Owning to their high energy density and long cycle life, lithium-ion batteries (LIBs) are widely acknowledged as the most reliable portable energy storage technologies; however, the extensive applications of LIBs have led to the drastic surge of lithium prices over the past decade. As a result, research on alternate secondary batteries has gained traction in recent years. Calcium-ion batteries (CIBs) are appealing future energy storage candidates due to calcium's natural abundance, low redox potential, and great volumetric capacity. So far, research on CIBs has greatly been hampered by the lack of a reliable and universal electrolyte like the LiPF6/EC/DEC system for LIBs. Aqueous electrolytes for CIBs have displayed limited voltage range and severe safety concerns, while organic electrolytes suffered from extremely low cycle life. This study modulated a hybrid electrolyte to combine the positive qualities of aqueous and organic electrolytes while mitigating the downsides. The best hybrid candidate, Ca(ClO4)2/(H2O)3.0(AN)4.8, demonstrated a wide stability window (3.1V) and facile insertion of calcium-ion into Prussian green host materials, leading to impressive capacity retention over an extended cycle life of 1000 cycles. Furthermore, 3D nickel foam with microporous structures was employed as the current collector to accommodate 3-8 times the active mass of conventional foil collectors.