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Biocompatible ionic liquid-biopolymer electrolyte-enabled thin and compact magnesium-air batteries
Xiaoteng Jia1, Yang Yang, Caiyun Wang
1Intelligent Polymer Research Institute, ARC Centre of Excellence for Electromaterials Science, University of Wollongong , Wollongong 2522, Australia.
ACS Applied Materials & Interfaces
|November 8, 2014
Summary
This study presents a thin, biocompatible magnesium-air battery for implantable medical devices (IMDs). The novel power source offers sufficient energy density for devices like pacemakers, advancing miniaturized medical technology.
Area of Science:
- Biomedical Engineering
- Materials Science
- Electrochemistry
Background:
- Miniaturized implantable medical devices (IMDs) require compact and biocompatible power sources.
- Current implantable batteries/supercapacitors face limitations due to bulky packaging, hindering device miniaturization.
Purpose of the Study:
- To develop a polymer electrolyte-enabled, biocompatible magnesium-air battery with reduced dimensions.
- To assess the suitability of this novel battery for powering IMDs.
Main Methods:
- Fabrication of a ~300 μm thick magnesium-air battery.
- Utilized a polypyrrole-para(toluene sulfonic acid) cathode and a bioresorbable magnesium alloy anode.
- Employed a biocompatible polymer electrolyte comprising choline nitrate ionic liquid within a chitosan matrix.
Main Results:
- Achieved a high ionic conductivity of 8.9 × 10(-3) S cm(-1) for the polymer electrolyte.
- The assembled battery demonstrated a maximum volumetric power density of 3.9 W L(-1).
- The device exhibits mechanical robustness and biocompatibility.
Conclusions:
- The developed miniaturized, biocompatible magnesium-air battery meets the power requirements for certain IMDs.
- This technology represents a promising advancement for next-generation implantable power sources.
