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Download fileTriggering a Self-Sustaining Reduction of Graphenes Oxide for High-Performance Energy Storage Devices
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posted on 2020-09-02, 15:36 authored by Shao Ing Wong, Han Lin, Jaka Sunarso, Basil T. Wong, Baohua JiaVarious
graphene oxide (GO) reductions, especially thermal routes,
are often performed, which not only require a huge energy input from
external heating sources, but also release abundant energy causing
potential environmental and safety hazards. This becomes a serious
bottleneck for large-scale reduced GO (RGO) production in industry
applications. Here, we demonstrate an energy efficient self-sustaining
GO reduction process, which can be initiated by a minor heat trigger.
The energy released from the initial deoxygenation is fed to the neighboring
sites for subsequent deoxygenation. Such a continuous energy feeding
process eventually reduces the entire GO film without any external
energy input. A large-scale uniformly reduced GO film can thus be
produced in an energy efficient way. The high quality of the self-sustaining
RGO is demonstrated by its high specific capacitance of 174.6 F g–1 and a device energy density of 63 Wh kg–1 when it is used as a supercapacitor electrode.