Zinc-ion batteries have a huge potential to replace lithium-ion batteries due to their abundant resources and high safety. However, their cyclic stability and energy density need to be improved to compete with lithium-ion batteries. To bridge this gap, research is being done on electrode material, electrolyte, and cell design. Herein, we designed a highly ionic conductive and stable electrolyte, which we accomplished by creating a hydrogel carefully engineered using the water-in-salt electrolyte concept. This eventually led to achieve long-life cycle platting/stripping of Zn. Later, we demonstrated a zinc-Lignin battery having good capacity and cyclic stability.