The spinel Li_4Ti_5O_(12) is so-called zero-strain insertion material as thenegative-electrode material of lithium secondary batteries. That is because thestructure does not vary during the insertion/extraction of lithium ions. The spinelLi_4Ti_5O_(12), owning to its advantages such as zero-stain, low-cost, environmentalfriendliness, excellent electrochemical properties and high safety, is widelyconsidered to be a promising and abundantly existing anode material for lithiumsecondary batteries. Although this...