Fig. 1. Electrostatic interaction-mediated fabrication of high-performance ionogels. The negative monomer of AMPS (a) generates transparent and flexible ionogel by virtue of the electrostatic interaction between negative PAMPS network and infused [EMIM][DCA] (b). (c) ESEM image of the PAMPS-based DN ionogel is uniform, indicating good compatibility between PAMPS network and [EMIM][DCA]. (d) CLSM image shows that the PAMPS network is full infused with [EMIM][DCA], probably owing to the strong electrostatic interaction between sulfonate groups in the PAMPS double network and imidazolium-based cations. The neutral monomer of AAm (e) generates opaque and fragile ionogel without electrostatic interaction (f). (g) ESEM image of the PAAm-based DN ionogel shows obvious micro pores, which are owing to the presence of water during frozen drying the ionogel for ESEM observation, indicating that water cannot be completely substituted by [EMIM][DCA]. (h) CLSM image of the PAAm-based DN ionogel shows that only a few [EMIM][DCA] are locked in the polymer network.