Al2O3/TiO2 coated separators: Roll-to-roll processing and implications for improved battery safety and performance

Dhrupad Parikh; Charl J. Jafta; Bishnu P. Thapaliya; Jaswinder Sharma; Harry M. Meyer; Chris Silkowski; Jianlin Li

doi:10.1016/j.jpowsour.2021.230259

Al₂O₃/TiO₂ coated separators: Roll-to-roll processing and implications for improved battery safety and performance

Dhrupad Parikh, Charl J. Jafta, Bishnu P. Thapaliya, Jaswinder Sharma, Harry M. Meyer, Chris Silkowski, Jianlin Li

Research output: Contribution to journal › Article › peer-review

51 Scopus citations

Abstract

Heat generation is one of the major concerns with lithium-ion batteries (LIBs) while charging them at higher currents, which could inadvertently impact the rate performance and battery safety. Polymer separator is one of the least thermal conductive components of a LIB. In addition, commercial separators for LIBs are made from polyolefin membranes that tend to shrink and curl at higher temperatures due to lower melting temperature (~130 °C), which increases the risk of internal short circuiting. Developing separators with improved thermal stability and higher electrolyte uptake is essential for enhancing safety as well as performance of LIBs. In this work, thin layer of ceramic coatings (Al₂O₃ and TiO₂) are applied on a propylene membrane to improve thermal stability and electrolyte affinity without compromising rate performance. A slurry with 100% Al₂O₃ coated on the polypropylene separator exhibited the best improvement in thermal stability (shrinkage of 0.6% vs 6.0% for uncoated membrane) and excellent rate performance with 92% capacity retention at 2C. The Al₂O₃ coated separator demonstrated excellent electrolyte wettability compared to the uncoated. The cross-plane thermal-conductivity of the ceramic coated separators is analyzed to understand heat transfer behavior. The thermal-conductivity of the separator is improved by ~3.2 times with the Al₂O₃ coating.

Original language	English
Article number	230259
Journal	Journal of Power Sources
Volume	507
DOIs	https://doi.org/10.1016/j.jpowsour.2021.230259
State	Published - Sep 30 2021

Funding

This manuscript has been authored in part by UT-Battelle, LLC, under contract DE-AC05-00OR22725 with the US Department of Energy (DOE). The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes. DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan ( http://energy.gov/downloads/doe-public-access-plan ). This research at Oak Ridge National Laboratory, managed by UT Battelle, LLC, for the U.S. Department of Energy (DOE) under contract DE-AC05-00OR22725, was sponsored by the Office of Energy Efficiency and Renewable Energy (EERE) Ad-vanced Manufacturing Office (AMO) .

Keywords

AlO and TiO
Ceramic coated separators
Roll-to-roll processing
Thermal conductivity
Thermal stability

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.jpowsour.2021.230259

Cite this

@article{ac07868455a844df98ef56fccdb0bbd3,

title = "Al2O3/TiO2 coated separators: Roll-to-roll processing and implications for improved battery safety and performance",

abstract = "Heat generation is one of the major concerns with lithium-ion batteries (LIBs) while charging them at higher currents, which could inadvertently impact the rate performance and battery safety. Polymer separator is one of the least thermal conductive components of a LIB. In addition, commercial separators for LIBs are made from polyolefin membranes that tend to shrink and curl at higher temperatures due to lower melting temperature (~130 °C), which increases the risk of internal short circuiting. Developing separators with improved thermal stability and higher electrolyte uptake is essential for enhancing safety as well as performance of LIBs. In this work, thin layer of ceramic coatings (Al2O3 and TiO2) are applied on a propylene membrane to improve thermal stability and electrolyte affinity without compromising rate performance. A slurry with 100% Al2O3 coated on the polypropylene separator exhibited the best improvement in thermal stability (shrinkage of 0.6% vs 6.0% for uncoated membrane) and excellent rate performance with 92% capacity retention at 2C. The Al2O3 coated separator demonstrated excellent electrolyte wettability compared to the uncoated. The cross-plane thermal-conductivity of the ceramic coated separators is analyzed to understand heat transfer behavior. The thermal-conductivity of the separator is improved by ~3.2 times with the Al2O3 coating.",

