Application of Layered Titanates for Cathode of Lithium Battery

本文研究了层状晶体Cs_xTi_（2-X/4）O_4和K_xMn_xTi_<2-X>0_4作为锂离子电池正极材料的性能，发现<0.08><0.22><0.75>由K_<0.75>Mn_<0.75>Ti_<1.25>O_4（K_xMn_xTi_ 0_4中x=0.75<2-X>）衍生的K_ Li_ Mn_ O_4是一种有前途的正极材料<0.75><0.75><1.25>。所得的K_<0.08>Li_<0.22>Mn_<O.75>Ti_<l.25>0_4.1.2H_20含有层间水，其通过在空气中在250 ℃下或在真空中在150 ℃下加热而除去。结果表明，<0.08>K_Li_Mn_Ti_O_4<0.22><0.75><1.25>.在1.0-4.3V的电压范围内表现出130 mAh/g的可充电容量。

Layer structured crystals of Cs_XTi_<2-X/4>O_4 and K_XMn_XTi_<2-X>0_4 have been studied as cathode materials for lithium batteries, In the course of the present study, it was found that K_<0.08>Li_<0.22>Mn_<0.75>O_4 derived from K_<0.75>Mn_<0.75>Ti_<1.25>O_4 (x=0.75 in K_XMn_XTi_<2-X>0_4) is a promising cathode material.K_<0.75>Mn_<0.75>Ti_<1.25>O_4 was oxidized by KmnO_4 solution of sulfuric acid, followed by lithium ion exchange in an aqueous solution. The resulting K_<0.08>Li_<0.22>Mn_<O.75>Ti_<l.25>0_4.1.2H_20 contains interlayer water which is removed by heating at 250ﾟC in air or at 150ﾟC in vacuo. It was shown that K_<0.08>Li_<0.22>Mn_<0.75>Ti_<1.25>O_4. exhibits 130 mAh/g rechargeable capacity in the voltage range of 1.0-4.3V.