Organohydrogel electrolyte-based flexible zinc-ion hybrid supercapacitors with dendrite-free anode, broad temperature adaptability and ultralong cycling life

Organo‐Hydrogel Electrolytes with Versatile Environmental Adaptation for Advanced Flexible Aqueous Energy Storage Devices

“…The weight loss of this organo‐hydrogel at 80 °C was only 19%, obviously lower than that of the corresponding hydrogel (76%), suggesting the improved anti‐drying and water‐retention performance. [ 57 ] These results collectively demonstrated that the adjustment of EG content contributed to the regular operation of the quasi‐solid‐state electrolytes under all‐climate conditions. Compared with hygroscopic EG, Gly possesses a higher boiling point, lower vapor pressure, and better freezing resistance.…”

“…In organo-hydrogel electrolyte energy storage devices, gel materials can be used as electrolytes and separators, which can address the leakage issue of aqueous electrolytes under external tensile strain. [61] Based on the intrinsic mechanical merits of [57] Copyright 2022, Elsevier. b) The formation of the gelatin supramolecular organo-hydrogels with anti-freezing properties.…”

“…a) Synthesis route of the ethylene glycol (EG)-modified organo-hydrogel electrolyte. Reproduced with permission [57]. Copyright 2022, Elsevier.…”

Hydrogen bond regulating in hydrogel electrolytes for enhancing the antifreeze ability of a flexible zinc-ion hybrid supercapacitor

“…This should be attributed to the fact that the increase of organic solvent DMSO reduces the ionic conductivity of the hydrogel electrolyte as well as the solubility of ZnSO 4 in the mixture. 53 According to the GCD diagram, the capacity of the FZHSC based on the PCD-1 hydrogel is 253.17 F g −1 , while the capacity of the FZHSC based on the PCD-4 hydrogel is 208.51 F g −1 (Fig. 3c), which is a decrease by 17.6%.…”

A Hofmeister effect induced hydrogel electrolyte–electrode interfacial adhesion enhancement strategy for energy-efficient and mechanically robust redoxcapacitors

“…[21][22][23] More crucially, previously reported exible ZHSCs were typically fabricated by sandwiching a hydrogel electrolyte between a pair of exible electrodes. [24][25][26][27] This rather crude assembly process inevitably leads to the delamination of the components during repeated mechanical deformation, especially due to strain mismatch and the lack of tough interfacial adhesion between the components. [28][29][30][31] These drawbacks greatly undermine the achievable electrochemical performance and mechanical robustness of the exible ZHSCs for wearable applications.…”