Integrating Electric Ambipolar Effect for High-Performance Zinc Bromide Batteries

• Electric ambipolar effect motivates strong dipole interactions reorganized primary cations solvation sheath. • Electrostatic shielding homogenized the distribution for nucleated Zn and facilized the orientated Zn deposition. • The eutectic network of Zn2+ ternary hydrated eutectic electrolytes enables highly reversible and noteworthy Br2/Br− reaction kinetics. • The ZTE electrolyte achieves a broadened electrochemical window of 2.9 V and enables Zn anode plating/stripping reversibly for over 2400 h.