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

Huanjun Chang; Longfei Zhang; Shaoyi Lyu; Siqun Wang

doi:10.1021/acsomega.2c01815

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

ACS Omega. 2022 Apr 15;7(16):14390-14399. doi: 10.1021/acsomega.2c01815. eCollection 2022 Apr 26.

Authors

Huanjun Chang¹, Longfei Zhang^{1

2}, Shaoyi Lyu^{1

2}, Siqun Wang³

Affiliations

¹ Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing 100091, China.
² Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China.
³ Center for Renewable Carbon, University of Tennessee, Knoxville, Tennessee 37996, United States.

Abstract

Flexible supercapacitors assembled with two-dimensional materials have become a research hotspot in recent years. Here, we have prepared two-dimensional nanomaterial MoS₂ and SWCNT, CNF aerogel composite electrode, and its flexible all-solid-state supercapacitor. SWCNT can inhibit the accumulation of MoS₂ nanosheets and enhance the conductivity of the composite electrode. CNF can improve the dispersion uniformity of MoS₂ and SWCNT, and endow the composite electrode with a high specific surface area (328.86 m² g^-1) and excellent flexibility. MoS₂-SWCNT/CNF supercapacitor has a good rectangular CV curve and symmetrical triangular GCD curve. The CV curve of the MoSCF3 supercapacitor with the highest MoS₂-SWCNT content remains rectangular even at the scanning rate of 2000 mV s^-1. Its voltage window can reach 1.5 V. MoS₂-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 MoS₂-SWCNT/CNF supercapacitor impressive electrochemical performance and excellent flexibility, which can be used in the field of portable electronic devices and flexible devices.