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. 2020 Nov 27;12(12):2812. doi: 10.3390/polym12122812

Figure 15.

Figure 15

Physicochemical characterization of the electrolyte and the electrode. (a) The stretchability of the PANa hydrogel at different temperatures infused with concentrated ions and deionized water, respectively. (b) Ionic conductivities of the highly concentrated PANa hydrogel at different temperatures. The inset image shows the PANa hydrogel electrolyte used as an ionic conductor to successfully connect the LED circuit. (c) SEM images of the freeze-dried PANa hydrogel at different temperatures (left: −20 °C, right: 50 °C). Reproduced with permission from [170]. Copyright 2019 The American Chemical Society.