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Spinel compound LiNi0.4Mn1.5Cr0.1O4 (LNMCO) and Li4Ti5O12 (LTO) were synthesized by the sol-gel method and the solid-state method, respectively. The particle sizes of the products LiNi0.4Mn1.5Cr0.1O4 and Li4Ti5O12 were 0.5 to 2 um and 0.5 to 0.8 um, respectively. All samples exhibited excellent electrochemical properties. A LiNi0.4Mn1.5Cr0.1O4/Li4Ti5O12 (LNMCO/LTO) cell was fabricated and was demonstrated to exhibit good electrochemical properties at the high current rate of 1 C. When the specific capacity was determined based on the mass of the LNMCO cathode, the LNMCO/LTO cell delivered 125 mAh g −1 at 1 C and 77 mAh g −1 at 5 C. The capacity retentions after 30 cycles were 94.4 % and 83.1 %, respectively.

Synthesis and Electrochemical Properties of Li 4 Ti 5 O 12 . -The title compound is prepared by ball-milling (MeOH medium, 300 rpm/min) of a stoichiometric mixture of Li2CO3 and anatase-type TiO2 followed by calcination (750°C, 24 h). The product shows good electrochemical properties with a discharge capacity reaching 160 mAh/g, and a capacity retention of 97% at the 50th cycle at 1C current rate. At a 10C rate, the first discharge capacity reaches 136 mAh/g with a capacity retention of 85% at the 50th cycle. -(LIU*, G. Q.; WEN, L.; LIU, G. Y.; WU, Q. Y.; LUO, H. Z.; MA, B. Y.; TIAN, Y. W.; J. Alloys Compd. 509 (2011) 22, 6427-6432, http://dx.

Zn2SnO4 is hydrothermally synthesized from aqueous solutions of SnCl4, ZnCl2, and N2H4 (autoclave, 180 °C, 24 h).