Microporous MOFs Engaged in the Formation of Nitrogen-Doped Mesoporous Carbon Nanosheets for High-Rate Supercapacitors

被引：23

作者：

Hou, Ya-Nan ^{[1
]}

Zhao, Zongbin ^{[1
]}

Yu, Zhengfa ^{[1
]}

Zhang, Su ^{[2
]}

Li, Shaofeng ^{[1
]}

Yang, Juan ^{[1
]}

Zhang, Han ^{[1
]}

Liu, Chang ^{[1
]}

Wang, Zhiyu ^{[1
]}

Qiu, Jieshan ^{[1
]}

机构：

[1] Dalian Univ Technol, State Key Lab Fine Chem, Sch Chem Engn, Liaoning Key Lab Energy Mat & Chem Engn, Dalian 116024, Liaoning, Peoples R China

[2] Xinjiang Univ, Key Lab Energy Mat Chem, Minist Educ, Key Lab Adv Funct Mat,Autonomous Reg Inst Appl Ch, Urumqi 830046, Xinjiang, Peoples R China

来源：

CHEMISTRY-A EUROPEAN JOURNAL | 2018年 / 24卷 / 11期

基金：

中国国家自然科学基金;

关键词：

carbon; doping; mesoporous materials; metal-organic frameworks; nanosheets; METAL-ORGANIC FRAMEWORK; HIGH-PERFORMANCE SUPERCAPACITORS; CAPACITIVE ENERGY-STORAGE; POROUS CARBON; NANOPOROUS CARBONS; OXYGEN REDUCTION; RECENT PROGRESS; IONIC LIQUID; GRAPHENE; ELECTRODE;

D O I：

10.1002/chem.201705006

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Nitrogen-doped mesoporous carbon nanosheets (NMCS) have been fabricated from zinc-based microporous metal-organic frameworks (ZIF-8) by pyrolysis in a molten salt medium. The as-prepared NMCS exhibit significantly improved specific capacitance (NMCS-8: 232Fg(-1) at 0.5Ag(-1)) and capacitance retention ratio (75.9% at 50Ag(-1)) compared with the micropore-dominant nitrogen-doped porous carbon polyhedrons (NPCP-5: 178Fg(-1) at 0.5Ag(-1), 15.9% at 20Ag(-1)) obtained by direct pyrolysis of nanocrystalline ZIF-8. The excellent capacitive performance and high rate performance of the NMCS can be attributed to their unique combination of structure and composition, that is, the two-dimensional and hierarchically porous structure provides a short ion-transport pathway and facilitates the supply of electrolyte ions, and the nitrogen-doped polar surface improves the interface wettability when used as an electrode.

引用

页码：2681 / 2686

页数：6

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