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All Two-Dimensional Pseudocapacitive Sheet Materials for Flexible Asymmetric Solid-State Planar Microsupercapacitors with High Energy Density
Zhao, Fangfang; Liu, Weihong; Qiu, Tianlun; Gong, Wen-Bin; Ma, Wei; Li, Qingwen; Li, Feng; Geng, Fengxia
2020
Source PublicationACS NANO
Volume14Issue:1Pages:603-610
AbstractWith the rapid development of portable devices and wireless protocols, miniaturized energy storage units have become an important prerequisite. Although in-plane microsupercapacitors are emerging as competitive candidate devices, their practical applications have been severely hindered by their low energy density. Here, employing pseudocapacitive active materials working in complementary voltage windows, namely, manganese oxide (MnO2) and titanium carbide (Ti3C2), both in the two-dimensional sheet morphology, a flexible asymmetric interdigitated solid-state microsupercapacitor was assembled. Profiting from the perfect voltage complementarity of the two types of sheets, the high exposure of electrochemically active sites and the maximized utilization of the sheets due to the planar ion transport, the designed device achieved excellent electrochemical performance even when using a gel electrolyte. In particular, the device obtained a high specific capacitance of 106 F g(-1) (295 mF cm(-2)), a wide potential window (2 V), an ultrahigh rate performance (retaining 83% even with a 20-fold in current density to 20 A g(-1)), an excellent cycling stability (87% retention after 10(4) cycles at 10 A g(-1)), and a competitive energy density of 58 W h kg(-1) (162 mu W h cm(-2)) that are even comparable to those of some microbatteries, while maintaining a high power density of 985 W kg(-1) (2.7 mW cm(-2)). Importantly, this outstanding electrochemical performance was also stably maintained under various bending conditions. These results indicate that two-dimensional pseudocapacitive sheet materials have a plethora of possibilities for constructing flexible and wearable devices.
DOI10.1021/acsnano.9b07183
WOS IDWOS:000510531500051
Citation statistics
Cited Times:10[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/83289
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Zhao, Fangfang,Liu, Weihong,Qiu, Tianlun,et al. All Two-Dimensional Pseudocapacitive Sheet Materials for Flexible Asymmetric Solid-State Planar Microsupercapacitors with High Energy Density[J]. ACS NANO,2020,14(1):603-610.
APA Zhao, Fangfang.,Liu, Weihong.,Qiu, Tianlun.,Gong, Wen-Bin.,Ma, Wei.,...&Geng, Fengxia.(2020).All Two-Dimensional Pseudocapacitive Sheet Materials for Flexible Asymmetric Solid-State Planar Microsupercapacitors with High Energy Density.ACS NANO,14(1),603-610.
MLA Zhao, Fangfang,et al."All Two-Dimensional Pseudocapacitive Sheet Materials for Flexible Asymmetric Solid-State Planar Microsupercapacitors with High Energy Density".ACS NANO 14.1(2020):603-610.
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