박태규 (한양대학교)

한빛사논문

조회242

한양대학교

Biosens. Bioelectron., Oct 15 2023, 243 S0956-5663(23)00699-1 | https://doi.org/10.1016/j.bios.2023.115757 Implantable anti-biofouling biosupercapacitor with high energy performance

Taegyu Park ^a, Dong Yeop Lee ^a, Bum Ju Ahn ^b, Minwoo Kim^c, Junsoo Bok ^c, Ju-Seop Kang ^b, Jae Myeong Lee ^a,d, Changsoon Choi ^d, Yongwoo Jang ^b,c

^aDepartment of Electronic Engineering, College of Engineering, Hanyang University, Seoul, 04763, South Korea

^bDepartment of Pharmacology, College of Medicine, Hanyang University, Seoul 04736, South Korea

^cDepartment of Medical and Digital Engineering, College of Engineering, Hanyang University, Seoul 04736, South Korea

^dDepartment of Energy and Materials Engineering, College of Engineering, Dongguk University, Seoul, 04620, South Korea

Corresponding author : Yongwoo Jang

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/cm ²), 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.

논문정보

형식Research article
게재일2023년 10월 (BRIC 등록일 2023-10-23)
연구진국내 연구진
분야 바이오·의료융합 > 바이오센싱 및 나노바이오물질

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