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来源：百度文库编辑：高校问答时间：2024/04/29 05:55:49

本文以共沉淀法合成微米级的带毛絮的碳酸锂（Li2CO3）和碳酸锰（MnCO3）球为前驱物通过高温煅烧而制备出多孔球状的尖晶石型LiMn2O4作为锂离子电池的正极材料，同时通过对前驱物加表面活性剂的改性，分散多孔球而成为纳米粒子。利用XRD、TEM和FESEM的手段对产物的物相及形貌进行表征，并探讨形成这种物相和形貌的机理。
对450℃、550℃和650℃温度下合成LiMn2O4的微米级多孔球和纳米粒子分别进行电化学性能测试，循环伏安和交流阻抗实验。测试结果表明，产物的电化学性能随着温度的升高变好。并且详细探讨了材料的阻抗与其充放电容量之间的关系。

This article (Li2CO3) and the manganese carbonate (MnCO3) the ball burns take the co-precipitation law synthesis micron level belt lithium carbonate as the forerunner through the high temperature prepares porous spherical spinel LiMn2O4 to take the lithium ion battery the positive electrode material, simultaneously through adds the surface active agent to the forerunner the modification, the disperser porous ball becomes a nanometer granule. Using XRD, TEM and the FESEM method carries on the attribute to the product phase and the appearance, and the discussion forms this kind of phase and the appearance mechanism.

For 450 ℃, 550 ℃ and 650 ℃ temperatures under synthesizes LiMn2O4 the micron level porous ball and a nanometer granule separately carries on the electrochemistry performance test, the circulation volt-ampere and the alternating-current impedance experiment. The test result indicated that, the product electrochemistry performance elevates along with the temperature improves. And in detail has discussed the material impedance if between the sufficient discharge capacity relations.

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