Single “Swiss-roll” microelectrode elucidates the critical role of iron substitution in conversion-type oxides

verfasst von

Lixiang Liu, Shaozhuan Huang, Wujun Shi, Xiaolei Sun, Jinbo Pang, Qiongqiong Lu, Ye Yang, Lixia Xi, Liang Deng, Steffen Oswald, Yin Yin, Lifeng Liu, Libo Ma, Oliver G. Schmidt, Yumeng Shi, Lin Zhang

Abstract

Advancing the lithium-ion battery technology requires the understanding of electrochemical processes in electrode materials with high resolution, accuracy, and sensitivity. However, most techniques today are limited by their inability to separate the complex signals from slurry-coated composite electrodes. Here, we use a three-dimensional “Swiss-roll” microtubular electrode that is incorporated into a micrometer-sized lithium battery. This on-chip platform combines various in situ characterization techniques and precisely probes the intrinsic electrochemical properties of each active material due to the removal of unnecessary binders and additives. As an example, it helps elucidate the critical role of Fe substitution in a conversion-type NiO electrode by monitoring the evolution of Fe₂O₃ and solid electrolyte interphase layer. The markedly enhanced electrode performances are therefore explained. Our approach exposes a hitherto unexplored route to tracking the phase, morphology, and electrochemical evolution of electrodes in real time, allowing us to reveal information that is not accessible with bulk-level characterization techniques.

Organisationseinheit(en)

Institut für Festkörperphysik

Externe Organisation(en)

Shenzhen University
Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden (IFW) e.V.
Technische Universität Chemnitz
Ministry of Education of the People's Republic of China (MOE)
ShanghaiTech University
Nankai University
Technische Universität Dresden
International Iberian Nanotechnology Laboratory

Typ

Artikel

Journal

Science advances

Band

8

Anzahl der Seiten

11

ISSN

2375-2548

Publikationsdatum

12.2022

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Allgemein

Ziele für nachhaltige Entwicklung

SDG 7 – Erschwingliche und saubere Energie

Elektronische Version(en)

https://doi.org/10.1126/sciadv.add6596 (Zugang: Offen)
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9770940/ (Zugang: Offen)