Kinetic Evidence That the Solvent Barrier for Electron Transfer Is Absent in the Electric Double Layer

2020 ◽  
Vol 142 (35) ◽  
pp. 14940-14946 ◽  
Author(s):  
Rachel E. Bangle ◽  
Jenny Schneider ◽  
Daniel T. Conroy ◽  
Bruno M. Aramburu-Trošelj ◽  
Gerald J. Meyer
Keyword(s):  
Electron Transfer ◽  
Double Layer ◽  
Electric Double Layer

Electron-Transfer Kinetics and Electric Double Layer Effects in Nanometer-Wide Thin-Layer Cells

ACS Nano ◽  
2014 ◽  
Vol 8 (10) ◽  
pp. 10426-10436 ◽  
Author(s):  
Lixin Fan ◽  
Yuwen Liu ◽  
Jiewen Xiong ◽  
Henry S. White ◽  
Shengli Chen
Keyword(s):  
Electron Transfer ◽  
Thin Layer ◽  
Double Layer ◽  
Electric Double Layer ◽  
Electron Transfer Kinetics

scholarly journals Reducing the Self-Discharge Rate of Supercapacitors by Suppressing Electron Transfer in the Electric Double Layer

2021 ◽  
Author(s):  
Mingwei Shi ◽  
Zailei Zhang ◽  
Man Zhao ◽  
Xianmao Lu ◽  
Zhong Lin (Z.L.) Wang
Keyword(s):  
Electron Transfer ◽  
Double Layer ◽  
Electric Double Layer ◽  
Electrolyte Concentration ◽  
Discharge Rate ◽  
Free Water ◽  
Open Circuit ◽  
The Self ◽  
Concentrated Electrolytes ◽  
Term Energy

Abstract Designing supercapacitors with suppressed self-discharge for long-term energy storage has been a challenge. In this work, we demonstrate that substantially reduced self-discharge rate can be achieved by using highly concentrated electrolytes. Specifically, when supercapacitors with 14 M LiCl electrolyte are charged to 0.80 V, the open circuit voltage (OCV) drops to 0.65 V in 24 h. In stark contrast, when the electrolyte concentration is reduced to 1 M, the OCV drops from 0.80 to 0.65 V within only 0.3 h, which was 80 times faster than that with 14 M LiCl. Decreased OCV decay rate at high electrolyte concentration is also confirmed for supercapacitors with different electrolytes (e.g., LiNO3) or at higher charging voltages (1.60 V). The slow self-discharge in highly concentrated electrolyte can be largely attributed to impeded electron transfer between the electrodes and electrolyte due to the formation of hydration clusters and reduced amount of free water molecules, thereby faradaic reactions that cause fast self-discharge are reduced. Our study not only supports the newly revised model about the formation of electric double layer with the inclusion of electron transfer, but also points a direction for substantially reducing the self-discharge rate of supercapacitors.

Electrode for Electric Double Layer Capacitor Made of Carbonized and Activated Cotton Cloth

2014 ◽  
Vol 134 (5) ◽  
pp. 360-361
Author(s):  
Masumi Fukuma ◽  
Takayuki Uchida ◽  
Yukito Fukushima ◽  
Jinichi Ogawa ◽  
Katsumi Yoshino
Keyword(s):  
Double Layer ◽  
Electric Double Layer ◽  
Cotton Cloth ◽  
Electric Double Layer Capacitor ◽  
Double Layer Capacitor
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