The electrochemical performance of SnO2 quantum dots@zeolitic imidazolate frameworks-8 (ZIF-8) composite material for supercapacitors

被引：74

作者：

Gao, Yilong ^{[1
]}

Wu, Jianxiang ^{[1
]}

Zhang, Wei ^{[1
]}

Tan, Yueyue ^{[1
]}

Zhao, Jiachang ^{[1
]}

Tang, Bohejin ^{[1
]}

机构：

[1] Shanghai Univ Engn Sci, Coll Chem & Chem Engn, Shanghai 201620, Peoples R China

来源：

MATERIALS LETTERS | 2014年 / 128卷

关键词：

SnO2 quantum dots@ZIF-8; Supercapacitors; Porous materials; Energy storage and conversion; OXIDATION; OXIDE;

D O I：

10.1016/j.matlet.2014.04.175

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

SnO2\ quantum dots@ZIF-8 is successfully synthesized via a simple in-situ epoxide precipitation route and investigated as an electrochemical pseudo-capacitor material in 6 M KOH electrolyte. Structural characterizations illustrate the dispersion of SnO2 quantum dots in the ZIF-8. The porous structure combined with SnO2 quantum dots maximizes the utilization of active material, resulting in a high specific capacitance. A maximum specific capacitance of the SnO2 quantum dots@ZIF-8 can reach up to 931 F g(-1) at a scan rate of 5 mV s(-1), which is far higher than SnO2 quantum dots (241 F g(-1)) and ZIF-8 (99 F g(-1)). Meanwhile, SnO2 quantum dots@ZIF-8 exhibits a good cycling stability over 500 cycles. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：208 / 211

页数：4

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