Microstructural design of printed graphite electrodes for lithium-ion batteries

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Microstructural design of printed graphite electrodes for lithium-ion batteries. / Gastol, Dominika; Capener, Matthew; Reynolds, Carl; Constable, Christopher; Kendrick, Emma.

In: Materials and Design, Vol. 205, 109720, 07.2021.

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@article{f72ca0cc5f2546e09c7dccabd17d5bba,
title = "Microstructural design of printed graphite electrodes for lithium-ion batteries",
abstract = "Performance properties of lithium-ion battery electrodes; capacity, rate and lifetime, are determined by the design of the coating composite microstructure. The internal pore structure and electronic networks for high coat weight graphite electrodes are manipulated through changes in the ink rheological properties, and through an syringe dispensing printing process. The rheological properties of a water-based, high viscosity graphite ink were optimised using a secondary solvent for the rheological requirements of a syringe dispensing method. The microstructure of high coat-weight battery electrodes produced from printing and tape cast methods were compared and the electrochemical performance evaluated. Cross sectional analysis of the slurry cast coatings showed improved component homogeneity, lower graphite alignment with 0.1% to 10% weight increase of the secondary solvent, with a corresponding change in tortuosity of the electrodes of 5.3–2.8. Improved cycle life is observed with a printed electrode containing an embedded electrolyte channel. Performance properties were elucidated through charge discharge, GITT and PEIS measurements. Improved electronic conductivities, exchange currents and diffusion coefficients were observed for the syringe deposited electrode. This digital deposition process for manufacturing electrodes shows promise for further optimisation of electrodes for long-life, high energy density batteries.",
keywords = "Additive manufacturing, Electrode, Graphite, Lithium-ion, Tortuosity",
author = "Dominika Gastol and Matthew Capener and Carl Reynolds and Christopher Constable and Emma Kendrick",
note = "Funding Information: Authors would like to acknowledge Innovate UK Spraycoat Project 133364, and KWSP who designed and manufactured the digital deposition equipment. Also, Faraday Institution project (faraday.ac.uk; EP/S003053/1, FIRG015). Publisher Copyright: {\textcopyright} 2021 The Authors",
year = "2021",
month = jul,
doi = "10.1016/j.matdes.2021.109720",
language = "English",
volume = "205",
journal = "Materials and Design",
issn = "0264-1275",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Microstructural design of printed graphite electrodes for lithium-ion batteries

AU - Gastol, Dominika

AU - Capener, Matthew

AU - Reynolds, Carl

AU - Constable, Christopher

AU - Kendrick, Emma

N1 - Funding Information: Authors would like to acknowledge Innovate UK Spraycoat Project 133364, and KWSP who designed and manufactured the digital deposition equipment. Also, Faraday Institution project (faraday.ac.uk; EP/S003053/1, FIRG015). Publisher Copyright: © 2021 The Authors

PY - 2021/7

Y1 - 2021/7

N2 - Performance properties of lithium-ion battery electrodes; capacity, rate and lifetime, are determined by the design of the coating composite microstructure. The internal pore structure and electronic networks for high coat weight graphite electrodes are manipulated through changes in the ink rheological properties, and through an syringe dispensing printing process. The rheological properties of a water-based, high viscosity graphite ink were optimised using a secondary solvent for the rheological requirements of a syringe dispensing method. The microstructure of high coat-weight battery electrodes produced from printing and tape cast methods were compared and the electrochemical performance evaluated. Cross sectional analysis of the slurry cast coatings showed improved component homogeneity, lower graphite alignment with 0.1% to 10% weight increase of the secondary solvent, with a corresponding change in tortuosity of the electrodes of 5.3–2.8. Improved cycle life is observed with a printed electrode containing an embedded electrolyte channel. Performance properties were elucidated through charge discharge, GITT and PEIS measurements. Improved electronic conductivities, exchange currents and diffusion coefficients were observed for the syringe deposited electrode. This digital deposition process for manufacturing electrodes shows promise for further optimisation of electrodes for long-life, high energy density batteries.

AB - Performance properties of lithium-ion battery electrodes; capacity, rate and lifetime, are determined by the design of the coating composite microstructure. The internal pore structure and electronic networks for high coat weight graphite electrodes are manipulated through changes in the ink rheological properties, and through an syringe dispensing printing process. The rheological properties of a water-based, high viscosity graphite ink were optimised using a secondary solvent for the rheological requirements of a syringe dispensing method. The microstructure of high coat-weight battery electrodes produced from printing and tape cast methods were compared and the electrochemical performance evaluated. Cross sectional analysis of the slurry cast coatings showed improved component homogeneity, lower graphite alignment with 0.1% to 10% weight increase of the secondary solvent, with a corresponding change in tortuosity of the electrodes of 5.3–2.8. Improved cycle life is observed with a printed electrode containing an embedded electrolyte channel. Performance properties were elucidated through charge discharge, GITT and PEIS measurements. Improved electronic conductivities, exchange currents and diffusion coefficients were observed for the syringe deposited electrode. This digital deposition process for manufacturing electrodes shows promise for further optimisation of electrodes for long-life, high energy density batteries.

KW - Additive manufacturing

KW - Electrode

KW - Graphite

KW - Lithium-ion

KW - Tortuosity

UR - http://www.scopus.com/inward/record.url?scp=85104375848&partnerID=8YFLogxK

U2 - 10.1016/j.matdes.2021.109720

DO - 10.1016/j.matdes.2021.109720

M3 - Article

AN - SCOPUS:85104375848

VL - 205

JO - Materials and Design

JF - Materials and Design

SN - 0264-1275

M1 - 109720

ER -