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DOI	10.1039/c8ee00907d
	Chemo-mechanical expansion of lithium electrode materials-on the route to mechanically optimized all-solid-state batteries
	Koerver R.; Zhang W.; De Biasi L.; Schweidler S.; Kondrakov A.O.; Kolling S.; Brezesinski T.; Hartmann P.; Zeier W.G.; Janek J.
发表日期	2018
ISSN	17545692
起始页码	2142
结束页码	2158
卷号	11 期号:8
英文摘要	Charge and discharge of lithium ion battery electrodes is accompanied by severe volume changes. In a confined space, the volume cannot expand, leading to significant pressures induced by local microstructural changes within the battery. While volume changes appear to be less critical in batteries with liquid electrolytes, they will be more critical in the case of lithium ion batteries with solid electrolytes and they will be even more critical and detrimental in the case of all-solid-state batteries with a lithium metal electrode. In this work we first summarize, compare, and analyze the volume changes occurring in state of the art electrode materials, based on crystallographic studies. A quantitative analysis follows that is based on the evaluation of the partial molar volume of lithium as a function of the degree of lithiation for different electrode materials. Second, the reaction volumes of operating full cells ("charge/discharge volumes") are experimentally determined from pressure-dependent open-circuit voltage measurements. The resulting changes in the open-circuit voltage are in the order of 1 mV/100 MPa, are well measurable, and agree with changes observed in the crystallographic data. Third, the pressure changes within solid-state batteries are approximated under the assumption of incompressibility, i.e. for constant volume of the cell casing, and are compared to experimental data obtained from model-type full cells. In addition to the understanding of the occurring volume changes of electrode materials and resulting pressure changes in solid-state batteries, we propose "mechanical" blending of electrode materials to achieve better cycling performance when aiming at "zero-strain" electrodes. © 2018 The Royal Society of Chemistry.
英文关键词	Blending; Electric discharges; Electrodes; Lithium-ion batteries; Open circuit voltage; Solid state devices; All-solid state batteries; Charge and discharge; Crystallographic data; Crystallographic studies; Mechanical expansion; Microstructural changes; Partial Molar volume; Solid state batteries; Solid electrolytes; crystallography; data set; electrode; electrolyte; equipment; fuel cell; lithium; measurement method; performance assessment; pressure effect; quantitative analysis
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/190169
作者单位	Institute of Physical Chemistry, Justus-Liebig-University Giessen, Heinrich-Buff-Ring 17, Giessen, 35392, Germany; Center for Materials Research (LaMa), Justus-Liebig-University Giessen, Heinrich-Buff-Ring 16, Giessen, 35392, Germany; Battery and Electrochemistry Laboratory (BELLA), Institute of Nanotechnology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz Platz 1, Eggenstein-Leopoldshafen, 76344, Germany; BASF SE, Ludwigshafen am Rhein, 67056, Germany; Institute of Mechanics and Materials, Technische Hochschule Mittelhessen, Wiesenstraße 14, Giessen, 35390, Germany
推荐引用方式 GB/T 7714	Koerver R.,Zhang W.,De Biasi L.,et al. Chemo-mechanical expansion of lithium electrode materials-on the route to mechanically optimized all-solid-state batteries[J],2018,11(8).
APA	Koerver R..,Zhang W..,De Biasi L..,Schweidler S..,Kondrakov A.O..,...&Janek J..(2018).Chemo-mechanical expansion of lithium electrode materials-on the route to mechanically optimized all-solid-state batteries.Energy & Environmental Science,11(8).
MLA	Koerver R.,et al."Chemo-mechanical expansion of lithium electrode materials-on the route to mechanically optimized all-solid-state batteries".Energy & Environmental Science 11.8(2018).