In:
Advanced Energy Materials, Wiley, Vol. 13, No. 16 ( 2023-04)
Abstract:
Implantable power sources face great challenges in balancing multiple factors including high performance, biocompatibility, mechanical properties for soft tissue fit, and biodegradability. Toward this goal, a simple and feasible method is proposed to prepare implantable a hydrogel‐based supercapacitor (SC). Specially, a multinetwork conductive electrode is in situ formed by aminated‐reduced‐graphene‐oxide‐and‐methacrylic‐anhydride‐comodified sericin (SrMA/A‐rGO) sequentially cross‐linking with four‐arm polyethylene glycol succinimide carbonate and polyethylene glycol acrylate. The conductive multinetwork endows the SrMA/A‐rGO‐based SC implant an equivalent series resistance of 21 Ω cm −2 , a volumetric energy density of 26.0 µW cm −2 , and a high specific capacitance retention (over 76.4%) after long‐term charging/discharging. Two SCs connected in tandem are able to light up a light‐emitting diode for both in vitro and in vivo studies. Moreover, they can work as a direct output power source to electrically stimulate a stopped heart to start beating again. Additionally, the SC exhibits superior biocompatibility and biodegradability in vivo, and holds the value of specific capacitance above 30% 2 weeks after implantation. Thus, this work demonstrates the SrMA/A‐rGO‐based SC's potential to serve as a power storage unit for medical implants (such as a temporary pacemaker).
Type of Medium:
Online Resource
ISSN:
1614-6832
,
1614-6840
DOI:
10.1002/aenm.202203814
Language:
English
Publisher:
Wiley
Publication Date:
2023
detail.hit.zdb_id:
2594556-7
