Decoupling elasticity and electrical conductivity of carbon black gels filled with insulating non-Brownian grains
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arXiv
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866913496537497600 |
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| author | Larsen, Thomas Royer, John R. Laidlaw, Fraser H. J. Poon, Wilson C. K. Larsen, Tom Andreasen, Søren J. Christiansen, Jesper de C. |
| author_facet | Larsen, Thomas Royer, John R. Laidlaw, Fraser H. J. Poon, Wilson C. K. Larsen, Tom Andreasen, Søren J. Christiansen, Jesper de C. |
| contents | A unique bistable transition has been identified in granular/colloidal gel-composites, resulting from shear-induced phase separation of the gel phase into dense blobs. In energy applications, it is critical to understand how this transition influences electrical performance. Mixing conductive colloids with conductive inclusions, we find the conductivity and elasticity move in concert, both decreasing in the collapsed phase-separated state. Surprisingly, with insulating inclusions these properties can become decoupled, with the conductivity instead increasing despite the collapse of the gel structure. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_06974 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Decoupling elasticity and electrical conductivity of carbon black gels filled with insulating non-Brownian grains Larsen, Thomas Royer, John R. Laidlaw, Fraser H. J. Poon, Wilson C. K. Larsen, Tom Andreasen, Søren J. Christiansen, Jesper de C. Soft Condensed Matter A unique bistable transition has been identified in granular/colloidal gel-composites, resulting from shear-induced phase separation of the gel phase into dense blobs. In energy applications, it is critical to understand how this transition influences electrical performance. Mixing conductive colloids with conductive inclusions, we find the conductivity and elasticity move in concert, both decreasing in the collapsed phase-separated state. Surprisingly, with insulating inclusions these properties can become decoupled, with the conductivity instead increasing despite the collapse of the gel structure. |
| title | Decoupling elasticity and electrical conductivity of carbon black gels filled with insulating non-Brownian grains |
| topic | Soft Condensed Matter |
| url | https://arxiv.org/abs/2405.06974 |