(Me=Ti，F(xiàn)e，Ni)的制備與表征
(東北大學(xué) 材料與冶金學(xué)院，沈陽(yáng) 110004)
摘 要: 在合成純相尖晶石型錳酸鋰的基礎(chǔ)上，采用固相分段法制備了錳酸鋰派生物L(fēng)iMn1.75Ti0.25O4，LiMn1.75Fe0.25O4和LiMn1.75Ni 0.25O4。用XRD，SEM和粒度測(cè)試儀分別對(duì)試樣進(jìn)行了表征。電化學(xué)檢測(cè)表明，F(xiàn)e和Ni元素能夠提高錳酸鋰的放電平臺(tái)電壓，Ti元素不能改善錳酸鋰的電化學(xué)性能。從結(jié)構(gòu)化學(xué)角度初步探討了Fe，Ni和Ti元素對(duì)純相尖晶石型錳酸鋰結(jié)構(gòu)的影響。
關(guān)鍵字: 鋰離子電池；正極材料；錳酸鋰；派生物
LiMn1.75Me0.25O4 (Me=Ti, Fe, Ni) for
lithium-ion battery cathode material
（School of Materials and Metallurgy, Northeastern University,
Shenyang 110004, China）
Abstract:On the basis of synthesizing pure spinel type lithium manganese oxides, the derivations such as LiMn1.75Ti0.25O4, LiMn1.75Fe0.25O4 and LiMn1.75Ni0.25O4 were prepared by using solid-step-sintering method. The structures were characterized by means of XRD, SEM and particle analyzer. The electrochemical measurement results show that the element of iron or nickel can raise the discharging plateau voltage of LiMn2O4, while element titanium destroys the electrochemical property of LiMn2O4. The influence of elements of iron, nickel and titanium on the structure of LiMn2O4 pure phase was discussed in the viewpoint of structural chemistry.
Key words: lithium-ion battery; cathode material; lithium manganate; derivations
