All-in-one supercapacitor devices based on nanosized Mn4+-doped WO3

被引：22

作者：

Ammar, Ameen Uddin ^{[1
]}

Stan, Manuela ^{[2
]}

Popa, Adriana ^{[2
]}

Toloman, Dana ^{[2
]}

Macavei, Sergiu ^{[2
]}

Leostean, Cristian ^{[2
]}

Ciorita, Alexandra ^{[2
,3
]}

Erdem, Emre ^{[1
]}

Rostas, Arpad Mihai ^{[2
]}

机构：

[1] Sabanci Univ, Fac Engn & Nat Sci, TR-34956 Istanbul, Turkiye

[2] Natl Inst Isotop & Mol Technol, Donat 67-103, Cluj Napoca 400293, Cluj, Romania

[3] Babes Bolyai Univ, Fac Biol & Geol, 44 Republicii, Cluj Napoca 400015, Cluj, Romania

来源：

JOURNAL OF ENERGY STORAGE | 2023年 / 72卷

关键词：

Symmetric supercapacitors; EPR spectroscopy; Mn4+-ions; TUNGSTEN-OXIDE; DOPED WO3; ENERGY DENSITY; ION; DEGRADATION; ELECTRODES;

D O I：

10.1016/j.est.2023.108599

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

In this study, nanosized Mn-doped WO3-based materials were used as electrode materials for high-performance supercapacitor devices. Various Mn concentrations (0.5, 1, and 1.5%) were used to change the defect structure of WO3, which improved the material's electrical properties. A thorough morpho-structural and defect structure analysis of the undoped and doped WO3 was performed through various characterization techniques, among which EPR and PL spectroscopy gave insight into the effect that Mn-doping caused on the defect structure and optical properties of WO3. The presence of Mn4+ ions and a high concentration of oxygen vacancies was observed, strongly influencing the electrode material when used in symmetric supercapacitors, where the electrochemical performance was tested. The symmetric supercapacitors were designed without booster materials (like carbon black) and showed increased specific capacitance (115 F/g) and energy density (16 Wh/Kg) values.

引用

页数：8

共 43 条

[1] Photocatalytic effect of manganese doped WO3 and the effect of dopants on degradation of methylene blue [J].