High-Performance Asymmetric Supercapacitors Based on Multilayer MnO2/Graphene Oxide Nanoflakes and Hierarchical Porous Carbon with Enhanced Cycling Stability

被引：325

作者：

Zhao, Yufeng ^{[1
]}

Ran, Wei ^{[1
]}

He, Jing ^{[1
]}

Huang, Yizhong ^{[2
]}

Liu, Zhifeng ^{[2
]}

Liu, Wei ^{[3
]}

Tang, Yongfu ^{[1
]}

Zhang, Long ^{[1
]}

Gao, Dawei ^{[1
]}

Gao, Faming ^{[1
]}

机构：

[1] Yanshan Univ, Key Lab Appl Chem, Qinhuangdao 066004, Peoples R China

[2] Nanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore

[3] Ocean Univ China, Inst Mat Sci & Engn, Qingdao 26610, Peoples R China

来源：

SMALL | 2015年 / 11卷 / 11期

关键词：

ACTIVATED CARBONS; GRAPHENE; ELECTRODES; COMPOSITE;

D O I：

10.1002/smll.201401922

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In this work, MnO2/GO (graphene oxide) composites with novel multilayer nanoflake structure, and a carbon material derived from Artemia cyst shell with genetic 3D hierarchical porous structure (HPC), are prepared. An asymmetric supercapacitor has been fabricated using MnO2/GO as positive electrode and HPC as negative electrode material. Because of their unique structures, both MnO2/GO composites and HPC exhibit excellent electrochemical performances. The optimized asymmetric supercapacitor could be cycled reversibly in the high voltage range of 0-2 V in aqueous electrolyte, which exhibits maximum energy density of 46.7 Wh kg(-1) at a power density of 100 W kg(-1) and remains 18.9 Wh kg(-1) at 2000 W kg(-1). Additionally, such device also shows superior long cycle life along with similar to 100% capacitance retention after 1000 cycles and similar to 93% after 4000 cycles.

引用

页码：1310 / 1319

页数：10

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