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Biocompatible ionic liquid-biopolymer electrolyte-enabled thin and compact magnesium-air batteries.

journal contribution
posted on 10.12.2014, 00:00 authored by X Jia, Y Yang, C Wang, C Zhao, R Vijayaraghavan, D R MacFarlane, Maria ForsythMaria Forsyth, G G Wallace
With the surge of interest in miniaturized implanted medical devices (IMDs), implantable power sources with small dimensions and biocompatibility are in high demand. Implanted battery/supercapacitor devices are commonly packaged within a case that occupies a large volume, making miniaturization difficult. In this study, we demonstrate a polymer electrolyte-enabled biocompatible magnesium-air battery device with a total thickness of approximately 300 μm. It consists of a biocompatible polypyrrole-para(toluene sulfonic acid) cathode and a bioresorbable magnesium alloy anode. The biocompatible electrolyte used is made of choline nitrate (ionic liquid) embedded in a biopolymer, chitosan. This polymer electrolyte is mechanically robust and offers a high ionic conductivity of 8.9 × 10(-3) S cm(-1). The assembled battery delivers a maximum volumetric power density of 3.9 W L(-1), which is sufficient to drive some types of IMDs, such as cardiac pacemakers or biomonitoring systems. This miniaturized, biocompatible magnesium-air battery may pave the way to a future generation of implantable power sources.

History

Journal

ACS Appl Mater Interfaces

Volume

6

Issue

23

Pagination

21110 - 21117

Publisher

American Chemical Society

Location

Washington, D.C.

eISSN

1944-8252

Language

eng

Publication classification

C Journal article; C1 Refereed article in a scholarly journal

Copyright notice

2014, American Chemical Society