Poly(vinyl alcohol)/phosphoric acid gel electrolyte@polydimethylsiloxane sponge for piezoresistive pressure sensors

A conductive sponge was prepared by immersing PDMS sponge in PVA/H 3 PO 4 gel electrolyte. The PVA/H 3 PO 4 gel electrolyte builds a 3D conductive network inside the sponge. The sponge exhibited good sensitivity of 0.1145 kPa −1 (0–6.5 kPa).