Free-Standing Working Electrodes for Supercapacitors Based on Composite Polymer Nanofibers and Functionalized with Graphene Oxide

AbstractInterfacial solar vapor generation has revived the solar-thermal-based desalination due to its high conversion efficiency of solar energy. However, most solar evaporators reported so far suffer from severe salt-clogging problems during solar desalination, leading to performance degradation and structural instability. Here, we demonstrate a free-standing salt-rejecting reduced graphene oxide (rGO) membrane serving as an efficient, stable, and antisalt-fouling solar evaporator. The evaporation rate of the membrane reaches up to 1.27 kg m−2 h−1 (solar–thermal conversion efficiency ∼79%) under one sun, out of 3.5 wt% brine. More strikingly, due to the tailored narrow interlayer spacing, the rGO membrane can effectively reject ions, preventing salt accumulation even for high salinity brine (∼8 wt% concentration). With enabled salt-antifouling capability, flexibility, as well as stability, our rGO membrane serves as a promising solar evaporator for high salinity brine treatment.

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Free-standing and flexible graphene supercapacitors of high areal capacitance fabricated by laser holography reduction of graphene oxide

Applied Physics Letters ◽

10.1063/5.0038508 ◽

2021 ◽

Vol 118 (7) ◽

pp. 071601

Author(s):

Xiu-Yan Fu ◽

Qing Cai ◽

Jia-Nan Ma ◽

Lin Zhu ◽

Dong-Dong Han ◽

...

Keyword(s):

Graphene Oxide ◽

Free Standing ◽

Areal Capacitance ◽

Laser Holography

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Hierarchical Porous RGO/PEDOT/PANI Hybrid for Planar/Linear Supercapacitor with Outstanding Flexibility and Stability

Nano-Micro Letters ◽

10.1007/s40820-019-0342-5 ◽

2020 ◽

Vol 12 (1) ◽

Cited By ~ 5

Author(s):

Fuwei Liu ◽

Luoyuan Xie ◽

Li Wang ◽

Wei Chen ◽

Wei Wei ◽

...

Keyword(s):

Graphene Oxide ◽

Energy Density ◽

Structural Design ◽

High Performance ◽

Rate Capability ◽

Cotton Yarn ◽

Reduced Graphene ◽

Hierarchical Porous ◽

Good Rate Capability ◽

Electrodes For Supercapacitors

AbstractMany hybrid electrodes for supercapacitors (SCs) are a reckless combination without proper structural design that keeps them from fulfilling their potential. Herein, we design a reduced graphene oxide/poly(3,4-ethylenedioxythiophene)/polyaniline (RGO/PEDOT/PANI) hybrid with hierarchical and porous structure for high-performance SCs, where components fully harness their advantages, forming an interconnected and conductive framework with substantial reactive sites.Thus, this hybrid achieves a high capacitance of 535 F g−1 along with good rate capability and cyclability. The planar SC based on this hybrid deliver an energy density of 26.89 Wh kg−1 at a power density of 800 W kg−1. The linear SC developed via modifying a cotton yarn with the hybrid exhibits good flexibility and structural stability, which operates normally after arbitrary deformations. This work provides a beneficial reference for developing SCs.

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