结晶度与粘合剂对多孔钴酸镁超电容电极能量传递效率的影响 |
Influence of Crystallinity and Binder on the Energy Delivery Efficiency for Porous Magnesium Cobaltate Supercapacitor Electrodes |
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摘要: 通过热解晶态的双金属配位聚合物前驱体得到镁/钴三元氧化物、多孔MgCo2O4纳米结构。研究表明,不同的水热反应时间产生具不同结晶度的同构前驱体,并且当热解温度与粘合剂分别选择500℃和聚四氟乙烯(PTFE)时,便可以获得具有好的能量传递效率(η)的最优电容量。相应的具有高比表面积与适中结晶度的MgCo2O4电极材料具有最大电容量(348 F·g-1),η值可达92.9%,经历1 000次循环后电容量保持率为93.7%的优异电化学性能。 |
关键词: 配合物粒子 传输效率 钴酸镁 粘合剂 电容量 |
基金项目: 中央高校基础研究基金(No.KYZ201540)和南京农业大学科研(No.050804087)资助项目。 |
Abstract: The magnesium/cobalt ternary oxide, porous MgCo2O4 nanostructures were synthesized by thermal decomposition of crystalline bimetallic coordination polymer precursors. As a result, various hydrothermal reaction time results in isostructural precursors with different crystallinity. When the pyrolysis temperature and binder are chose to be 500℃ and PTFE respectively, the superior practical capacitance with good energy delivery efficiency (η) is obtained. The corresponding MgCo2O4 electrode with high surface area and moderate crystallinity achieves a largest specific capacitance of 348 F·g-1, maximum η value (92.9%) and 93.7% of capacitance retention after 1 000 continuous charge-discharge cycles. |
Keywords: coordination polymer particles deliverable efficiency MgCo2O4 binder capacitance |
投稿时间:2017-10-18 修订日期:2018-03-22 |
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罗雪飞,郭蕾,魏倩倩,徐江艳,汪快兵,吕波.结晶度与粘合剂对多孔钴酸镁超电容电极能量传递效率的影响[J].无机化学学报,2018,34(5):823-833. |
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