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Highly Compressible Nitrogen-Doped Carbon Foam Electrode with Excellent Rate Capability via a Smart Etching and Catalytic Process
journal contribution
posted on 2017-04-17, 00:00 authored by Kang Xiao, Yanhua Zeng, Jin Long, Hongbin Chen, Liang-Xin Ding, Suqing Wang, Haihui WangFreestanding three-dimensional
nitrogen-doped carbon foam with
large pores is proposed as a promising electrode configuration for
elastic electronics. Although it exhibits excellent mechanical performance,
the capacitive performances (especially its rate capability) are still
unsatisfactory. By using KMnO4, we demonstrate a smart
etching and catalytic process to form highly graphitized and etched
nitrogen-doped carbon foam (ENCF) with an exfoliated carbon-shell
architecture. These compositional and structural features endow the
ENCF electrodes with excellent electron conductivity as well as more
ion-accessible electrochemical active sites. Significantly, all-solid-state
symmetric supercapacitor devices based on the ENCF electrodes exhibit
enhanced specific capacitance and marked high-rate capability. Furthermore,
the integrated device has no significant capacity loss under 60% compressive
strain.
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nitrogen-doped carbon foamcapacity lossKMnO 4Excellent Rate CapabilityENCF electrodesion-accessible electrochemicalelectron conductivityelectrode configurationexfoliated carbon-shell architectureCatalytic Process Freestandingrate capabilitysupercapacitor devicesENCF electrodes exhibitCompressible Nitrogen-Doped Carbon Foam Electrodecapacitive performancesSmart Etching