基于钴酸锰纳米笼材料作为超级电容器电极材料的研究
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- 英文论文题名：High-performance Supercapacitors Based on MnCo_2O_4 Nanocages
- 论文作者：董艳影 ; 胥亚楠 ; 王迎 ; 陈程成 ; 焦丽芳 ; 王一菁
- 英文论文作者：Yanying Dong ; Yanan Xu ; Ying Wang ; Chengcheng Chen ; Lifang Jiao ; Yijing Wang ; College of Chemistry ; Institute of Applied Chemistry ; Nankai University
- 年：2016
- 作者机构：南开大学;
- 论文关键词：超级电容器 ; 钴酸锰 ; 电极材料 ; 金属有机框架 ; 纳米笼
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第三十分会：化学电源
- 语种：中文
- 分类号：TM53;TQ137.12
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第三十分会 ; 化学电源
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：290k
- 原文格式：D
- 会议级别：全国
摘要
过渡金属氧化物作为超级电容器的电极材料可展现出良好的电化学性能,其中钴酸锰是最具有潜力的材料之一。~1它结合了钴、锰两种过渡金属氧化物的优点,具有更高的理论容量、更好的导电性和电化学活性。该文中,我们报道了一种用金属有机物框架(Mn-Co-ZIFs)做前驱体与模板合成多孔的MnCo_2O_4纳米笼的方法。~(2-3)该方法合成的MnCo_2O_4中空纳米结构,保持了前驱体的多面体结构,其比表面积可达117 m~2g~(-1)。在恒电流条件下对该电极材料进行测试(如图1a),电流为1 Ag~(-1)时,最高放电比容量可达1763 F g~(-1),循环4500周后,容量保持率为95%;当电流增加到10 A g~(-1)时,比容量仍能达到840 F g~(-1)。该MnCo_2O_4纳米材料优异的电化学性质主要依赖于该材料在循环过程中保持的中空纳米结构,用两个超级电容器组成一个简单的电化学设备,可以点亮红色LED灯(如图1b)。
Cobaltite(MnCo_2O_4) is one of the most promising candidate for supercapacitors with advantages of higher theoretical capacity,better conductivity and better electrochemical activity.~(1-3) We report a simple synthesis route of MnCo_2O_4 nanocages by using a metal-organic frameworks(Mn-Co-ZIFs) as precursor and template.The Brunauer-Emmett-Teller(BET) surface area of MnCo_2O_4 nanocages is 117 m~2 g~(-1).MnCo_2O_4 electrode show enhanced capacitance performance with a specific capacities of 1763 F g~(-1) and 840 F g~(-1) at 1 and 10 A g~(-1),respectively(Figure 1a).After 4500 cycles at 1 A g~(-1),the MnCo_2O_4 electrode show a capacity retention of 95%,which demonstrates its superior cyclic stability.The high-performance of the MnCo_2O_4 nanocage can be attributed to its unique hierarchical hollow structure,and the hollow structure has been maintained during the electrochemical cycling.We assembled two supercapacitors on series,and after charging the devices could round light-emitting diode(LED) indicators(Figure 1b).
Cobaltite(MnCo_2O_4) is one of the most promising candidate for supercapacitors with advantages of higher theoretical capacity,better conductivity and better electrochemical activity.~(1-3) We report a simple synthesis route of MnCo_2O_4 nanocages by using a metal-organic frameworks(Mn-Co-ZIFs) as precursor and template.The Brunauer-Emmett-Teller(BET) surface area of MnCo_2O_4 nanocages is 117 m~2 g~(-1).MnCo_2O_4 electrode show enhanced capacitance performance with a specific capacities of 1763 F g~(-1) and 840 F g~(-1) at 1 and 10 A g~(-1),respectively(Figure 1a).After 4500 cycles at 1 A g~(-1),the MnCo_2O_4 electrode show a capacity retention of 95%,which demonstrates its superior cyclic stability.The high-performance of the MnCo_2O_4 nanocage can be attributed to its unique hierarchical hollow structure,and the hollow structure has been maintained during the electrochemical cycling.We assembled two supercapacitors on series,and after charging the devices could round light-emitting diode(LED) indicators(Figure 1b).
引文
[1]Gao G.X.;Lu S.Y,Dalton Transactions.2015,44,18737.
[2]Y.Y.Fu,X.Lu,Applied Surface Science.2015,357,2013.
[3]W.Y.Li,K.B.Xu,CrystEngComm.2014,16,2335.
[2]Y.Y.Fu,X.Lu,Applied Surface Science.2015,357,2013.
[3]W.Y.Li,K.B.Xu,CrystEngComm.2014,16,2335.