多孔氧化镁对热电池安全性能的影响  

Effect of porous MgO on safety performance of thermal batteries

作　　者：吴启兵 向斌[3] 魏俊华 王毅 WU Qi-bing;XIANG Bin;WEI Jun-hua;WANG Yi(State Key Laboratory of Advanced Chemical Power Sources,Zunyi Guizhou 563003,China;Guizhou Meiling Power Sources Co.Ltd.,Zunyi Guizhou 563003,China;School of Chemistry and Chemical Engineering,Chongqing University,Chongqing 401331,China)

机构地区：[1]特种化学电源国家重点实验室,贵州遵义563003 [2]贵州梅岭电源有限公司,贵州遵义563003 [3]重庆大学化学化工学院,重庆401331

出　　处：《电源技术》2019年第11期1855-1859,共5页Chinese Journal of Power Sources

摘　　要：通过离心加速度的方法系统地研究了多孔氧化镁视比容和添加量对热电池性能的影响,研究发现:MgO的视比容对常温静态放电性能无影响,但是在高温加速度作用下,当MgO视比容低于8 mL/g时,电池安全性能差。热电池用隔膜中MgO的最佳质量分数为40%,内阻为50~100 m W。首次通过X射线衍射(XRD)、电子扫描显微镜(SEM)等方法全面地表征了MgO微观结构和表面形貌,有力地证明了MgO利用孔洞结构吸附电解质的过程机理,并确定了热电池用多孔MgO的选用方法。The effects of specific volume and addictive of porous MgO on the performance of thermal batteries were invested systematically by a centrifugal acceleration method in this paper.The results show that specific volume of porous MgO has little effect on the safety performance of thermal batteries,but the thermal batteries show inferior safety performance when the batteries are discharged at high temperature acceleration and specific volume of less than 8 mL/g.The optimum mass rate value of porous MgO in the separation is 40%,with resistance about 50-100 m W.In this paper,the microstructure and morphology of porous MgO were characterized by X-ray diffraction and secondary election microscope analysis for the first time.The results firmly certificate that the porous structure of MgO absorbes the electrolyte in the discharge process,and provide the selection of porous MgO in the thermal batteries.

关 键 词：热电池 多孔氧化镁 视比容 离心加速度 

分 类 号：TM911[电气工程—电力电子与电力传动]