Flexible and Freestanding MoS₂ Nanosheet/Carbon Nanotube/Cellulose Nanofibril Hybrid Aerogel Film for High-Performance All-Solid-State Supercapacitors

Abstract

Flexible supercapacitors assembled with two-dimensional materials have become a research hotspot in recent years. Here, we have prepared two-dimensional nanomaterial MoS 2 and SWCNT, CNF aerogel composite electrode, and its flexible all-solid-state supercapacitor. SWCNT can inhibit the accumulation of MoS 2 nanosheets and enhance the conductivity of the composite electrode. CNF can improve the dispersion uniformity of MoS 2 and SWCNT, and endow the composite electrode with a high specific surface area (328.86 m 2 g –1 ) and excellent flexibility. MoS 2 –SWCNT/CNF supercapacitor has a good rectangular CV curve and symmetrical triangular GCD curve. The CV curve of the MoSCF3 supercapacitor with the highest MoS 2 –SWCNT content remains rectangular even at the scanning rate of 2000 mV s –1 . Its voltage window can reach 1.5 V. MoS 2 –SWCNT/CNF supercapacitor has a specific capacity of 605.32 mF cm –2 (scanning rate of 2 mV s –1 ) and 30.34 F g –1 (0.01 A g –1 ), an area specific energy of 35.61 mWh cm –2 (area specific power of 0.03 mW cm –2 ), and extremely high cycle stability (91.01% specific capacity retention rate after 10 000 cycles) and good flexibility. The fine nanocomposite structure gives MoS 2 –SWCNT/CNF supercapacitor impressive electrochemical performance and excellent flexibility, which can be used in the field of portable electronic devices and flexible devices.

Environmentally Friendly Water-Based Reduced Graphene Oxide/Cellulose Nanofiber Ink for Supercapacitor Electrode Applications

“…36 At higher scan rate, the CV curve altered slowly to a quasi-rectangular shape because of the insufficient diffusion of the ions of the electrolyte. 37 GCD performance of the water-based film electrode was measured to analyze the capacitive performance of the electrodes. The GCD curves at 1 mA/cm 2 current density (see Figure 4c) are roughly triangular and symmetrical.…”

Recent Advances in Molybdenum Disulfide and Its Nanocomposites for Energy Applications: Challenges and Development

“…At an area-specific power of 0.03 mW cm −2 , MoSCF 3 had a recorded area-specific energy of 35.61 mWh cm −2 . After undergoing 10,000 cycles of both charging and discharging, the capacity retention rate for MoSCF 3 was observed to be at 91.01% [ 206 ]. The creation of ultrathin electrodes using MoS 2 nanosheets through inkjet printing marks a significant advancement in the production of in-plane microsupercapacitors that are flexible and solid-state ( Figure 9 ).…”

Superior Cyclic Stability and Capacitive Performance of Cation- and Water Molecule-Preintercalated δ-MnO2/h-WO3 Nanostructures as Supercapacitor Electrodes

“…Therefore, SCs containing aqueous electrolytes are being studied extensively as a potentially useful energy storage technology due to their high power density, great cycling stability, fast charge/discharge efficiency, long lifespan, environmental friendliness, and cost-efficiency, which can act as a gap-filler between conventional simple dielectric capacitors and batteries. 4,5 However, as long-lasting applications need a high energy density, the widespread use of SCs has been hampered by their relatively low energy density. The hybridization of SC with battery-type materials is the most obvious way to achieve high energy density coupled to high power density inside a single device.…”