Research output: Contribution to journal › Article › peer-review
Shape-anisotropic cobalt-germanium-borate glass flakes as novel Li-ion battery anodes. / Esper, Julian D.; Zhuo, Ying; Barr, Maïssa K.S.; Yokosawa, Tadahiro; Spiecker, Erdmann; de Ligny, Dominique; Bachmann, Julien; Peukert, Wolfgang; Romeis, Stefan.
In: Powder Technology, Vol. 363, 01.03.2020, p. 218-231.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Shape-anisotropic cobalt-germanium-borate glass flakes as novel Li-ion battery anodes
AU - Esper, Julian D.
AU - Zhuo, Ying
AU - Barr, Maïssa K.S.
AU - Yokosawa, Tadahiro
AU - Spiecker, Erdmann
AU - de Ligny, Dominique
AU - Bachmann, Julien
AU - Peukert, Wolfgang
AU - Romeis, Stefan
N1 - Funding Information: The authors thank Dr. Jochen Schmidt for performing the ICP OES measurements. Jakob Iser and Milena Stephan are acknowledged for assisting with lab work and sample preparation. SR acknowledges German Research Foundation (DFG) for providing funding through the starting grant of GRK1896 “In situ Microscopy with Electrons, X-rays and Scanning Probes”. Appendix A Publisher Copyright: © 2019 Elsevier B.V. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/3/1
Y1 - 2020/3/1
N2 - 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.
AB - 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.
KW - Anode
KW - Glasses
KW - Lithium-ion battery
KW - Particle design
KW - Shape-anisotropy
KW - STORAGE
KW - OXIDE
KW - CATHODES
KW - PERFORMANCE
KW - CARBON NANOTUBES
KW - RECHARGEABLE LITHIUM
KW - NANOPARTICLES
KW - CO3O4
KW - RATE CAPABILITY
KW - HIGH-CAPACITY
UR - http://www.scopus.com/inward/record.url?scp=85077942458&partnerID=8YFLogxK
U2 - 10.1016/j.powtec.2019.11.063
DO - 10.1016/j.powtec.2019.11.063
M3 - Article
AN - SCOPUS:85077942458
VL - 363
SP - 218
EP - 231
JO - Powder Technology
JF - Powder Technology
SN - 0032-5910
ER -
ID: 70657800