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Title: Thick Co-Extruded Cathode Electrodes for High Energy Lithium-Ion Batteries

Abstract

Co-Extrusion (CoEx) is a high speed, scalable deposition process for creating finely patterned, interdigitated thick films. Our CoEx printhead is designed to be a drop-in replacement for slot-die heads on web coaters, enabling novel geometric structuring of electrodes with minor changes to existing battery electrode processing lines. Here, we present the use of CoEx to prepare thick (~ 120 µm) NMC cathode electrodes consisting of alternating regions of high lithium-ion transport and high lithium-ion storage capacity. By structuring the cathode electrode, we enable full lithium utilization at C/2, despite near doubling of the electrode thickness compared to conventional baseline electrodes. CoEx cathode electrodes are paired with thick, graded graphite anode electrodes and assembled into 1 Ah pouch cells for electrochemical testing. CoEx pouch cells demonstrate 10 – 20% improved energy density with respect to conventional electrodes and > 30% improved power density with respect to thick conventional (unstructured) electrodes at high discharge rates,

Authors:
ORCiD logo [1];  [1];  [1];  [2]; ORCiD logo [2];  [1]; ORCiD logo [2]
  1. Palo Alto Research Center
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Palo Alto Research Center
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
Contributing Org.:
Ford Motor Company
OSTI Identifier:
1484502
Report Number(s):
DOE-PARC-07303-2
DOE Contract Number:  
EE0007303
Resource Type:
Conference
Resource Relation:
Conference: 2018 MRS Fall Meeting & Exhibit; Boston, MA; November 25-30, 2018
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; 42 ENGINEERING; batteries; lithium-ion; processing; cathode; battery manufacturing

Citation Formats

Rao, Ranjeet, Solberg, Scott, Murphy, Kathryn, Wood, Marissa, Li, Jianlin, Pandey, Rahul, and Wood, David. Thick Co-Extruded Cathode Electrodes for High Energy Lithium-Ion Batteries. United States: N. p., 2018. Web.
Rao, Ranjeet, Solberg, Scott, Murphy, Kathryn, Wood, Marissa, Li, Jianlin, Pandey, Rahul, & Wood, David. Thick Co-Extruded Cathode Electrodes for High Energy Lithium-Ion Batteries. United States.
Rao, Ranjeet, Solberg, Scott, Murphy, Kathryn, Wood, Marissa, Li, Jianlin, Pandey, Rahul, and Wood, David. Tue . "Thick Co-Extruded Cathode Electrodes for High Energy Lithium-Ion Batteries". United States. https://www.osti.gov/servlets/purl/1484502.
@article{osti_1484502,
title = {Thick Co-Extruded Cathode Electrodes for High Energy Lithium-Ion Batteries},
author = {Rao, Ranjeet and Solberg, Scott and Murphy, Kathryn and Wood, Marissa and Li, Jianlin and Pandey, Rahul and Wood, David},
abstractNote = {Co-Extrusion (CoEx) is a high speed, scalable deposition process for creating finely patterned, interdigitated thick films. Our CoEx printhead is designed to be a drop-in replacement for slot-die heads on web coaters, enabling novel geometric structuring of electrodes with minor changes to existing battery electrode processing lines. Here, we present the use of CoEx to prepare thick (~ 120 µm) NMC cathode electrodes consisting of alternating regions of high lithium-ion transport and high lithium-ion storage capacity. By structuring the cathode electrode, we enable full lithium utilization at C/2, despite near doubling of the electrode thickness compared to conventional baseline electrodes. CoEx cathode electrodes are paired with thick, graded graphite anode electrodes and assembled into 1 Ah pouch cells for electrochemical testing. CoEx pouch cells demonstrate 10 – 20% improved energy density with respect to conventional electrodes and > 30% improved power density with respect to thick conventional (unstructured) electrodes at high discharge rates,},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {11}
}

Conference:
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