Flexible and Freestanding MoS 2 Nanosheet/Carbon Nanotube/Cellulose Nanofibril Hybrid Aerogel Film for High-Performance All-Solid-State Supercapacitors.

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.