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Silver nanowires (AgNWs) are a promising substitute for indium tin oxide (ITO) transparent conductive films (TCFs). However, AgNWs suffer the insufficiencies in contact resistance between the nanowires and light loss. Here, graphene oxide and moth-eye-like antireflection nanostructure have been introduced to physically "weld" the AgNWs junctions and modulate the AR properties, respectively. The sandwich structure AgNWs TCFs achieved resistance of 26.26 Ω sq−1 and transmittance of 98.67%, exhibiting promoted photoelectronic performance compared with the pure AgNWs films. The stability of sandwich structure AgNWs TCFs was improved, and their wettability was also discussed with water contact angle changed from 92.55° to 69.18°, switched from hydrophobic to hydrophilic. Though a simple solution process without mechanical or heat post-treatment, we proposed a stable sandwich structure to obviously improve the electrical and optical capabilities of AgNWs. The enhanced AgNWs TCFs with superior photoelectronic performance are believed to boost the practical applications and future development of AgNWs-based TCFs. [ABSTRACT FROM AUTHOR]

We have developed a facile one-step hydrothermal strategy to synthesize pyramid-like NiSe2 nanostructures, serving as electrode materials for battery-supercapacitor hybrid (BSH) devices. The NiSe2 nanopyramid electrode exhibits superior electrochemical performances, including a high specific capacity of 240.83 mAh g−1 at current density of 1 A g−1 and a low internal resistance of 0.85 Ω. The all-solid-state hybrid devices have been assembled with NiSe2 as the battery-type electrode and activated carbon as the capacitor-type electrode. The hybrid device exhibits a high energy density of 0.196 mWh cm−2 at power density of 1.60 mW cm−2. The internal resistance of 1.52 Ω further reveals the nature of low resistance and high conductivity for the hybrid devices. Connecting two hybrid devices in series is able to drive a red LED for more than 3 min after charging for 9 s. This work has demonstrated that the pyramid-like NiSe2 nanostructure is expected to be an ideal high specific capacity electrode for BSH devices, especially for all-solid-state energy storage devices and portable electronic devices. [ABSTRACT FROM AUTHOR]

Toward the fast development of portable devices, the lightweight, flexible, and even wearable energy storage devices are very required. One effective device is the graphene-based fiber supercapacitors. Here we present the core–shell Co3O4/graphene hybrid fibers by hydrothermal method for the first time, where Co3O4 directly grows on the surface of graphene forming excellent hierarchical nanostructures. The combination of the Co3O4 shell and graphene core evidently improves the capacitive behaviors of the hybrid fibers. The Co3O4/graphene hybrid fibers are lightweight, flexible, and wearable, showing ultrahigh electrochemical performances such as large specific capacitance of 236.8 F g−1 (196.3 mF cm−2) at current density of 0.2 A g−1, outstanding rate capability, and excellent cycling stability (72.7% retention after 10000 cycles). The high electrochemical performances reveal the great potential of core–shell Co3O4/graphene hybrid fibers as electrodes in the energy storage system. [ABSTRACT FROM AUTHOR]