摘要
采用碱式碳酸镁、乙酸锰、柠檬酸铁铵为原料,硬脂酸、无水乙醇作为分散剂,在氮气保护氛围下,用高温固相热结晶法制备了掺杂过渡金属元素铁(亚铁离子)的镁离子锰系电池正极材料。采用X射线衍射(XRD)、扫描电镜(SEM)、热重分析(TGA)对不同温度下的电池正极材料进行了表征与分析,并组装纽扣电池进行电池性能测试。试验结果显示,煅烧温度在800℃时,样品Mg_2Fe_(0.25)MnO_4的热结晶状态较为理想,颗粒粒径小且均匀。在0.3～2.1V电压范围内,当充放电电流为0.025mA时,首次放电比容量为82mAh/g。
Under the protection of nitrogen, the doping transition metal iron （ferrous ion） of magnesium ion battery manganese cathode materials was prepared by the method of high-temperature solid-state thermal crystallization with basic magnesium carbonate, manganese acetate and ferric citrate as raw materials and stearic acid and anhydrous ethanol as dispersants. The battery cathode materials at different temperatures were characterized and analyzed by X-ray diffraction （XRD）, scanning electron microscopy （SEM） and thermogravimetric analysis （TGA）, and then the assembled button battery was tested to study the performance. The test results showed that when the calcining temperature was 800 ℃, the thermal crystallization of the sample Mg 2Fe 0.25 -MnO 4 was more ideal, and the particle size was small and uniform. In the 0.3-2.1 V voltage range, when the charge and discharge current was 0.025 mA, the first discharge capacity of 82 mAh/g could be obtained.
作者
江津河
马欣欣
刘方旺
江冠禹
曹长青
JIANG Jinhe;MA Xinxin;LIU Fangwang;JIANG Guanyu;CAO Changqing(Department of Chemistry,Chemical Engineering and Environmental Engineering,Weifang University,Weifang 261061,China;Department of Chemical Engineering,Qingdao University of Science and Technology,Qingdao 266042,China;Department of International Business School,Shandong Vocational College of Foreign Affairs Translation,Weihai 264504,China)
出处
《功能材料》
EI
CAS
CSCD
北大核心
2018年第11期11014-11017,共4页
Journal of Functional Materials
基金
国家自然科学基金资助项目(51541205)
