scholarly journals Supercapacitor Electrodes from Viscose-Based Activated Carbon Fibers: Significant Yield and Performance Improvement Using Diammonium Hydrogen Phosphate as Impregnating Agent

2020 ◽  
Vol 6 (2) ◽  
pp. 17
Author(s):  
Stefan Breitenbach ◽  
Alexander Lumetzberger ◽  
Mathias Andreas Hobisch ◽  
Christoph Unterweger ◽  
Stefan Spirk ◽  
...  

Viscose fibers were impregnated with different concentrations of diammonium hydrogen phosphate (DAHP), carbonized, activated, and tested as high-performance electrode materials for supercapacitors. The yield of these activated carbon fibers (ACFs) could be increased by a factor of 14 by using DAHP compared to ACF without impregnation. These specific activation procedures yielded a high specific surface area of more than 2700 m2·g−1 with a pore size distribution (PSD) suitable for use as a supercapacitor electrode. The electrode materials were implemented in symmetric supercapacitors using TEMA BF4 as electrolyte and cyclic voltammetry measurements showed high specific capacitances of up to 167 F·g−1. Furthermore, the devices showed high energy densities of up to 21.4 W·h·kg−1 and high-power densities of up to 8.7 kW·kg−1. The supercapacitors featured high capacity retention (96%) after 10,000 cycles. These results show that ACFs made of viscose fibers, previously impregnated with DAHP, can be used as high-performance electrodes in supercapacitors for energy storage applications.

2006 ◽  
Vol 153 (2) ◽  
pp. 419-423 ◽  
Author(s):  
K. Leitner ◽  
A. Lerf ◽  
M. Winter ◽  
J.O. Besenhard ◽  
S. Villar-Rodil ◽  
...  

2016 ◽  
Vol 4 (46) ◽  
pp. 18164-18173 ◽  
Author(s):  
Xiaoyu Lu ◽  
Yang Bai ◽  
Ranran Wang ◽  
Jing Sun

A carbon fiber-based positive electrode enhanced by CNT modification with NiCo(OH)x and a negative electrode functionalized with activated carbon were prepared. The supercapacitor showed high energy and power densities.


RSC Advances ◽  
2016 ◽  
Vol 6 (18) ◽  
pp. 14819-14825 ◽  
Author(s):  
Kai Zhu ◽  
Yu Wang ◽  
Joel A. Tang ◽  
Hailong Qiu ◽  
Xing Meng ◽  
...  

MnO2 nanosheets were successfully grown in situ on the surface of activated carbon fibers (ACFs) via a facile microwave-assisted hydrothermal method.


2017 ◽  
Vol 1 (5) ◽  
pp. 958-966 ◽  
Author(s):  
Kai Zhu ◽  
Yu Wang ◽  
Joel A. Tang ◽  
Shaohua Guo ◽  
Zhongmin Gao ◽  
...  

Activated carbon fibers with optimized pore structures and oxygen-containing functional groups display a remarkable capacitance and an excellent cycling performance.


2014 ◽  
Vol 2 (30) ◽  
pp. 11706-11715 ◽  
Author(s):  
Zhi Jin ◽  
Xiaodong Yan ◽  
Yunhua Yu ◽  
Guangjie Zhao

The combination of the high micropore surface area and the controlled mesopore size and mesopore/micropore ratio is responsible for high specific capacitance and excellent rate capability.


2020 ◽  
Vol 8 (9) ◽  
pp. 2000417
Author(s):  
Navakanth Vijay Challagulla ◽  
Manavalan Vijayakumar ◽  
Duggirala Sri Rohita ◽  
George Elsa ◽  
Ammaiyappan Bharathi Sankar ◽  
...  

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