Enhanced electrochemical performances of peanut shell derived activated carbon and its Fe3O4 nanocomposites for capacitive deionization of Cr(VI) ions

Rational design and development of the electrodes with high-mass loading yet maintaining the excellent electrochemical properties are significant for a variety of electrochemical energy storage applications. In comparison with the slurry-casted electrode, herein, a hierarchically porous activated carbon (HPAC) electrode with higher mass loading (8.3 ± 0.2 mg/cm2) is successfully prepared. The pouch-type symmetric device (1 cell) with the propylene carbonate-based electrolyte shows the rate capability (7.1 F at 1 mA/cm2 and 4.8 F at 10 mA/cm2) and the cycling stability (83% at 12,000 cycles). On the other hand, an initial discharge capacitance of 32.4 F and the capacitance retention of 96% after 30,000 cycles are delivered from a pouch-type symmetric supercapacitor (five cells). The corresponding electrochemical performances are attributed to the fascinating properties of the HPAC and the synergistic features of the resulting electrode.

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Hybrid capacitive deionization of NaCl and toxic heavy metal ions using faradic electrodes of silver nanospheres decorated pomegranate peel-derived activated carbon

Environmental Research ◽

10.1016/j.envres.2021.111110 ◽

2021 ◽

Vol 197 ◽

pp. 111110

Author(s):

G. Bharath ◽

Abdul Hai ◽

K. Rambabu ◽

Faheem Ahmed ◽

Ahmed S. Haidyrah ◽

...

Keyword(s):

Heavy Metal ◽

Activated Carbon ◽

Metal Ions ◽

Heavy Metal Ions ◽

Capacitive Deionization ◽

Pomegranate Peel ◽

Toxic Heavy Metal ◽

Silver Nanospheres

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High Performance Hybrid Capacitive Deionization with Ag-coated Activated Carbon Electrode

Environmental Science Water Research & Technology ◽

10.1039/d1ew00209k ◽

2021 ◽

Author(s):

Hongsik Yoon ◽

Jiho Lee ◽

Taijin Min ◽

Gunhee Lee ◽

Minsub Oh

Keyword(s):

Activated Carbon ◽

Water Treatment ◽

Industrial Application ◽

High Performance ◽

Treatment System ◽

Carbon Electrode ◽

Capacitive Deionization ◽

Water Treatment System

Capacitive deionization (CDI) has been highlighted as a promising electrochemical water treatment system. However, the low deionization capacity of CDI electrodes has been a major limitation for its industrial application,...

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Enhanced desalination performance in asymmetric flow electrode capacitive deionization with nickel hexacyanoferrate and activated carbon electrodes

Desalination ◽

10.1016/j.desal.2021.115172 ◽

2021 ◽

Vol 514 ◽

pp. 115172

Author(s):

Yang Xu ◽

Feng Duan ◽

Yuping Li ◽

Hongbin Cao ◽

Junjun Chang ◽

...

Keyword(s):

Activated Carbon ◽

Carbon Electrodes ◽

Capacitive Deionization ◽

Asymmetric Flow ◽

Nickel Hexacyanoferrate

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Enhanced electrochemical performances of activated carbon (AC)-nickel-metal organic framework (SIFSIX-3-Ni) composite and ion-gel electrolyte based supercapacitor

Carbon letters ◽

10.1007/s42823-020-00218-x ◽

2021 ◽

Author(s):

Kyu Seok Lee ◽

Ye Ji Seo ◽

Hyeon Taek Jeong

Keyword(s):

Activated Carbon ◽

Electrochemical Impedance ◽

Metal Organic Framework ◽

Gel Electrolyte ◽

Electrochemical Performances ◽

Galvanostatic Charge ◽

Nickel Metal ◽

Capacitive Behavior ◽

Metal Organic ◽

Ion Gel

AbstractIn this study, we investigated that the activated carbon (AC)-based supercapacitor and introduced SIFSIX-3-Ni as a porous conducting additive to increase its electrochemical performances of AC/SIFSIX-3-Ni composite-based supercapacitor. The AC/SIFSIX-3-Ni composites are coated onto the aluminum substrate using the doctor blade method and conducted an ion-gel electrolyte to produce a symmetrical supercapacitor. The electrochemical properties of the AC/SIFSIX-3-Ni composite-based supercapacitor are evaluated through cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and galvanostatic charge/discharge tests (GCD). The AC/SIFSIX-3-Ni composite-based supercapacitor showed reasonable capacitive behavior in various electrochemical measurements, including CV, EIS, and GCD. The highest specific capacitance of the AC/SIFSIX-3-Ni composite-based supercapacitor was 129 F g−1 at 20 mV s−1.

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