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Figure 10. (A) Zinc-ion hybrid supercapacitor based on zwitterionic hydrogel electrolytes: (i) design strategy; (ii) self-healing demonstration of ZIHS based on PAB₄₀-Zn hydrogel; (iii) capacity recovery efficiency of ZIHS under different cutting/healing cycles; (iv) pictures of PAB₄₀-Zn hydrogel adhered to various materials. Reproduced with permission from^[137]. Copyright 2023, Elsevier; (B) All-in-one SCs with PVA/PAS-PPy gel: (i) the synthesis process of PVA/PAS-PPy gel; (ii) Sensing performance comparison before and after immersion in deionized water for 30 days; (iii) SCs are assembled to power a red LED. Reproduced with permission from^[26]. Copyright 2022, American Chemical Society. AA: Acrylic acid; PVA: poly (vinyl alcohol); PAS: poly (acrylamide-co-[(3-(1-(4-vinylbenzyl)-1H-benzo[d]imidazole-3-ium-3-yl)propane-1-sulfonate); PPy: polypyrrole; ZIHS: zinc-ion hybrid supercapacitor; PAB: poly (acrylic acid-betaine); SCs: supercapacitors.