keywords = "AlO and TiO, Ceramic coated separators, Roll-to-roll processing, Thermal conductivity, Thermal stability",

author = "Dhrupad Parikh and Jafta, {Charl J.} and Thapaliya, {Bishnu P.} and Jaswinder Sharma and Meyer, {Harry M.} and Chris Silkowski and Jianlin Li",

note = "Publisher Copyright: {\textcopyright} 2021 Elsevier B.V.",

year = "2021",

month = sep,

day = "30",

doi = "10.1016/j.jpowsour.2021.230259",

language = "English",

volume = "507",

journal = "Journal of Power Sources",

issn = "0378-7753",

publisher = "Elsevier",

}

TY - JOUR

T1 - Al2O3/TiO2 coated separators

T2 - Roll-to-roll processing and implications for improved battery safety and performance

AU - Parikh, Dhrupad

AU - Jafta, Charl J.

AU - Thapaliya, Bishnu P.

AU - Sharma, Jaswinder

AU - Meyer, Harry M.

AU - Silkowski, Chris

AU - Li, Jianlin

PY - 2021/9/30

Y1 - 2021/9/30

N2 - Heat generation is one of the major concerns with lithium-ion batteries (LIBs) while charging them at higher currents, which could inadvertently impact the rate performance and battery safety. Polymer separator is one of the least thermal conductive components of a LIB. In addition, commercial separators for LIBs are made from polyolefin membranes that tend to shrink and curl at higher temperatures due to lower melting temperature (~130 °C), which increases the risk of internal short circuiting. Developing separators with improved thermal stability and higher electrolyte uptake is essential for enhancing safety as well as performance of LIBs. In this work, thin layer of ceramic coatings (Al2O3 and TiO2) are applied on a propylene membrane to improve thermal stability and electrolyte affinity without compromising rate performance. A slurry with 100% Al2O3 coated on the polypropylene separator exhibited the best improvement in thermal stability (shrinkage of 0.6% vs 6.0% for uncoated membrane) and excellent rate performance with 92% capacity retention at 2C. The Al2O3 coated separator demonstrated excellent electrolyte wettability compared to the uncoated. The cross-plane thermal-conductivity of the ceramic coated separators is analyzed to understand heat transfer behavior. The thermal-conductivity of the separator is improved by ~3.2 times with the Al2O3 coating.

AB - Heat generation is one of the major concerns with lithium-ion batteries (LIBs) while charging them at higher currents, which could inadvertently impact the rate performance and battery safety. Polymer separator is one of the least thermal conductive components of a LIB. In addition, commercial separators for LIBs are made from polyolefin membranes that tend to shrink and curl at higher temperatures due to lower melting temperature (~130 °C), which increases the risk of internal short circuiting. Developing separators with improved thermal stability and higher electrolyte uptake is essential for enhancing safety as well as performance of LIBs. In this work, thin layer of ceramic coatings (Al2O3 and TiO2) are applied on a propylene membrane to improve thermal stability and electrolyte affinity without compromising rate performance. A slurry with 100% Al2O3 coated on the polypropylene separator exhibited the best improvement in thermal stability (shrinkage of 0.6% vs 6.0% for uncoated membrane) and excellent rate performance with 92% capacity retention at 2C. The Al2O3 coated separator demonstrated excellent electrolyte wettability compared to the uncoated. The cross-plane thermal-conductivity of the ceramic coated separators is analyzed to understand heat transfer behavior. The thermal-conductivity of the separator is improved by ~3.2 times with the Al2O3 coating.

KW - AlO and TiO

KW - Ceramic coated separators

KW - Roll-to-roll processing

KW - Thermal conductivity

KW - Thermal stability

UR - http://www.scopus.com/inward/record.url?scp=85110257372&partnerID=8YFLogxK

U2 - 10.1016/j.jpowsour.2021.230259

DO - 10.1016/j.jpowsour.2021.230259

M3 - Article

AN - SCOPUS:85110257372

SN - 0378-7753

VL - 507

JO - Journal of Power Sources

JF - Journal of Power Sources

M1 - 230259

ER -