Journal article
Percolation Characteristics of Conductive Additives for Capacitive Flowable (Semi-Solid) Electrodes
ACS applied materials & interfaces, v 12(5), pp 5866-5875
05 Feb 2020
PMID: 31922388
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Understanding the percolation characteristics of multicomponent conducting suspensions is critical for the development of flowable (semi-solid) electrochemical systems for energy storage and capacitive deionization with optimal electrochemical and rheological performance. Despite its significance, not much is known about the impact of the selected particle morphology on the agglomeration kinetics and the state of dispersion in flowable electrodes. In this study, the impact of the conductive additive morphology on the electrochemical and rheological response of capacitive flowable electrodes has been systematically investigated. Critical viscosity limits have been determined for common carbon additives that offer slurry formulations with improved electrochemical and rheological performance. For instance, at the same electrical conductivity of 60 mS cm
, higher aspect ratio particles, such as graphene and carbon nanotubes, offered 4 and 2.4 times lower viscosity compared to carbon black due to the improved packing and conformity of the high aspect ratio particles. On the other hand, thixotropic measurements showed that the flowable electrodes with carbon black exhibit the fastest agglomeration kinetics, offering 25 % less time to recover from the applied shear due to spherical morphology and facile agglomeration kinetics. Overall, our findings show that the particle morphology has a significant impact on the electrochemical and rheological performance of flowable electrodes with up to 40 % difference in capacitance for similar viscosity suspensions. Furthermore, a direct correlation between the rheological and the electrochemical properties was established, offering morphology-independent practical guidelines for formulating slurries with optimal performance. In this manner, particles that can achieve the highest density of packing before the critical limit were found to offer the optimal balance between electrochemical and rheological performance.
Metrics
Details
- Title
- Percolation Characteristics of Conductive Additives for Capacitive Flowable (Semi-Solid) Electrodes
- Creators
- Bilen Akuzum - A. J. Drexel Nanomaterials Institute and Department of Materials Science and Engineering , Drexel University , Philadelphia , Pennsylvania 19104 United StatesPushpendra Singh - Center of Nanotechnology , Indian Institute of Technology, Roorkee , Roorkee 247667 , IndiaDevon A Eichfeld - Department of Mechanical Engineering , Pennsylvania State University , University Park , Pennsylvania 16802 , United StatesLutfi Agartan - Electrochemical Energy Systems Laboratory Department of Mechanical Engineering and Mechanics , Drexel University , Philadelphia , Pennsylvania 19104 , United StatesSimge Uzun - A. J. Drexel Nanomaterials Institute and Department of Materials Science and Engineering , Drexel University , Philadelphia , Pennsylvania 19104 United StatesYury Gogotsi - A. J. Drexel Nanomaterials Institute and Department of Materials Science and Engineering , Drexel University , Philadelphia , Pennsylvania 19104 United StatesE Caglan Kumbur - Electrochemical Energy Systems Laboratory Department of Mechanical Engineering and Mechanics , Drexel University , Philadelphia , Pennsylvania 19104 , United States
- Publication Details
- ACS applied materials & interfaces, v 12(5), pp 5866-5875
- Publisher
- American Chemical Society; Washington, DC
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering; Mechanical Engineering and Mechanics
- Web of Science ID
- WOS:000512216900066
- Scopus ID
- 2-s2.0-85078937033
- Other Identifier
- 991014877831304721
UN Sustainable Development Goals (SDGs)
This publication has contributed to the advancement of the following goals:
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology