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Building Efficient Ion Pathway in Highly Densified Thick Electrodes with High Gravimetric and Volumetric Energy Densities.
Wu, Jingyi; Ju, Zhengyu; Zhang, Xiao; Takeuchi, Kenneth J; Marschilok, Amy C; Takeuchi, Esther S; Yu, Guihua.
Afiliación
  • Wu J; Materials Science and Engineering Program, Texas Materials Institute, The University of Texas at Austin, Austin, Texas 78712, United States.
  • Ju Z; Materials Science and Engineering Program, Texas Materials Institute, The University of Texas at Austin, Austin, Texas 78712, United States.
  • Zhang X; Materials Science and Engineering Program, Texas Materials Institute, The University of Texas at Austin, Austin, Texas 78712, United States.
  • Takeuchi KJ; Department of Chemistry and Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States.
  • Marschilok AC; Interdisciplinary Science Department, Energy and Photon Sciences Directorate, Brookhaven National Laboratory, Upton, New York 11973, United States.
  • Takeuchi ES; Department of Chemistry and Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States.
  • Yu G; Interdisciplinary Science Department, Energy and Photon Sciences Directorate, Brookhaven National Laboratory, Upton, New York 11973, United States.
Nano Lett ; 21(21): 9339-9346, 2021 Nov 10.
Article en En | MEDLINE | ID: mdl-34669404
A common practice in thick electrode design is to increase porosity to boost charge transport kinetics. However, a high porosity offsets the advantages of thick electrodes in both gravimetric and volumetric energy densities. Here we design a freestanding thick electrode composed of highly densified active material regions connected by continuous electrolyte-buffering voids. By wet calendering of the phase-inversion electrode, the continuous compact active material region and continuous ion transport network are controllably formed. Rate capabilities and cycling stability at high LiFePO4 loading of 126 mg cm-2 were achieved for the densified cathode with porosity as low as 38%. The decreased porosity and efficient void utilization enable high gravimetric/volumetric energy densities of 330 Wh kg-1 and 614 Wh L-1, as well as improved power densities. The versatility of this method and the industrial compatible "roll-to-roll" fabrication demonstrate an important step toward the practical application of thick electrodes.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nano Lett Año: 2021 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Nano Lett Año: 2021 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos