Flexible Supercapacitor Electrodes Based on Carbon Cloth-Supported LaMnO3/MnO Nano-Arrays by One-Step Electrodeposition

被引：53

作者：

Ma, Pianpian ^{[1
,2
,3
,4
]}

Lei, Na ^{[1
]}

Yu, Bo ^{[1
]}

Liu, Yongkun ^{[1
]}

Jiang, Guohua ^{[1
,2
,3
,4
]}

Dai, Jianming ^{[1
]}

Li, Shuhong ^{[1
]}

Lu, Qiuling ^{[1
]}

机构：

[1] Zhejiang Sci Tech Univ, Sch Mat Sci & Engn, Hangzhou 310018, Peoples R China

[2] Zhejiang Sci Tech Univ, Key Lab ATMMT, Minist Educ, Hangzhou 310018, Peoples R China

[3] Zhejiang Sci Tech Univ, Natl Engn Lab Text Fiber Mat & Proc Technol, Hangzhou 310018, Peoples R China

[4] Zhejiang Sci Tech Univ, Inst Smart Fiber Mat, Hangzhou 310018, Peoples R China

来源：

NANOMATERIALS | 2019年 / 9卷 / 12期

基金：

美国国家科学基金会;

关键词：

perovskite-type LaMnO3; MnO; supercapacitor flexible electrode; electrochemical properties; carbon cloth; electrodeposition; CO-S NANOSHEETS; ELECTROCHEMICAL PROPERTIES; ASYMMETRIC SUPERCAPACITOR; PEROVSKITE OXIDES; OXYGEN REDUCTION; PERFORMANCE; NANOPARTICLES; EFFICIENT; DESIGN; INTERCALATION;

D O I：

10.3390/nano9121676

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

La-based perovskite-type oxide is a new type of supercapacitor electrode material with great potential. In the present study, LaMnO3/MnO (LMO/MnO) nano-arrays supported by carbon cloth are prepared via a simple one-step electrodeposition as flexible supercapacitor electrodes. The structure, deposit morphology of LMO/MnO, and the corresponding electrochemical properties have been investigated in detail. Carbon cloth-supported LMO/MnO electrode exhibits a specific capacitance of 260 Fg(-1) at a current density of 0.5 Ag-1 in 0.5 M Na2SO4 aqueous electrolyte solution. The cooperative effects of LMO and MnO, as well as the uniform nano-array morphology contribute to the good electrochemical performance. In addition, a symmetric supercapacitor with a wide voltage window of 2 V is fabricated, showing a high energy density of 28.15 Whkg(-1) at a power density of 745 Wkg(-1). The specific capacitance drops to 65% retention after the first 500 cycles due to the element leaching effect and partial flaking of LMO/MnO, yet remains stable until 5000 cycles. It is the first time that La-based perovskite has been exploited for flexible supercapacitor applications, and further optimization is expected.

引用

页数：15

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