期刊
MATERIALS HORIZONS
卷 5, 期 5, 页码 883-889出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8mh00474a
关键词
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资金
- National Natural Science Foundation of China (NSFC) [51572133, 51672137, 51702174, 51702175, 51702176]
- Zhejiang Provincial Nature Science Foundation [LQ17E020002]
- Natural Science Foundation of Ningbo Municipal Government [2016A610103, 2016A610109, 2017A610002]
The exploration of energy conversion and storage devices for wide-temperature operation is presently a grand challenge. Herein, the single-crystalline integrated energy-storage units based on highly-oriented 4H-SiC nanochannel arrays (NCAs) were fabricated via an improved electrochemical anodic oxidation technique from 4H-SiC wafers. The as-prepared SiC NCAs electrode exhibits an areal capacitance of 14.8 mF cm(-2) at 10 mV s(-1), which is the highest for SiC electrodes ever reported and also 6-fold higher in comparison to that of SiC nanowire array electrode (NWAs, 2.32 mF cm(-2)). Moreover, the resultant 4H-SiC NCAs exhibit an extremely stable cycling performance in aqueous electrolytes, with higher than 95% retention of initial capacitance regardless of being serviced under low, high or cross-fade temperatures for 11000 charge-discharge cycles, demonstrating that they are nearly full-featured for robust wide-temperature operation.
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