Abstract
Reactive oxygen species or superoxide (O2 -), which damages or ages biological cells, is generated during metabolic pathways using oxygen as an electron acceptor in biological systems. Superoxide dismutase (SOD) protects cells from superoxide-triggered apoptosis by converting superoxide to oxygen and peroxide. Lithium-oxygen battery (LOB) cells have the same aging problems caused by superoxide-triggered side reactions. We transplanted the function of SOD of biological systems into LOB cells. Malonic acid-decorated fullerene (MA-C60) was used as a superoxide disproportionation chemocatalyst mimicking the function of SOD. As expected, MA-C60 as the superoxide scavenger improved capacity retention along charge/discharge cycles successfully. A LOB cell that failed to provide a meaningful capacity just after several cycles at high current (0.5 mA cm-2) with 0.5 mAh cm-2 cutoff survived up to 50 cycles after MA-C60 was introduced to the electrolyte. Moreover, the SOD-mimetic catalyst increased capacity, e.g., more than a 6-fold increase at 0.2 mA cm-2.
Original language | English |
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Pages (from-to) | 9190-9197 |
Number of pages | 8 |
Journal | ACS Nano |
Volume | 13 |
Issue number | 8 |
DOIs | |
Publication status | Published - 2019 Aug 27 |
Bibliographical note
Funding Information:This work was supported by Samsung Research Funding Incubation Center of Samsung Electronics under Project Number SRFC-MA-1802-04. S.K.K. acknowledges the computational resources from Korea Institute of Science and Technology Information (KISTI-HPC)
Funding Information:
This work was supported by Samsung Research Funding & Incubation Center of Samsung Electronics under Project Number SRFC-MA-1802-04. S.K.K. acknowledges the computational resources from Korea Institute of Science and Technology Information (KISTI-HPC).
Publisher Copyright:
Copyright © 2019 American Chemical Society.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Engineering(all)
- Physics and Astronomy(all)