Antifreezing Hydrogel Electrolyte with Ternary Hydrogen Bonding for High‐Performance Zinc‐Ion Batteries

Abstract The new‐generation flexible aqueous zinc‐ion batteries require enhanced mechanical properties and ionic conductivities at low temperature for practical applications. This fundamentally means that it is desired that the hydrogel electrolyte possesses antifreezing merits to resist flexibility loss and performance decrease at subzero temperatures. Herein, a highly flexible polysaccharide hydrogel is realized in situ and is regulated in zinc‐ion batteries through the Hofmeister effect with low‐concentration Zn(ClO 4 ) 2 salts to satisfy the abovementioned requirements. The chaotropic ClO 4 − anions, water, and polymer chains can form ternary and weak hydrogen bonding (HB), which enables the polymer chains…

• NS
  Natural Science Foundation of Shanghai

  Award: 19ZR1470700
• NN
  National Natural Science Foundation of China

  Awards: 51903041, 51973035