Superelastic aerogels have excellent electrical conductivity, reversible compressibility and high durability, and have huge application potential in various emerging applications ranging from wearable electronic devices to multifunctional stents.



Recently, Joselito M. Razal of Deakin University in Australia reported that MXene and GO flakes were mixed, followed by multi-stage reduction of GO, freezing casting, and finally annealing treatment to prepare MXene/rGO superelastic aerogel. By optimizing the composition and reduction conditions, the reversible compressive strain of the synthesized aerogel is 95%, which exceeds all the values reported so far.







The main points of the article

1) The conductive MXene/rGO network has fast electron transfer and stable structural integrity under compression/release cycles.



2) After assembling it into a compressible supercapacitor, the capacity retention rate after 1000 compression/release cycles is 97.2%. In addition, the high conductivity and porous structure also make MXene/rGO-based piezoresistive sensors with high sensitivity (0.28 kPa−1), wide detection range (up to 66.98 kPa) and ultra-low detection limit (～60 Pa).







This super-elastic MXene/rGO aerogel is expected to further promote the wide application of Mxene-based materials in wearable electronic devices, electromagnetic interference shielding and flexible energy storage devices.

 

references

Degang Jiang, et al, Superelastic Ti3C2Tx MXene-Based Hybrid Aerogels for Compression Resilient Devices, ACS Nano, 2021

DOI: 10.1021/acsnano.0c09959

https://dx.doi.org/10.1021/acsnano.0c09959