[1]黄庆元,张加荣,代 芳,等.δ-MnO2纳米线的制备与电化学性能[J].江西师范大学学报(自然科学版),2018,(02):160-165.[doi:10.16357/j.cnki.issn1000-5862.2018.02.08]
　HUANG Qingyuan,ZHANG Jiarong,DAI Fang,et al.The Preparation and Electrochemical Performance of δ-MnO2 Nanowire[J].Journal of Jiangxi Normal University:Natural Science Edition,2018,(02):160-165.[doi:10.16357/j.cnki.issn1000-5862.2018.02.08]
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δ-MnO2纳米线的制备与电化学性能()
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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:
期数:
2018年02期
页码:
160-165
栏目:
化学与生命科学
出版日期:
2018-04-20

文章信息/Info

Title:
The Preparation and Electrochemical Performance of δ-MnO2 Nanowire
文章编号:
1000-5862(2018)02-0160-06
作者:
黄庆元1; 张加荣1; 代 芳2; 王君熠1; 李 平1; 章 磊1*; 温祖标1*
1.江西师范大学化学化工学院,江西 南昌 330022; 2.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
Author(s):
HUANG Qingyuan1; ZHANG Jiarong1; DAI Fang2; WANG Junyi1; LI Ping1; ZHANG Lei1*; WEN Zubiao1*
1.College of Chemistry and Chemical Engineering,Jiangxi Normal University,Nanchang Jiangxi 330022,China; 2.Jiangxi Province Key Laboratory of Precision Drive and Control,Nanchang Institute of Technology,Nanchang Jiangxi 330099,China
关键词:
超级电容器;  电极材料;  δ-MnO2纳米线;  电化学性能
Keywords:
supercapacitor;  electrode material;  δ-MnO2 nanowire;  eletrochemical performance
分类号:
O 613.71; TM 53
DOI:
10.16357/j.cnki.issn1000-5862.2018.02.08
文献标志码:
A
摘要:
以MnSO4、(NH4)2S2O8为反应物,(NH4)2SO4为模板试剂,利用水热法制备了δ-MnO2纳米线.分别采用XRD、SEM、N2吸附/脱附等方法对试样的晶体结构、形貌、比表面积进行了表征.用循环伏安、恒流充放电、交流阻抗和循环稳定性测试等方法测试其电化学性能.结果表明:δ-MnO2具有纳米线状结构和较大的比表面积(82.43 m2·g-1),在6 mol·L-1 KOH电解液中,当扫描速率为2 mV·s-1时,δ-MnO2纳米线的比电容为127.60 F·g-1,高于β-MnO2的比电容(60.89 F·g-1),充放电循环2 500次后其容量和库仑效率保持稳定.在电流密度为0.4 A·g-1时,组装的AC/6 mol·L-1 KOH/δ-MnO2装置的功率密度为36.45 W·kg-1,能量密度为10.33 Wh·kg-1.
Abstract:
The δ-MnO2 nanowires are prepared by hydrothermal synthesis method using MnSO4,(NH4)2S2O8 as reactants and(NH4)2SO4 as templates.Their crystal structure,morphology,specific surface area are characterized by scanning electron microscopy,X-ray diffraction,nitrogen adsorption-desorption at 77 K,respectively.Their electrochemical performances in 6 mol·L-1 KOH solution are evaluated by cyclic voltammetry,galvanostatic charge-discharge and electrochemical impedance spectroscopy.The specific capacitance of δ-MnO2 nanowires(127.60 F·g-1)is much higher than that of β-MnO2(60.89 F·g-1)at the scan rate of 2 mV·s-1.The δ-MnO2 nanowires remain excellent cycling stability and the capacitance is no evident fading after a 2 500-cycle charge-discharge.The asymmetric supercapacitors of AC/6 mol·L-1 KOH/δ-MnO2 present the energy density of 10.33 Wh·kg-1 at the power density of 36.45 W·kg-1 at the 0.4 A·g-1 current density.

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　ZHU Yangjun,TAN Junyan,YU Feng,et al.The Preparation and Electrochemical Performance of Amorphous MnO2[J].Journal of Jiangxi Normal University:Natural Science Edition,2015,(02):420.
[2]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.
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[3]代 芳,朱杨军,张志超,等.亚微米K0.4MoO3电极材料的制备与电化学特性[J].江西师范大学学报(自然科学版),2017,(02):140.
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[4]朱杨军,谭军艳,徐雅梅,等.纳米层状二氧化锰的制备及电化学性能研究[J].江西师范大学学报(自然科学版),2015,(06):551.
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备注/Memo

备注/Memo:
收稿日期:2017-07-05
基金项目:国家自然科学基金(21463013),江西省自然科学基金(20171BAB203013)和江西省教育厅科技课题(GJJ160290)资助项目.
通信作者:温祖标(1976-),男,江西石城人,副教授,博士,主要从事纳米材料电化学研究.E-mail:wenzubiao@163.com 章 磊(1968-),女,江西南昌人,副教授,主要从事纳米材料电化学研究.E-mail:lzhang@jxnu.edu.cn
更新日期/Last Update: 2018-04-20