期刊
ACS APPLIED MATERIALS & INTERFACES
卷 10, 期 43, 页码 37233-37241出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b12486
关键词
wearable device; asymmetric supercapacitor; carbon nanotube fiber; Na-doped MnO2; MoS2
资金
- National Natural Science Foundation of Shanghai [16ZR1439400, 17ZR1447700]
- Fundamental Research Funds for Central Universities [PA2018001041]
- National Natural Science Foundation of China [51522211, 51528203, 51602339]
Flexible fiber-shaped supercapacitors hold promising potential in the area of portable and wearable electronics. Unfortunately, their general application is hindered by the restricted energy densities due to low operating voltage and small specific surface area. Herein, an all-solid-state fiber-shaped asymmetric super-capacitor (FASC) possessing ultrahigh energy density is reported, in which the positive electrode was designed as Na-doped MnO2 nanosheets on carbon nanotube fibers (CNTFs) and the negative electrode as MoS2 nanosheet-coated CNTFs. Owing to the excellent properties of the designed electrodes, our FASCs exhibit a large operating potential window (0-2.2 V), a remarkable specific capacitance (265.4 mF/cm(2)), as well as an ultrahigh energy density (178.4 mu Wh/cm(2)). Moreover, the devices are of outstanding mechanical flexibility.
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