NANOscientific Community - Connect and Innovate in Nanoscience

overview

speakers

program

location

Back to List

Contributed Speaker

Dr. Ruediger Berger

Max Planck Institute for Polymer Research, Mainz, Germany

E-mail

berger@mpip-mainz.mpg.de

Lithium dendrite growth and space charge layers detected by operando KPFM measurements

Chao Zhu¹, Franjo Weber¹, Till Fuchs², Felix. H. Richter², Jürgen Janek², Rüdiger Berger¹

¹ Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany

² Institute of Physical Chemistry & Center for Materials Research, Justus-Liebig-University Gießen, Heinrich-Buff Ring 17, 35392 Giessen, Germany

The growth of lithium dendrites in inorganic solid electrolytes is an essential drawback that hinders the development of reliable all-solid-state lithium metal batteries. Generally, post mortem analysis of batteries show that grain boundaries in inorganic solid electrolytes are the preferential sites for lithium dendrite penetration. Operando Kelvin Probe Force Microscopy (KPFM) measurements elucidate the initial aspects of dendritic growth in a Li_6.25Al_0.25La₃Zr₂O₁₂ garnet-type solid electrolyte [1]. Strictly speaking solid electrolytes are mixed ionic-electronic conductors. In this case the measured contact potential difference (CPD) maps the internal electrostatic (Galvani) potential change during battery operation [2]. We find that the Galvani potential drops at grain boundaries near the lithium metal electrode during plating as a response to the accumulation of electrons. Based on these results, we propose a mechanistic model to explain the preferential growth of lithium dendrites and their penetration in inorganic solid electrolytes [1]. This example in the field of all solid state batteries illustrate that the method is versatile and benefitial for characterizing and understanding batteries and their components.

References:

[1] C. Zhu, T. Fuchs,S.A.L.Weber, F.H. Richter, G. Glasser, F. Weber., H.-J. Butt, J. Janek, R. Berger, Nature Communications 14, 1300 (2023).

[2] F. Weber, C. Zhu, S. Kobayashi, T. Fuchs, J. Janek, R. Berger, manuscript submitted.

Cookie categories	Purpose of cookie
Essential Cookies	To provide you with the Service you have requested. Without these cookies, Services that you have asked for cannot be provided. For example, essential cookies enable us to remember the items you place in the shopping basket so that you can order products.
Performance Cookies (Audience measurement)	Advertising CoTo analyze the use, performance and design of our Services, detect errors and improve user experience. For example, this type of cookie enables us to understand how often you are using our Services, to recognize that you have visited our websites before and to identify which parts of our Services and which sections of our website are most popular, for example by allowing us to see which pages visitors access most frequently and how much time visitors spend on each page.okies (Behavioral advertising)
Functional Cookies (Content customization)	To deliver a better user experience, and build up customer usage patterns and profiles. For example, this type of cookie ensures that the information displayed when you use our Services (e.g. on your next visit to our website) will match up with your user preferences (such as language preferences, font size or auto-fill options).
Advertising Cookies (Behavioral advertising)	To personalize our website, deliver customized advertisements to you, or contact you directly where you have separately consented to such communications, in a way which is relevant to you and which matches your interests by, for example, using information about products you have browsed or ordered on our website.