Improving the Electrochemical Performance of Li2ZnTi3O8 by Surface KCI Modification

Inorganic salt of KCI was first employed as an effective modifier to modify Li2ZnTi3O8 anode material via simply mixing in KC1 solution followed by sintering at 800 degrees C in air. The Li2ZnTi3O8 modified with 1.0 wt % KCl exhibited splendid rate capabilities (retaining reversible capacities of 225.6, 195.4, 178.0, 162.4, and 135.6 mAh g(-1) at 100, 200, 400, 800, and 1600 mA g(-1), respectively) and excellent long-term cycling stability (maintaining a capacity of 201.6 mAh g(-1) after 700 cycles). Combining structural characterization with electrochemical analysis, the KC1 modification leads to simultaneous doping of K+ and Cl- in Li2ZnTi3O8, contributing to enhance the electronic and ionic conductivities of Li2ZnTi3O8.