Journal
COMPOSITES COMMUNICATIONS
Volume 27, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.coco.2021.100853
Keywords
Composite structural battery; Carbon fiber; Surface modification; Computational modeling
Categories
Funding
- National Science Foundation of China [11872099]
- Fundamental Research Funds for the Central Universities, Beihang University
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The study investigated the performance of composite structural batteries utilizing modified carbon fibers as electrodes, finding an optimal cathode to anode thickness ratio for improved electrochemical performance and noting that thinner modified carbon fiber electrodes can enhance specific capacity.
The interfacial strength and electrochemical performance of composite structural battery can be simultaneously enhanced by employing modified carbon fibers (MCFs) as electrode. In this study, an electrochemical-mechanical coupled modeling framework is developed to clarify the multiphysics nature of composite structural battery and guide their further optimal design. Effects of the thickness ratio of cathode to anode, electrode thickness and the volume ratio of modified layer on CFs for the electrochemical and mechanical properties are investigated. An optimal thickness ratio of MCFs cathode to anode exists for better electrochemical performance, while thinner MCFs electrode will trigger greater specific capacity. In addition, the volume fraction of carbon fiber in composites and that of modified layer on CF respectively dominate longitudinal modulus and electrochemical capacity.
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