【摘要】 用微波—高分子网络法 ( m-p)合成掺杂 Li Lax Nd0 .0 0 6 - x Mn1 .994O4( x=0 .0 0 6,0 .0 0 4 ,0 .0 0 2 ,0 ) .XRD图显示用此法可制得晶型很好的样品 .充放电测试说明 Li Mn2 O4的特征容量为 1 2 0 m A/g,循环 2 0次后容量衰减率为 4 .7% .EIS和计时电量图说明掺 La的 Li Mn2 O4表层电阻小 ,而掺 Nd的 Li Mn2 O4的电导率高 .所以 ,将 La和 Nd以合适比例掺入 Li Mn2 O4中有可能提高材料的电导率和循环性能更多还原

【Abstract】 Doped LiLa x Nd 0.006- x Mn 1.994 O 4 ( x =0.006, 0.004, 0.002, 0) was prepared by microwave-polymer (m-p) network process. XRD showed the high crystallinity was obtained by m-p process. Cyclic voltammogram and charge/ discharge tests showed that the specific capacity of doped LiMn 2O 4 was 120mAh/g and capacity fade was 4.7% after 20 cycles. EIS and the chronoamperometric data showed the surface resistance of LiMn 2O 4 doped with La was little, while LiMn 2O 4 doped with Nd had better electric conductivity, so LiMn 2O 4 doped with the proper proportion of La and Nd had better cyclability and electric conductivity.更多还原