A newly developed crystalline-glass mesoporous nanocomposite (CGMN) TiO₂-P₂O₅ has been applied to a negative electrode of lithium rechargeable battery. The transport of lithium ions (Li⁺) and electrolyte solution is facilitated by oriented nano-channel structures. The chemical adsorption/desorption of lithium ion at enormous surface area of the nano-channels realizes super-capacitor function to ensure high energy density as comparable to conventional lithium rechargeable batteries and to upgrade the power density by two orders of magnitude or more. Furthermore, providing electronic conduction property to the framework by incorporating electronic conductive oxides into the framework of TiO₂-P₂O₅ CGMN significantly improves charge-discharge characteristics.