Transient, Implantable, Ultrathin Biofuel Cells Enabled by Laser-Induced Graphene and Gold Nanoparticles Composite
Xingcan Huang, Hu Li, Jiyu Li, Libei Huang, Kuanming Yao, Chun Ki Yiu, Yiming Liu, Tsz Hung Wong, Dengfeng Li, Mengge Wu, Ya Huang, Zhan Gao, Jingkun Zhou, Yuyu Gao, Jian Li, Yanli Jiao, Rui Shi, Binbin Zhang, Bofan Hu, Qinglei Guo, Enming Song, Ruquan Ye, Xinge Yu
Abstract
Transient power sources with excellent biocompatibility and bioresorablility have attracted significant attention. Here, we report high-performance, transient glucose enzymatic biofuel cells (TEBFCs) based on the laser-induced graphene (LIG)/gold nanoparticles (Au NPs) composite electrodes. Such LIG electrodes can be easily fabricated from polyimide (PI) with an infrared CO2 laser and exhibit a low impedance (16 Ω). The resulted TEBFC yields a high open circuit potential (OCP) of 0.77 V and a maximum power density of 483.1 μW/cm2. The TEBFC not only exhibits a quick response time that enables reaching the maximum OCP within 1 min but also owns a long lifetime over 28 days in vitro. The excellent biocompatibility and transient performance from in vitro and in vivo tests allow long-term implantation of TEBFCs in rats for energy harvesting. The TEBFCs with advanced processing methods provide a promising power solution for transient electronics.