Construction of zwitterionic osmolyte-based hydrogel electrolytes towards stable zinc anode for durable aqueous zinc ion storage and integrated electronics

Abstract

A zwitterionic osmolyte hydrogel electrolyte (SPS–Zn) modulates Zn deposition and suppresses dendrite growth. Batteries with SPS–Zn show a long cycling life and the material can be used to prepare integrated i-skin for detecting physiological signals.

Low-Cost “Water-in-Salt” Hydrogel Electrolyte Enabled Flexible Supercapacitors with 2.7 V Voltage and −40 °C Adaptability

“…Similar trends of R ct decrease were observed in other hydrogel electrolyte-based energy storage systems. , R ct reflects the contributions of both ion desolvation and the subsequent migration of ions through the interphase . The smaller R ct in the hydrogel electrolyte is probably due to that hydrogel electrolyte could promote the desolvation of hydrated ions. − Another advantage of hydrogel electrolyte over liquid electrolyte is that it endows the supercapacitor with low self-discharge (Figure S14). Compared with traditional aqueous liquid electrolytes, hydrogel electrolytes endow supercapacitors with their high mechanical safety, easy processability, good interfacial contact, and long durability in practical applications.…”

Salting-Out Effect Realizing High-Strength and Dendrite-Inhibiting Cellulose Hydrogel Electrolyte for Durable Aqueous Zinc-Ion Batteries

“…Owing to the salting-out effect mentioned above, after soaking in a concentrated acetate solution, the aggregation and crystallinity of CMC chains would be strengthened, which could significantly improve the mechanical properties. 24 In particular, the tensile strength of Con-CMC hydrogel electrolyte exceeds that of most recently reported hydrogel electrolytes for AZIBs, including poly-2acrylamido-2-methylpropanesulfonic/PAM hydrogel electrolyte (103 kPa), 40 chitosan/PAM hydrogel electrolyte (80 kPa), 41 polysaccharide hydrogel electrolyte (21 kPa), 42 zwitterionic osmolyte-based hydrogel electrolyte (61.8 kPa), 43 etc. Besides, the Con-CMC hydrogel electrolyte can sustain a large compressive strength (Figure S1a).…”

High ionic conductivity and toughness hydrogel electrolyte for high-performance flexible solid-state zinc-ion hybrid supercapacitors enabled by cellulose-bentonite coordination interactions

“…S5 †). Moreover, [34][35][36] synthetic polymer hydrogel electrolytes, 9,37 and zwitterionic polymer hydrogel electrolytes 38,39 reported in the literature on the basis of ionic conductivity and mechanical strength. The detailed comparison is summarised in Table S1.…”

“…(g) Zeta potential of cellulose, bentonite (BT), and the cellulose/BT slurry. (h) Comparison of the properties of the CBH-Zn with those of CH electrolytes,[34][35][36] synthetic polymer hydrogel electrolytes,9,37 and zwitterionic polymer hydrogel electrolytes38,39 reported in the literature on the basis of ionic conductivity and mechanical strength. The detailed comparison is summarised in TableS1.…”