Synthesis and characterization of α-MnO2 nanoneedles for electrochemical supercapacitors

被引：121
|
作者：
Davoglio, Rogerio A. [1 ]
Cabello, Gema [1 ,2 ]
Marco, Jose F. [3 ]
Biaggio, Sonia R. [1 ]
机构：
[1] Univ Fed Sao Carlos, Dept Quim, BR-13565905 Sao Carlos, SP, Brazil
[2] Univ Aberdeen, Sch Med Med Sci & Nutr, Aberdeen AB25 2ZD, Scotland
[3] CSIC, Inst Quim Fis Rocasolano, C Serrano 119, Madrid 28006, Spain
来源：
ELECTROCHIMICA ACTA | 2018年 / 261卷
关键词：
Manganese oxide; Liquid-liquid interfacial reaction; Microwave-assisted synthesis; Needle-type morphology; 1D structure; HYDROTHERMAL SYNTHESIS; PSEUDOCAPACITANCE PROPERTIES; INTERFACIAL SYNTHESIS; ELECTRODE MATERIAL; RUTHENIUM OXIDE; ENERGY-STORAGE; CHARGE STORAGE; MNO2; PERFORMANCE; FILMS;
D O I：
10.1016/j.electacta.2017.12.118
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
In this work, we report the microwave-assisted synthesis of alpha-MnO2 particles at the aqueous-organic interface. Morphological and structural characterizations were performed by SEM, HR-TEM, RXD and XPS. alpha-MnO2 particles presented 1D-needle shaped structure with 20 nm thickness. Electrochemical performance was studied by cyclic voltammetry at different potential windows and scan rates, and by galvanostatic charge-discharge measurements. MnO2 nanoneedles exhibited capacitances up to 289 Fg(-1) (at 0.5 Ag-1) and good electrochemical stability (up to 88% of the initial capacitance after 10,000 charge/discharge cycles), confirming a good performance as electrode materials for supercapacitors. (c) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码：428 / 435
页数：8
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