Supercapacitive brophene-graphene aerogel as elastic-electrochemical dielectric layer for sensitive pressure sensors

[Display omitted] •Superelastic supercapacitive borophene-graphene aerogel is reported.•A sensitive pressure sensor with a symmetrical structure is fabricated.•The pressure sensor exhibits with sensitivity of 0.90 KPa−1.•The pressure sensors can monitor physiological signals and crop maturity. A sensitive pressure sensor based on ultralight and superelastic supercapacitive borophene-graphene aerogel as dielectric layer is reported. The borophene-graphene aerogel not only combines large specific surface area of reduced graphene oxide and high conductivity of borophene, but also exhibits rich porous structure. The strong synergy and intercalation between two different two-dimensional materials benefit electron transfer and electrolyte ion diffusion. On the one hand, the aerogel exhibits greater mass specific capacitance of 330 F g−1 than pure graphene aerogel. More importantly, serving as dielectric layer for pressure sensors with a symmetrical structure, the sensor represents ultra-high sensitivity (0.90 KPa−1) in the pressure range (