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

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

Additional Organisation(s)

Related research project(s)

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://dx.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.

BibTeX: Download