Application of Layered Titanates for Cathode of Lithium Battery

本文对层状晶体Cs_xTi_&lt；2-X/4&gt；O_4和K_xMn_xTi_&lt；2-X&gt；0_4作为锂电池正极材料进行了研究，发现K_&lt；0.08&gt；Li_&lt；0.22&gt；Mn_&lt；0.75&gt；O_4来源于K_&lt；0.75&gt；1.25&gt；O_4(x=0.75in K_xMn_xTi_t；2-X&gt；0_4)是一种很有前途的正极材料，material.K_&lt；0.75&gt；Mn_&lt；0.75&gt；Ti_&lt；1.25&gt；O_4在KMnO_4的硫酸溶液中被氧化，然后在水溶液中被锂离子交换。生成的K_&lt；0.08&gt；Li_&lt；0.22&gt；Mn_&lt；O.75&gt；Ti_&lt；l.25&gt；0_4.1.2H_20包含层间水，可通过在空气中以250ﾟC或在真空中以150ﾟC加热来去除。结果表明，K_&lt；0.08&gt；Li_&lt；0.22&gt；Mn_&lt；0.75&gt；Ti_&lt；1.25&gt；O_4.在1.0-4.3V电压范围内具有130mAh/g的充电容量。

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.