TY - JOUR

T1 - Electrophoretic Deposition of Out-of-Plane Oriented Active Material for Lithium-Ion Batteries

AU - Esper, Julian D.

AU - Helmer, Alexandra

AU - Wu, Yanlin

AU - Bachmann, Julien

AU - Klupp Taylor, Robin N.

N1 - Publisher Copyright: © 2021 The Authors. Energy Technology published by Wiley-VCH GmbH Copyright: Copyright 2021 Elsevier B.V., All rights reserved.

PY - 2021/4

Y1 - 2021/4

N2 - The performance of secondary batteries, of which the lithium-ion battery is one of the most well known, depends not only on the active electrode materials but also on the electrode architecture. In particular, the reduction in electrode tortuosity is expected to enable batteries with high active material utilization and fast charging and discharging capabilities. Herein, it is shown how electrophoretic deposition can be used to produce electrodes comprising hybrid particles of cobalt(II,III) oxide-coated rutile-mica oriented in an out-of-plane fashion. Key to this process is a sacrificial anode which leads to charging of the flake-shaped particles and formation of a holding layer cementing them perpendicular to the substrate. Moreover, the electrochemical performance of lithium-ion battery anodes with out-of-plane and in-plane oriented architectures is compared. The out-of-plane orientation of the flake-like particles results in better utilization of active material, lower charge-transfer impedance, and faster ion diffusion. Moreover, for a range of charge/discharge rates, the specific capacity is over three times higher in comparison to an electrode with the same material oriented in an in-plane architecture. The approach to electrode structuring is both facile and scalable and can be readily applied in the future to produce other electrochemical energy storage device electrodes.

AB - The performance of secondary batteries, of which the lithium-ion battery is one of the most well known, depends not only on the active electrode materials but also on the electrode architecture. In particular, the reduction in electrode tortuosity is expected to enable batteries with high active material utilization and fast charging and discharging capabilities. Herein, it is shown how electrophoretic deposition can be used to produce electrodes comprising hybrid particles of cobalt(II,III) oxide-coated rutile-mica oriented in an out-of-plane fashion. Key to this process is a sacrificial anode which leads to charging of the flake-shaped particles and formation of a holding layer cementing them perpendicular to the substrate. Moreover, the electrochemical performance of lithium-ion battery anodes with out-of-plane and in-plane oriented architectures is compared. The out-of-plane orientation of the flake-like particles results in better utilization of active material, lower charge-transfer impedance, and faster ion diffusion. Moreover, for a range of charge/discharge rates, the specific capacity is over three times higher in comparison to an electrode with the same material oriented in an in-plane architecture. The approach to electrode structuring is both facile and scalable and can be readily applied in the future to produce other electrochemical energy storage device electrodes.

KW - electrode architectures

KW - electrophoretic deposition

KW - flake-like hybrid particles

KW - lithium-ion batteries

KW - mica

UR - http://www.scopus.com/inward/record.url?scp=85100018269&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/5cf2359a-8f10-3d96-84e7-332adc009bfa/

U2 - 10.1002/ente.202000936

DO - 10.1002/ente.202000936

M3 - Article

AN - SCOPUS:85100018269

VL - 9

JO - Energy Technology

JF - Energy Technology

SN - 2194-4288

IS - 4

M1 - 2000936

ER -