Here we report a novel lithium–selenium (Li–Se) battery with hybrid electrolytes that permit fast solution-phase Li–Se redox reactions, eliminate polyselenides-shuttling and suppress the formation of lithium dendrite. The hybrid electrolytes consist of NASICON-type Li1.5Al0.5Ge1.5 (PO4)3 (LAGP) ceramics sandwiched by tetraethylene glycol dimethyl ether (TEGDME) electrolyte, enabling the use of low-cost and highly-scalable carbon, demonstrating full utilization of the Se cathode (e.g., 677mAhg−1 at 0.1C (100% of theoretical capacity)), superior cycling stability (e.g., 613mAhg−1 over 500 cycles at 0.8C, fading rate=0.008% per cycle), and promising rate capabilities (e.g., 540mAhg−1 at 1.5C). With the hybrid electrolytes, we further demonstrate a high Se loading of 5.9mgcm−2 with a stable discharge capacity of 454mAhg−1 (2.68mAhcm−2). Our work demonstrates that combining solid state electrolyte with liquid glyme electrolyte is key to achieve stable and high-performance Li–Se batteries.