随着信息技术的快速发展，用电器对电池的需求也H益增长，尤其是对高能量高功率电池的需求，而普通碱性电池显然无法满足这种要求。本文作者在围内率先成功研制了采用改性Fes2作为正极材料的AA型高能量高功率Li/FeS2电池。天然Fes2经过研磨、焙烧和酸洗，可最终制得改性FeS2、讨论了天然及改性Fes2的化学成分、物理性质和结构特征，并分别测试二者组装成钾电池的放电容址。研究结果，发现：FeS2的纯度、颗粒大小是影响Li/FeS2电池电化学性能的重要因素。在此基础上，对比了AA型Ij/Fe岛电池与同型碱性电池的放电性能。Li/FeS2电池的整个制备过程完全满足环保的要求。研究表明：Li/FeS2电池是一种绿色、高功率的新型能源，具有广泛的应用前景。

SEM). The electrochemical properties of composite electrolyte membranes were studied. The ionic conductivityof the polymer electrolyte composed of 75wt. % 1MLiBF4 in ethylene carbonate (EC) and dimethyl carbonate (DMC) (EC:DMC=1:1by weight) was about 2.6×10−3 S cm−1 at ambient temperature. The electrochemical window of the polymer electrolyte was about 4. 6Vdetermined from the linear sweep voltammetry plot. The lithium ion polymer batteries were assembled by sandwiching gel polymer electrolytebetween LiCoO2 cathode and mesophase carbon fibre (MPCF) anode. Charge-discharge test results display that lithium ion batteries withthese gel polymer electrolytes have good electrochemical performance.

采用高温固相法合成了复合离子掺杂的尖晶石型锰酸锂Li1.02CrCoLacMnz a b cd F2O4-Y（a， b，c=0，0.01，0.02；y=0，0.02）正极材料。XRD表征合成物均具有良好的尖晶石型结构。充放电表明多元复合掺杂产物Li1.02Cr0.02La0.01Mn1.96F0.02O3.98，作为锂离子电池正极材料较未掺杂或仅掺杂阳离子的材料能够更好地抑制可逆容量在充放电循环中的衰减，80次循环充放电比容量（120.1～113.5mAh•g）仍保持94.5%以上。高温（55℃）循环性能也有较大的改善。交流阻抗测试结果表明该材料在充放电平台附近有较小的阻抗和良好的充放电可逆性。

Spinel LiMn2O4 powders were prepared using two•step synthesis method consisting of、solidstate reaction method and citrate modified solgel method. The effects of the calcination temperature and the Li/Mn ratio ofraw materials were studied on the physic0chemical and electrochemical properties of the spinel LiMmO4 powders, such as crystallinity. 1attice constant and density. The title compound was characterized by powder X•ray diffraction(XRD), scanning electron microscopy(SEM)and transmission electron microscopy(TEM). Polycrystalline LiMn204 powers calcined at 750 c(=were found to be composed of very uniformlysized microcrvstal with an aver. age particle size of 300nm. The improvement in electrochemical properties was mainly attributed to the process of re. grinding by absolute alcoho1.

尖晶石型锰酸锂是最有希望替代LiCx，02、LiNi02成为锂离子电池正极的材料。根据掺杂元素的性质从阴离子掺杂、阳离子掺杂和复合掺杂几个方面综述了近年来锂离子电池正极材料尖晶石型LiMn204的掺杂改性的研究成果，并对该材料的未来发展进行了展望。