High-voltage asymmetric supercapacitors operating in aqueous electrolyte

2005 ◽  
Vol 82 (4) ◽  
pp. 567-573 ◽  
Author(s):  
V. Khomenko ◽  
E. Raymundo-Piñero ◽  
E. Frackowiak ◽  
F. Béguin
Keyword(s):  
High Voltage ◽  
Aqueous Electrolyte ◽  
Asymmetric Supercapacitors

Graphene-based materials for high-voltage and high-energy asymmetric supercapacitors

2017 ◽  
Vol 6 ◽  
pp. 70-97 ◽  
Author(s):  
Shuanghao Zheng ◽  
Zhong-Shuai Wu ◽  
Sen Wang ◽  
Han Xiao ◽  
Feng Zhou ◽  
...  
Keyword(s):  
High Voltage ◽  
High Energy ◽  
Asymmetric Supercapacitors

A scalable strategy toward compliant tandem yarn-shaped supercapacitors with high voltage output

2021 ◽  
Author(s):  
Juan Zhang ◽  
Qingli Xu ◽  
Xiangyu Qian ◽  
Xinhou Wang ◽  
Kun Zhang
Keyword(s):  
High Voltage ◽  
Aqueous Electrolyte ◽  
Low Voltage ◽  
Voltage Output ◽  
In Series

Yarn-shaped supercapacitors (YSSCs) based on aqueous electrolyte exhibit relatively low voltage output due to the low decomposition voltage of water (~1.23 V). Applying organic-based electrolyte or connecting YSSCs in series...

scholarly journals Electrochemical Features of Symmetric and Asymmetric Supercapacitors Based on Nanostructured Mn-Cuo Electrodes

2018 ◽  
Vol 34 (6) ◽  
pp. 3058-3063 ◽  
Author(s):  
R. Suresh ◽  
K. Tamilarasan ◽  
D. Senthil Vadivu
Keyword(s):  
Current Density ◽  
Material Science ◽  
Electrode Materials ◽  
Aqueous Electrolyte ◽  
Cyclic Stability ◽  
Initial Value ◽  
Asymmetric Supercapacitors ◽  
Supercapacitive Performance ◽  
Subsequent Investigation ◽  
A Current

Progress in material science has unearthed a number of options that offer great advantages for nanostructured electrode materials which enable supercapacitors to operate efficiently. Present work involves fabrication of symmetric and asymmetric type supercapacitor devices utilizing Mn-CuO nanostructures and activated carbon (AC) as electrode materials and subsequent investigation on their supercapacitive performance in 2M KOH aqueous electrolyte. The asymmetric supercapacitor device (Mn-CuO // 2M KOH// AC) demonstrate a specific capacitance of 72 Fg-1 at a current density of 0.5 Ag-1. The cyclic stability test of this device performed at a current density of 10 Ag-1 reveals a capacitance retention of 71% of its initial value over 300 charge-discharge cycles. In addition, this device exhibits an energy density of 7.4 Whkg-1 and a power density of 127 Wkg-1.

Influence of aqueous electrolyte concentration on parasitic reactions in high-voltage electrochemical capacitors

2016 ◽  
Vol 5 ◽  
pp. 111-115 ◽  
Author(s):  
Minglong He ◽  
Krzysztof Fic ◽  
Elżbieta Frąckowiak ◽  
Petr Novák ◽  
Erik J. Berg
Keyword(s):  
High Voltage ◽  
Electrolyte Concentration ◽  
Aqueous Electrolyte ◽  
Electrochemical Capacitors

High voltage supercapacitors using hydrated graphene film in a neutral aqueous electrolyte

2011 ◽  
Vol 13 (11) ◽  
pp. 1166-1169 ◽  
Author(s):  
Xiaowei Yang ◽  
Yu-Shi He ◽  
Gengping Jiang ◽  
Xiao-Zhen Liao ◽  
Zi-Feng Ma
Keyword(s):  
High Voltage ◽  
Aqueous Electrolyte ◽  
Graphene Film ◽  
Neutral Aqueous Electrolyte

Asymmetric supercapacitors based on carbon nanofibre and polypyrrole/nanocellulose composite electrodes

RSC Advances ◽  
2015 ◽  
Vol 5 (21) ◽  
pp. 16405-16413 ◽  
Author(s):  
Petter Tammela ◽  
Zhaohui Wang ◽  
Sara Frykstrand ◽  
Peng Zhang ◽  
Ida-Maria Sintorn ◽  
...  
Keyword(s):  
Current Density ◽  
Aqueous Electrolyte ◽  
Cell Voltage ◽  
Composite Electrodes ◽  
Asymmetric Supercapacitors ◽  
Carbon Nanofibre ◽  
Maximum Cell ◽  
A Current

Asymmetric, all-organic supercapacitors (containing an aqueous electrolyte), exhibiting a capacitance of 25 F g−1 (or 2.3 F cm−2) at a current density of 20 mA cm−2 and a maximum cell voltage of 1.6 V, are presented.

Ultrathin Cu-MOF@δ-MnO2 nanosheets for aqueous electrolyte-based high-voltage electrochemical capacitors

2018 ◽  
Vol 6 (36) ◽  
pp. 17329-17336 ◽  
Author(s):  
Jing Xu ◽  
Yan Wang ◽  
Shuai Cao ◽  
Jian Zhang ◽  
Guangxun Zhang ◽  
...  
Keyword(s):  
High Voltage ◽  
Aqueous Electrolyte ◽  
Electrochemical Capacitors ◽  
Water Electrolysis ◽  
Operating Voltage ◽  
Asymmetric Supercapacitor ◽  
Mno2 Nanosheets

Ultrathin Cu-MOF@δ-MnO2 nanosheets have been successfully prepared and the operating voltage window of the asymmetric supercapacitor can reach high values in aqueous electrolyte without any water electrolysis.

scholarly journals Electrodeposited Porous Mn1.5Co1.5O4/Ni Composite Electrodes for High-Voltage Asymmetric Supercapacitors

Materials ◽  
2017 ◽  
Vol 10 (4) ◽  
pp. 370 ◽  
Author(s):  
Guan-Ting Pan ◽  
Siewhui Chong ◽  
Thomas Yang ◽  
Chao-Ming Huang
Keyword(s):  
High Voltage ◽  
Composite Electrodes ◽  
Asymmetric Supercapacitors
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