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Park T, Lee DY, Ahn BJ, Kim M, Bok J, Kang JS, Lee JM, Choi C, Jang Y. Implantable anti-biofouling biosupercapacitor with high energy performance. Biosens Bioelectron 2024; 243:115757. [PMID: 37862758 DOI: 10.1016/j.bios.2023.115757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Revised: 09/12/2023] [Accepted: 10/11/2023] [Indexed: 10/22/2023]
Abstract
Biofluidic open-type supercapacitors offer significant advantages over batteries in implantable electronics. However, poor energy storage in bioelectrolytes and performance degradation owing to electrode biofouling remain challenges and hamper their implementation. In this study, we present a flexible polydopamine (PDA)-infiltrated carbon nanotube (CNT) yarn (PDA/CNT) supercapacitor with high performance in biofluids, encapsulated by a hydrogel-barrier circular knit that provides anti-biofouling protection. Infiltration of the biopolymer PDA provide a hydrophilic coating to obtain a hydrophobic CNT electrode under aqueous conditions and an energy density 250-fold higher than that of the pristine CNT in the biofluid. The PDA/CNT supercapacitor exhibited remarkable energy performance in biological fluids in terms of the maximum areal capacitance (503.91 mF cm-2), energy density (274 μWh/cm2), and power density (25.52 mW cm-2). Moreover, it demonstrated negligible capacitance loss after 10,000 repeated charge/discharge cycles and bending tests. To prevent biofouling, the PDA/CNT electrode was encapsulated in an agarose-coated circular knit that allows free movement of the electrolyte. Notably, implanting an encapsulated PDA/CNT supercapacitor into the abdominal cavity of rat resulted in stable in vivo energy storage performance without biofouling for 21 d, and the charged supercapacitor was used successfully to power a light-emitting diode in vivo.
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Affiliation(s)
- Taegyu Park
- Department of Electronic Engineering, College of Engineering, Hanyang University, Seoul, 04763, South Korea
| | - Dong Yeop Lee
- Department of Electronic Engineering, College of Engineering, Hanyang University, Seoul, 04763, South Korea
| | - Bum Ju Ahn
- Department of Pharmacology, College of Medicine, Hanyang University, Seoul 04736, South Korea
| | - Minwoo Kim
- Department of Medical and Digital Engineering, College of Engineering, Hanyang University, Seoul 04736, South Korea
| | - Junsoo Bok
- Department of Medical and Digital Engineering, College of Engineering, Hanyang University, Seoul 04736, South Korea
| | - Ju-Seop Kang
- Department of Pharmacology, College of Medicine, Hanyang University, Seoul 04736, South Korea
| | - Jae Myeong Lee
- Department of Electronic Engineering, College of Engineering, Hanyang University, Seoul, 04763, South Korea; Department of Energy and Materials Engineering, College of Engineering, Dongguk University, Seoul, 04620, South Korea
| | - Changsoon Choi
- Department of Energy and Materials Engineering, College of Engineering, Dongguk University, Seoul, 04620, South Korea
| | - Yongwoo Jang
- Department of Pharmacology, College of Medicine, Hanyang University, Seoul 04736, South Korea; Department of Medical and Digital Engineering, College of Engineering, Hanyang University, Seoul 04736, South Korea.
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