Shape-anisotropic cobalt-germanium-borate glass flakes as novel Li-ion battery anodes

Esper JD, Zhuo Y, Barr M, Yokosawa T, Spiecker E, de Ligny D, Bachmann J, Peukert W, Romeis S (2020)

Publication Language: English

Publication Type: Journal article, Original article

Publication year: 2020

Journal

Powder Technology Elsevier

Book Volume: 363

Pages Range: 218-231

DOI: 10.1016/j.powtec.2019.11.063

Abstract

Novel CoO-Li2O-B2O3 and CoO-GeO2-Li2O-B2O3 flake-like glass particles for battery applications are produced by an innovative technique: Glasses from melt quenching are processed into micron-sized glass flakes in a stirred media mill. Processing under well-controlled conditions yields flake-like particles with high aspect ratios which are suitable for anodes in Lithium-ion batteries. Electrochemical characterization by cyclic voltammetry, electrochemical impedance spectroscopy, galvanostatic charge/discharge cycles and rate capability measurements indicates that the flakes show superior electrochemical properties compared to the bulk glass counterparts with a stable specific capacity of 620 mAh g−1 after 100 cycles. The majority of charge is stored by Li+ ion diffusion inside the material and impedance spectroscopy shows enhanced lithium ion diffusion capabilities of the flakes. The proposed fabrication process is performed under ambient conditions and is simple, cost-efficient, fully scalable and can be easily transferred to other glass compositions with electrochemically active metal oxides.

Authors with CRIS profile

Julian Duane Esper Lehrstuhl für Interfaces und Partikeltechnologie (LFG) Ying Zhuo Lehrstuhl für Chemistry of thin film materials Maissa Barr Lehrstuhl für Chemistry of thin film materials Tadahiro Yokosawa Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Erdmann Spiecker Dominique de Ligny Professur für Werkstoffwissenschaften (Glas und Keramik) Julien Bachmann Lehrstuhl für Chemistry of thin film materials Wolfgang Peukert Lehrstuhl für Interfaces und Partikeltechnologie (LFG) Stefan Romeis Lehrstuhl für Interfaces und Partikeltechnologie (LFG)

Additional Organisation(s)

Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM) Graduiertenkolleg 1896/2 In situ Mikroskopie mit Elektronen, Röntgenstrahlen und Rastersonden

Utilized Equipment

FEI Titan Themis 300 (FEI) Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)

Related research project(s)

Formsteuerung von Partikeln in einer Rührwerkskugelmühle May 1, 2021 - April 30, 2024 In-situ Characterization of Nanomaterials with Electrons, X-rays/Neutrons and Scanning Probes (GRK 1896) Oct. 1, 2013 - Sept. 30, 2022

How to cite

APA:

Esper, J.D., Zhuo, Y., Barr, M., Yokosawa, T., Spiecker, E., de Ligny, D.,... Romeis, S. (2020). Shape-anisotropic cobalt-germanium-borate glass flakes as novel Li-ion battery anodes. Powder Technology, 363, 218-231. https://doi.org/10.1016/j.powtec.2019.11.063

MLA:

Esper, Julian Duane, et al. "Shape-anisotropic cobalt-germanium-borate glass flakes as novel Li-ion battery anodes." Powder Technology 363 (2020): 218-231.

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