A thin, deformable, high-performance supercapacitor implant that can be biodegraded and bioabsorbed within an animal body

Hongwei Sheng, Jingjing Zhou, Bo Li, Yuhang He, Xuetao Zhang, Jie Liang, Jinyuan Zhou, Qing Su, Erqing Xie, Wei Lan, Kairong Wang, Cunjiang Yu

Research output: Contribution to journalArticlepeer-review

67 Scopus citations

Abstract

It has been an outstanding challenge to achieve implantable energy modules that are mechanically soft (compatible with soft organs and tissues), have compact form factors, and are biodegradable (present for a desired time frame to power biodegradable, implantable medical electronics). Here, we present a fully biodegradable and bioabsorbable high-performance supercapacitor implant, which is lightweight and has a thin structure, mechanical flexibility, tunable degradation duration, and biocompatibility. The supercapacitor with a high areal capacitance (112.5 mF cm−2 at 1 mA cm−2) and energy density (15.64 μWh cm−2) uses two-dimensional, amorphous molybdenum oxide (MoOx) flakes as electrodes, which are grown in situ on water-soluble Mo foil using a green electrochemical strategy. Biodegradation behaviors and biocompatibility of the associated materials and the supercapacitor implant are systematically studied. Demonstrations of a supercapacitor implant that powers several electronic devices and that is completely degraded after implantation and absorbed in rat body shed light on its potential uses.

Original languageEnglish (US)
Article numbereabe3097
JournalScience Advances
Volume7
Issue number2
DOIs
StatePublished - Jan 6 2021

All Science Journal Classification (ASJC) codes

  • General

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