MnO2 nanoflakes anchored on reduced graphene oxide nanosheets as high performance anode materials for lithium-ion batteries

被引：21

作者：

Cao, Yong ^{[1
]}

Lin, Xionggui ^{[1
]}

Zhang, Chenglong ^{[1
]}

Yang, Cheng ^{[1
]}

Zhang, Qian ^{[1
]}

Hu, Weiqiang ^{[1
]}

Zheng, Mingsen ^{[1
]}

Dong, Quanfeng ^{[1
]}

机构：

[1] Xiamen Univ, Dept Chem, Coll Chem & Chem Engn, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Fujian, Peoples R China

来源：

RSC ADVANCES | 2014年 / 4卷 / 57期

关键词：

ALPHA-MNO2; NANORODS; IN-SITU; FABRICATION; NANOPARTICLES; STORAGE; ENERGY; COMPOSITES; CAPACITY;

D O I：

10.1039/c4ra02838d

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A MnO2 nanoflake-reduced graphene oxide (MnO2-rGO) composite was synthesized by a facile solution method. The composite exhibited excellent electrochemical performance with a reversible capacity of 1430 mA h g(-1) and 520 mA h g(-1) at current densities of 0.1 A g(-1) and 10 A g(-1), respectively. MnO2 in the composite was proved to be fully activated and went through a complete conversion reaction. The improved kinetics in the MnO2-rGO composite electrode were evidenced by Electrochemical Impedance Spectroscopy (EIS) results, accounting for its extraordinary electrochemical properties compared with that in a simple MnO2-rGO mixture electrode. Due to the uniform dispersion and firm anchoring of MnO2 nanoflakes on the rGO surface, the volume expansion of MnO2 during the charge-discharge process was significantly alleviated. It showed excellent cyclic performance with an extremely large capacity of 1000 mA h g(-1) maintained after 200 cycles at the current density of 1 A g(-1).

引用

页码：30150 / 30155

页数：6

共 28 条

[1] Nanostructured materials for advanced energy conversion and storage devices [J].