Cold sintering process for fabrication of a high volumetric capacity Li4Ti5O12 anode

Joo Hwan Seo, Kris Verlinde, Ramakrishnan Rajagopalan, Enrique D. Gomez, Thomas E. Mallouk, Clive A. Randall

Research output: Contribution to journalArticle

Abstract

The cold sintering process (CSP) is useful for densifying lithium ion battery composite electrodes to achieve higher volumetric capacity density. Lithium titanate is one of the most promising anode materials to replace graphite in conventional anodes, as it enhances safety in large scale applications. A densified binder-free LTO based anode was fabricated by the cold sintering process. The composite anode was first formed by tape casting with a binder and then was heat treated to remove the binder. The binder-free composite was humidified with water to provide a transient liquid phase and then moved onto a current collector. The wetted composite was cold sintered at 120 °C under a uniaxial pressure of 500 MPa and directly deposited on a current collector. The density of the LTO/CNF composite anode was 2.82 g/cm3 (87% relative density). The volumetric capacity densities of the cold sintered anodes were found to be ~380 mAh/cm3.

Original languageEnglish (US)
Article number114435
JournalMaterials Science and Engineering B: Solid-State Materials for Advanced Technology
Volume250
DOIs
StatePublished - Nov 2019

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sintering
Anodes
anodes
Sintering
Fabrication
fabrication
Binders
composite materials
Composite materials
accumulators
lithium
Graphite
Lithium
Tapes
tapes
electric batteries
safety
Casting
liquid phases
graphite

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

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title = "Cold sintering process for fabrication of a high volumetric capacity Li4Ti5O12 anode",
abstract = "The cold sintering process (CSP) is useful for densifying lithium ion battery composite electrodes to achieve higher volumetric capacity density. Lithium titanate is one of the most promising anode materials to replace graphite in conventional anodes, as it enhances safety in large scale applications. A densified binder-free LTO based anode was fabricated by the cold sintering process. The composite anode was first formed by tape casting with a binder and then was heat treated to remove the binder. The binder-free composite was humidified with water to provide a transient liquid phase and then moved onto a current collector. The wetted composite was cold sintered at 120 °C under a uniaxial pressure of 500 MPa and directly deposited on a current collector. The density of the LTO/CNF composite anode was 2.82 g/cm3 (87{\%} relative density). The volumetric capacity densities of the cold sintered anodes were found to be ~380 mAh/cm3.",
author = "Seo, {Joo Hwan} and Kris Verlinde and Ramakrishnan Rajagopalan and Gomez, {Enrique D.} and Mallouk, {Thomas E.} and Randall, {Clive A.}",
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T1 - Cold sintering process for fabrication of a high volumetric capacity Li4Ti5O12 anode

AU - Seo, Joo Hwan

AU - Verlinde, Kris

AU - Rajagopalan, Ramakrishnan

AU - Gomez, Enrique D.

AU - Mallouk, Thomas E.

AU - Randall, Clive A.

PY - 2019/11

Y1 - 2019/11

N2 - The cold sintering process (CSP) is useful for densifying lithium ion battery composite electrodes to achieve higher volumetric capacity density. Lithium titanate is one of the most promising anode materials to replace graphite in conventional anodes, as it enhances safety in large scale applications. A densified binder-free LTO based anode was fabricated by the cold sintering process. The composite anode was first formed by tape casting with a binder and then was heat treated to remove the binder. The binder-free composite was humidified with water to provide a transient liquid phase and then moved onto a current collector. The wetted composite was cold sintered at 120 °C under a uniaxial pressure of 500 MPa and directly deposited on a current collector. The density of the LTO/CNF composite anode was 2.82 g/cm3 (87% relative density). The volumetric capacity densities of the cold sintered anodes were found to be ~380 mAh/cm3.

AB - The cold sintering process (CSP) is useful for densifying lithium ion battery composite electrodes to achieve higher volumetric capacity density. Lithium titanate is one of the most promising anode materials to replace graphite in conventional anodes, as it enhances safety in large scale applications. A densified binder-free LTO based anode was fabricated by the cold sintering process. The composite anode was first formed by tape casting with a binder and then was heat treated to remove the binder. The binder-free composite was humidified with water to provide a transient liquid phase and then moved onto a current collector. The wetted composite was cold sintered at 120 °C under a uniaxial pressure of 500 MPa and directly deposited on a current collector. The density of the LTO/CNF composite anode was 2.82 g/cm3 (87% relative density). The volumetric capacity densities of the cold sintered anodes were found to be ~380 mAh/cm3.

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