within the composite, related to bulk and interface properties of the two different component materials. Our approach is to combine polyelectrolytes with improved bulk properties and ceramic electrolyte particles with suitable morphology and surface chemistry to fabricate composites with high Li-ion conductivity and good mechanical properties. The surface chemistry of the ceramic electrolyte particles is thereby modified by ultra-thin coatings with the aim to improve the transport across (or along) ceramic-polymer interfaces. A major aim of the project is to establish the interrelation of interface structure and morphology with ion transport. In order to understand interface-related Li-ion transport phenomena, fundamental investigations towards interface formation and properties is performed by means of 2D model interfaces (layer stacks), which are characterized by surface science methods and electrochemical techniques.

基于锂离子技术的固态电池是高能量密度、安全稳定的存储设备的有希望的候选者。开发这种电池的主要问题是制造合适的复合阴极。需要材料和处理解决方案来提供具有高导电性的电极，以便最小化欧姆损耗以及提供弹性以补偿体积变化。此外，优选单离子电解质以避免极化效应。该提案旨在研究用于固态锂离子电池的新型无机-有机混合固态电解质，主要作为复合阴极中的阴极电解质。从概念上讲，混合电解质可以将结晶电解质的优点（高电导率）与聚合物电解质的优点（弹性）联合收割机结合起来。这种概念的主要挑战是在复合材料内提供与两种不同组分材料的本体和界面性质相关的高电导率通道。我们的方法是结合联合收割机聚电解质与改进的本体性能和陶瓷电解质颗粒具有合适的形态和表面化学，以制造复合材料具有高锂离子导电性和良好的机械性能。陶瓷电解质颗粒的表面化学由此通过超薄涂层改性，目的是改善穿过（或沿着）陶瓷-聚合物界面的传输。该项目的一个主要目的是建立界面结构和形态与离子传输的相互关系。为了理解界面相关的锂离子传输现象，通过2D模型界面（层堆叠）对界面形成和特性进行了基础研究，这些界面通过表面科学方法和电化学技术进行了表征。

项目成果

期刊论文数量（6）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Compositional Dependence of Li-Ion Conductivity in Garnet-Rich Composite Electrolytes for All-Solid-State Lithium-Ion Batteries-Toward Understanding the Drawbacks of Ceramic-Rich Composites.

DOI：
10.1021/acsami.1c05846
发表时间：
2021-06
期刊：
ACS applied materials & interfaces
影响因子：
9.5
作者：
A. I. Waidha;Thimo H Ferber;Manuel Donzelli;Niloofar Hosseinpourkahvaz;V. Vanita;Klaus Dirnberger;S. Ludwigs;R. Hausbrand;W. Jaegermann;O. Clemens
通讯作者：
A. I. Waidha;Thimo H Ferber;Manuel Donzelli;Niloofar Hosseinpourkahvaz;V. Vanita;Klaus Dirnberger;S. Ludwigs;R. Hausbrand;W. Jaegermann;O. Clemens

Interface reactivity of in-situ formed LiCoO2 - PEO solid-state interfaces investigated by X-ray photoelectron spectroscopy: Reaction products, energy level offsets and double layer formation