重质化学二氧化锰制备尖晶石锰酸锂
发布时间：2019-02-16 03:12
【摘要】：采用重质化学二氧化锰制备尖晶石LiMn2O4。采用X射线衍射、扫描电镜、恒电流充放电等技术对合成产物进行物相、形貌和电化学分析。结果表明:采用重质化学二氧化锰与电解二氧化锰制备的LiMn2O4粉末具有相似的X射线衍射结果。采用重质化学二氧化锰制备的LiMn2O4在0.2C、0.5C、1C、2C及3C放电倍率下放电比容量分别为108.5、104.7、97.3、86.5mA·h/g和70.7mA·h/g,以电解二氧化锰为原料制备的LiMn2O4放电比容量则分别为106.1、103.4、99.1、89.2mA·h/g和75.5mA·h/g。两种原料制备的LiMn2O4在不同倍率下的比容量和充放电循环性能差别不大,采用重质化学二氧化锰制备的锰酸锂电化学性质可以达到或超过采用电解二氧化锰制备的锰酸锂。
[Abstract]:Preparation of spinel LiMn2O4. by heavy Chemical Manganese dioxide The phase, morphology and electrochemical analysis of the synthesized products were carried out by X-ray diffraction, scanning electron microscopy and constant current charge and discharge techniques. The results show that the LiMn2O4 powder prepared by heavy chemical manganese dioxide and electrolytic manganese dioxide has similar X-ray diffraction results. The specific discharge capacity of LiMn2O4 prepared by heavy chemical manganese dioxide at the discharge rate of 0.2Cn0.5Cn1C2C and 3C is 108.5104.7U 97.3 渭 m / g and 86.5mA / g, respectively, and the specific discharge capacity of LiMn2O4 is 86.5mA / g and 70.7mA / g, respectively. The specific discharge capacity of LiMn2O4 prepared from electrolytic manganese dioxide was 106.1103.4 渭 m / g and 89.2mA / g, respectively. The specific capacity and charge-discharge cycle performance of LiMn2O4 prepared by the two kinds of raw materials are not different at different rates. The electrochemical properties of lithium manganese oxide prepared by heavy chemical manganese dioxide can reach or exceed those prepared by electrolytic manganese dioxide.
【作者单位】： 吉首大学化学化工学院;湘西自治州矿产与新材料技术创新服务中心;
【基金】：国家自然科学基金(21263004) 湖南省高校科技创新团队支持计划资助~~
【分类号】：TM912.9
本文编号：2423983
[Abstract]:Preparation of spinel LiMn2O4. by heavy Chemical Manganese dioxide The phase, morphology and electrochemical analysis of the synthesized products were carried out by X-ray diffraction, scanning electron microscopy and constant current charge and discharge techniques. The results show that the LiMn2O4 powder prepared by heavy chemical manganese dioxide and electrolytic manganese dioxide has similar X-ray diffraction results. The specific discharge capacity of LiMn2O4 prepared by heavy chemical manganese dioxide at the discharge rate of 0.2Cn0.5Cn1C2C and 3C is 108.5104.7U 97.3 渭 m / g and 86.5mA / g, respectively, and the specific discharge capacity of LiMn2O4 is 86.5mA / g and 70.7mA / g, respectively. The specific discharge capacity of LiMn2O4 prepared from electrolytic manganese dioxide was 106.1103.4 渭 m / g and 89.2mA / g, respectively. The specific capacity and charge-discharge cycle performance of LiMn2O4 prepared by the two kinds of raw materials are not different at different rates. The electrochemical properties of lithium manganese oxide prepared by heavy chemical manganese dioxide can reach or exceed those prepared by electrolytic manganese dioxide.
【作者单位】： 吉首大学化学化工学院;湘西自治州矿产与新材料技术创新服务中心;
【基金】：国家自然科学基金(21263004) 湖南省高校科技创新团队支持计划资助~~
【分类号】：TM912.9
【共引文献】
相关硕士学位论文 前3条
1 魏秀格;特殊微纳米结构的氧化锰合成和对尖晶石LiMn_2O_4结构、形貌和电性能的影响[D];河南师范大学;2013年
2 李长安;四氧化三锰的制备及吸附性能研究[D];吉首大学;2013年
3 刘帅;静电纺丝法制备无机纳米纤维及其性能研究[D];青岛大学;2014年
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