[1]代 芳,朱杨军,李 平,等.纳米K-MnO2嵌入化合物的制备与电化学性能研究[J].江西师范大学学报(自然科学版),2016,40(06):551-555.
 DAI Fang,ZHU Yangjun,LI Ping,et al.The Preparation and Electrochemical Performance of Nanostructured K-MnO2 Intercalation Compound[J].,2016,40(06):551-555.
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纳米K-MnO2嵌入化合物的制备与电化学性能研究()
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《江西师范大学学报》(自然科学版)[ISSN:1006-6977/CN:61-1281/TN]

卷:
40
期数:
2016年06期
页码:
551-555
栏目:
出版日期:
2016-12-01

文章信息/Info

Title:
The Preparation and Electrochemical Performance of Nanostructured K-MnO2 Intercalation Compound
作者:
代 芳朱杨军李 平余 敏索晓燕章 磊温祖标
1.南昌工程学院江西省精密驱动与控制重点实验室, 江西 南昌 330099; 2.江西师范大学化学化工学院,江西 南昌 330022
Author(s):
DAI FangZHU YangjunLI PingYU MinSUO XiaoyanZHANG LeiWEN Zubiao
1.Jiangxi Province Key Laboratory of Precision Drive & Control,Nanchang Institute of Technology,Nanchang Jiangxi 330099,China; 2.College of Chemistry and Chemical Engineering,Jiangxi Normal University,Nanchang Jiangxi 330022,China
关键词:
K-MnO2 嵌入化合物 电极材料 嵌入-脱嵌反应 超级电容器
Keywords:
K-MnO2 intercalation compound electrode material insertion-deinsertion reaction supercapacitor
分类号:
O 657.1
摘要:
在冰浴条件下,以KMnO4、KOH和MnCl2为反应物,采用液相化学共沉淀法制备了层状δ-MnO2宿主,然后以KOH为嵌入离子源,采用水热沉淀法,制备了纳米 K-MnO2嵌入化合物.分别采用X-射线衍射光谱和扫描电子显微镜等物理方法对试样的晶体结构和表面形貌进行表征; 用循环伏安、恒流充放电和交流阻抗等电化学方法研究其电化学性能.结果表明,纳米K-MnO2嵌入化合物在1 mol·L-1 的KOH、NaOH 和 LiOH 电解液中发生了相互协同的氧化-还原反应和嵌入-脱嵌反应,在相同的扫描速率或电流密度下比电容的大小关系分别为KOH>NaOH>LiOH,在600次循环充放电中展现出了良好的循环稳定性,意味着这种嵌入化合物K-MnO2是一种很有前途的水系混合超级电容器的正极材料.
Abstract:
In this paper,layered δ-MnO2 host was synthesized with liquid chemical coprecipitation method by using KMnO4,KOH and MnCl2 reactants at 0 ℃.Nanostructured K-MnO2 intercalation compound was prepared by hydrothermal method treated the mixture of δ-MnO2 as host and KOH as intercalation ion scourse at 180 ℃ for 2 day.X-ray diffraction,scanning electron microscopy were used to investigate crystal structure,morphology of the K-MnO2 intercalation compounds,respectively.The electrochemical properties were evaluated by cyclic voltammetry,galvanostatic charge/discharge and electrochemical impedance spectroscopy,etc.The results show that nanostructured K-MnO2 intercalation compound presents the synergistic effects of oxidation-reduction reaction and insertion-deinsertion reaction in 1 mol·L-1 KOH,NaOH and LiOH electrolyte,and the specific capacitance of K-MnO2 is in the order of KOH>NaOH>LiOH at same scan rate or current density,respectively.Exhibiting excellent 600-cycle charge-discharge in 1 mol·L-1 KOH electrolyte,which indicate that the as-prepared K-MnO2 intercalation compound would be as a promising cathode materials for aqueous hybrid supercapacitors.

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备注/Memo

备注/Memo:
收稿日期:2016-08-06基金项目:国家自然科学基金(21463013)和江西省自然科学基金(20142BAB203013)资助项目.通信作者:章 磊(1968-),女,江西南昌人,副教授,硕士,主要从事电化学研究.
更新日期/Last Update: 1900-01-01