Li4Ti5O12 (LTO) has drawn great attention due to its safety and stability in lithium-ion batteries (LIBs).However,high potential plateau at 1.5V vs.Li reduces the cell voltage,leading to a limited use of LTO.Dual-ion batteries (DIBs) can achieve high working voltage due to high intercalation potential of cathode.Herein,we propose a DIB configuration in which LTO is used as anode and the working voltage was 3.5V.This DIB achieves a maximum specific energy of 140Wh/kg at a specific power of 35W/kg,and the specific power of 2933W/kg can be obtained with a remaining specific energy of 11 Wh/kg.Traditional LIB material shows greatly improved properties in the DIB configuration.Thus,reversing its disadvantage leads to upgraded performance of batteries.Our configuration has also widened the horizon of materials for DIBs.