|本期目录/Table of Contents|

[1]杜文浩,王一帆,史伊媛,等.水热时间和低温热处理对 δ MnO 2电容性能的影响[J].浙江理工大学学报,2018,39-40(自科3):259-267.
 DU Wenhao,WANG Yifan,SHI Yiyuan,et al.Effects of hydrothermal time and lowtemperature heat treatment on supercapacitor properties of  δ MnO 2[J].Journal of Zhejiang Sci-Tech University,2018,39-40(自科3):259-267.
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水热时间和低温热处理对 δ MnO 2电容性能的影响()
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浙江理工大学学报[ISSN:1673-3851/CN:33-1338/TS]

卷:
第39-40卷
期数:
2018年自科3期
页码:
259-267
栏目:
出版日期:
2018-05-19

文章信息/Info

Title:
Effects of hydrothermal time and lowtemperature heat treatment on supercapacitor properties of  δ MnO 2
文章编号:
1673-3851 (2018) 05-0259-09
作者:
杜文浩王一帆史伊媛粟晨胡益彰王騊
浙江理工大学先进纺织材料与制备技术教育部重点实验室,杭州 310018
Author(s):
DU Wenhao WANG Yifan SHI Yiyuan SU Chen HU Yizhang WANG Tao
Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University, Hangzhou 310018, China
关键词:
超级电容器水热法低温热处理结晶性物理吸附水电化学性能
分类号:
O649.1
文献标志码:
A
摘要:
以高锰酸钾(KMnO 4)为原料,在不同反应时间下水热法制备δ MnO 2,同时对不同反应时间制备的 δ MnO 2进行300 ℃低温热处理。通过SEM揭示 δ MnO2的生长机理,采用SEM、TEM和XRD对 δ MnO2的形貌和结晶度进行表征,利用N 2吸附脱附法表征δ MnO2的比表面积,通过恒电流充放电、循环伏安法和交流阻抗法对δ MnO 2的电化学性能进行测试。实验结果表明:随着水热时间的延长, δ MnO2的结晶度依次增加,比电容逐渐增大;当电流密度为0.1 A/g时,10 h的样品在1 M Na 2SO 4电解液中比电容高达264 F/g,展现出最优的比电容。进一步对水热样品进行300 ℃低温热处理,结晶度进一步提高的同时物理吸附水大量丢失,导致比电容均出现下降。结果证实了δ MnO 2的结晶度和表面的物理吸附水对电容性能都具有贡献作用,二者缺一不可。 δ MnO 2随着结晶度的提高,层状结构越趋稳定,存储离子电荷的能力不断增强,同时材料表面的物理吸附水有助于提高电解液与电极材料之间的浸润性,降低电荷转移电阻,产生较大的赝电容。

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备注/Memo

备注/Memo:
收稿日期: 2017-09-30
网络出版日期: 2017-12-11
基金项目: 国家自然科学基金项目(51471153)
作者简介: 杜文浩(1993-),男,安徽合肥人,硕士研究生,主要从事超级电容器赝电容材料方面的研究
通信作者: 王騊,E-mail:taotao571@hotmail.com
更新日期/Last Update: 2018-06-19