Journal
ACS ENERGY LETTERS
Volume 2, Issue 4, Pages 831-836Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsenergylett.7b00012
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Funding
- Australian Research Council Centre of Excellence Scheme [CE 140100012]
- ARC under the Australian Laureate Fellowship scheme [FL110100196, FL110100013, FL120100019]
- Office of Naval Research [N00014-13-1-0596]
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Transient implantable medical bionics offer great promise in the field of smart controlled release and tissue regeneration. On-board energy storage is the ideal power system to drive them. In this work, a critical component of such a device, a biodegradable polymer electrolyte (silk fibroin choline nitrate) has been developed. The efficiency of this electrolyte is demonstrated when deployed in a biodegradable thin-film magnesium battery. The battery, encapsulated in silk, offers a specific capacity of 0.06 mAh cm(-2). The enzymatic degradation of the whole device occurs over 45 days in the buffered protease XIV solution. A programmed battery lifetime can be achieved using silk protection layers. This battery system provides a new avenue for an on-board biodegradable power source for next-generation transient medical bionics.
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