Fabrication of a coaxial high performance fiber lithium-ion battery supported by a cotton yarn electrolyte reservoir
- Authors
- Song, H.; Jeon, S.-Y.; Jeong, Y.
- Issue Date
- Jun-2019
- Publisher
- Elsevier Ltd
- Citation
- Carbon, v.147, pp.441 - 450
- Journal Title
- Carbon
- Volume
- 147
- Start Page
- 441
- End Page
- 450
- URI
- http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/32285
- DOI
- 10.1016/j.carbon.2019.02.081
- ISSN
- 0008-6223
- Abstract
- Our report describes a coaxial fiber-type lithium-ion battery consisting of cotton core yarn wrapped with carbon nanotube (CNT) films and a nano-web separator. The CNT film was used as a current collector because of its high conductivity, flexibility, and network structure. The cotton yarn served as an electrolyte reservoir and a skeleton for the fiber shape. The cotton yarn even absorbed electrolyte as much as 9 times its own weight and its diameter swelled up to a 20%, which resulted in robust interfacial contact between components of the battery. Also, the swelling behavior of cotton yarn due to electrolyte up-take was simulated to clarify the function of cotton yarn. The nano-web separator was beneficial in accommodating the in-plane deformation occurred during the bending of the battery. This coaxial fiber battery exhibited stable performance even under bent or knotted states and delivered 144.82 mWhcm −3 of volumetric energy density with high coloumbic efficiency of about 95%. Successful demonstration of the flexible fiber battery bespeaks a promising future for wearable electronic devices. © 2019 Elsevier Ltd
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