热电池用LiMn_2O_4正极材料的制备及性能研究  

Performance study of LiMn_2O_4 for thermal batteries

作　　者：卢财财 曹晓晖[1] 杨少华[1] 白银祥 赵彦龙 

机构地区：[1]沈阳理工大学环境与化学工程学院,辽宁沈阳110159 [2]北方特种能源集团西安庆华公司,陕西西安710025

出　　处：《电源技术》2016年第11期2189-2191,共3页Chinese Journal of Power Sources

摘　　要：通过高温固相法合成LiMn_2O_4正极材料,采用X射线衍射光谱法(XRD)、扫描电子显微镜法(SEM)和激光粒度分布仪对其结构和形貌进行表征。将正极材料、Li Si合金粉和Li_2SO_4-Li_2CO_3-Li_3PO_4-Li F四元电解质运用粉末压片工艺制备单体电池,研究正极掺杂电解质对放电性能的影响。实验结果表明掺杂电解质为20%(质量分数)的正极材料具有优良的放电性能。其单体电池以30 m A/cm2恒流放电,放电起始电压为2.802 V,截止电压为2 V时,放电时间达到42.48min,比容量188.7 m Ah/g。The LiMn204 cathode material was synthesized by high temperature solid phase sintering and its structure and morphology were characterized by X-ray diffraction （XRD）, scanning electron microscopy （SEM） and laser particle size distribution analyzer. Single cell was composed of LiMn204 cathode, LiSi alloy anode and Li2SO4-Li2CO3-Li5PO4-LiF electrolyte pellets made by cold press. The discharge performance of the LiMn204 with varied electrolyte content in the cathode was studied. The results show that the prepared LiMn204 with the addition of 20 wt% electrolyte has high discharge performance. At a current densitiy of 30 mA/cm2, the cell voltage could reach 2.802 V and discharge time to reach 42.48 min with the specific capacity of 188.7 mAh/g with the cut-off voltage of 2V.

关 键 词：热电池 LIMN2O4 电解质 放电性能 

分 类 号：TM91[电气工程—电力电子与电力传动]