| abstract |
An active material for a battery that can be applied to an aqueous lithium secondary battery having a small environmental load and that has an aqueous electrolyte, and can exhibit excellent charge / discharge cycle characteristics, and the active material for the battery To provide an aqueous lithium secondary battery using A battery active material comprising a titanium pyrophosphate compound having a basic composition of (TiO) 2 P 2 O 7 as a main component. Moreover, it is the aqueous lithium secondary battery 1 containing the positive electrode 2 containing a positive electrode active material, the negative electrode 3 containing a negative electrode active material, and the aqueous solution electrolyte formed by melt | dissolving lithium salt in water. In the water based lithium secondary battery 1, the negative electrode active material is mainly composed of a titanium pyrophosphate compound having (TiO) 2 P 2 O 7 as a basic composition. In addition, the positive electrode active material is mainly composed of a material in which insertion and desorption of Li are performed with a noble potential from the titanium pyrophosphate compound. [Selection] Figure 2 |