Nano-dimensional iron tungstate for super high energy density symmetric supercapacitor with redox electrolyte

被引：12

作者：

Jadhav, Sagar ^{[1
,2
,3
]}

Donolikar, Pratiksha D. ^{[2
,3
]}

Chodankar, Nilesh R. ^{[3
,4
]}

Dongale, Tukaram D. ^{[2
,3
]}

Dubal, Deepak P. ^{[3
,5
]}

Patil, Deepak R. ^{[1
,3
]}

机构：

[1] Minist Elect & Informat Technol MeitY, Ctr Mat Elect Technol, Pune 411008, Maharashtra, India

[2] Shivaji Univ, Sch Nanosci & Biotechnol, Computat Elect & Nanosci Res Lab, Kolhapur 416004, Maharashtra, India

[3] Seoul Natl Univ, Dept Phys & Astron, Ctr Novel State Complex Mat Res, Seoul 151747, South Korea

[4] Dongguk Univ, Dept Energy & Mat Engn, Seoul 100715, South Korea

[5] Queensland Univ Technol, Sch Chem Phys & Mech Engn, 2 George St, Brisbane, Qld 4001, Australia

来源：

JOURNAL OF SOLID STATE ELECTROCHEMISTRY | 2019年 / 23卷 / 12期

基金：

澳大利亚研究理事会;

关键词：

Symmetric supercapacitors; Redox species; High energy; Voltage; HIGH-PERFORMANCE; ELECTROCHEMICAL PERFORMANCE; CARBON; NANOPARTICLES; STORAGE; OXIDE; BATTERY; FEWO4;

D O I：

10.1007/s10008-019-04427-x

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

In present work, we have developed 2.0 V symmetric supercapacitor with rationally prepared iron tungstate (FeWO4) nanoparticles as electrodes and redox-active electrolyte. It is revealed that the electrochemical performances of FeWO4-system were significantly improved due to the addition of potassium iodide (KI) redox additive in conventional KOH electrolyte in terms of the specific capacitance and energy density. Notably, FeWO4-based symmetric cell with KI-additive shown two-fold enhancement in specific energy (113 Wh/kg) compared with the cell with pristine KOH electrolyte (41.62 Wh/kg). Such an excellent enhancement is attributed to the improvement in the stability of existing KOH electrolyte by KI which influences the strength of OH bond in aqueous media and prevents the breakdown of electrolyte without adversely affecting the redox behavior and on contrary supporting the interactions at the higher potential to produce better results.

引用

页码：3459 / 3465

页数：7

共 27 条

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