Helmer A, Rink A, Esper JD, Wu Y, Bachmann J, Klupp Taylor R (2019)
Publication Type: Journal article, Original article
Publication year: 2019
Book Volume: 30
Pages Range: 3127-3134
Journal Issue: 12
URI: https://www.sciencedirect.com/science/article/pii/S0921883119303243
DOI: 10.1016/j.apt.2019.09.020
Abstract
We describe the
fabrication and morphological and electrochemical characterisation of lithium
ion battery anodes whereby the active material is supported on flake-like microparticles.
Using various physical analytical techniques we verify that nanostructured
cobalt (II, III) oxide can be directly grown onto commercial titanium
dioxide-coated mica flakes by a liquid phase oxidation route. We then
investigate the formulation and deposition of this material along with carbon
black in order to form electrodes. Here we consider two binder/solvent systems,
one widely used based on polyvinylidene fluoride in N-methy-2-pyrrolidone, and
one more recently identified based on sodium alginate in water. We show that
the latter system is preferable for the formation of anodes using the cobalt
oxide coated flake-like particles as it leads to a more homogeneous
distribution of active and conductive material in the electrode. Using cyclic
voltammetry and electrochemical impedance spectroscopy we show that this
feature improves the access to active material and facilitates efficient charge
transfer in the electrode while maintaining electrode integrity. Moreover, an electrode
based on the alginate binder exhibited a high reversible specific capacity of
650 mAh/g along with 84.8% capacity retention after 70 cycles. Overall our
study indicates the promise of including shape anisotropic particles such as
microflakes in battery electrodes.
APA:
Helmer, A., Rink, A., Esper, J.D., Wu, Y., Bachmann, J., & Klupp Taylor, R. (2019). Preparation, formulation and deposition of mica flake supported cobalt oxide for nanostructured lithium ion battery anodes. Advanced Powder Technology, 30(12), 3127-3134. https://doi.org/10.1016/j.apt.2019.09.020
MLA:
Helmer, Alexandra, et al. "Preparation, formulation and deposition of mica flake supported cobalt oxide for nanostructured lithium ion battery anodes." Advanced Powder Technology 30.12 (2019): 3127-3134.
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