Eutectogels are emerging as the next-generation stretchable electronics due

to their superior ionic conductivity, non-volatility, and cost-effectiveness.

Nevertheless, most eutectogels suffer from weak mechanical strength and

toughness and pronounced hygroscopicity. Herein, a strategy is proposed to

fabricate phase-separated eutectogels with dual ionic channels (PSDIC-gel),

which exhibit exceptional integrative properties, especially water resistance.

By blending hydrophilic/hydrophobic polymerizable deep eutectic solvents,

dual ionic channels spontaneously form via polymerization-induced phase

separation. The hydrophilic poly(acrylic acid) (PAA) phase containing

Li+-channels, rich in hydrogen bonding and ion-dipole interactions, provides

mechanical strength and conductivity. The hydrophobic poly(hexafluorobutyl

acrylate) (PHFBA) phase incorporating cholinium cation (Ch+) channels

enhances toughness, conductivity, and water resistance. Adjusting the phase

ratio yields a microphase-separated transparent eutectogel with high tensile

strength (6.03 MPa), toughness (16.18 MJ m?3), excellent ionic conductivity

(1.6 × 10?3 S m?1), strong substrate adhesion, and rapid room-temperature

self-healing. Solid-state NMR reveals the conductive mechanism and the

phase-separated structure featuring dual ionic channels in PSDIC-gels,

advancing the understanding of complex ionic interactions at the atomic level.

The PSDIC-gel enables a flexible triboelectric nanogenerator for accurate

real-time self-powered human motion sensing. This work advances eutectogel

design through structure-property engineering, offering a universal strategy to

reconcile mechanical robustness, environmental suitability, and ionic

conductivity for wearable electronics.