Currently, all types of vehicles utilize a 12 volt lead-acid battery for start-stop, controls, comfort features, redundancy, and safety features. We aim to replace it by introducing a new rechargeable hybrid aqueous battery, which is lead-free and possesses more than twofold higher energy storage capacity. There are requirements to further improve the rate capability and to reduce water-loss of this battery. In this proposed research, we will use nanotechnology to re-design the cathode materials and electrode structures to improve the rate capability.