Enhanced performance stability of carbon/titania hybrid electrodes during capacitive deionization of oxygen saturated saline water

Srimuk, Pattarachai; Zeiger, Marco; Jäckel, Nicolas; Tolosa, Aura; Krüner, Benjamin; Fleischmann, Simon; Grobelsek, Ingrid; Aslan, Mesut; Shvartsev, Boris; Suss, Matthew E.; Presser, Volker

doi:10.1016/j.electacta.2016.12.060

Cited by 109 publications

(67 citation statements)

References 99 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Experiments were conducted with aerated and deaerated feed water. Clearly, a decrease of desalination performance is observed over time, which is for the aerated case stronger than for the deaerated case, and is in agreement with other studies [3,64,100,120,170,171]. After 45 hours of desalination, for the aerated case, salt adsorption becomes negative, which means that salt is adsorbed during discharge (charging voltage 0 V), and desorbed during charging (discharge …”

Section: CDIsupporting

confidence: 90%

“…Capacitive deionization (CDI) is an electrochemical technology to adsorb ions from solution by alternately charging and discharging two electrodes [1][2][3][4][5][6][7][8][9][10]. During the charging step, a charging voltage is applied between two electrodes.…”

Section: Capacitive Deionizationmentioning

confidence: 99%

“…Thus, instead of modeling ion transport and adsorption in an electrolyte that contains one monovalent salt, such as NaCl or KCl, we study 3 Main focus on indicated mode, but the other mode is also employed. 4 i-mD model was used, but was matched with the amph-D model, see Box 4.1.…”

Section: Outline Of This Thesismentioning

confidence: 99%

“…3.8, we calculated the energy consumption by integrating the electrical power (current multiplied by cell voltage) over time, and dividing the resulting value by the salt adsorption in a cycle (in mol). 3 The ionic resistance is calculated according to the aforementioned equation; we will re-analyze this case in Chapter 8 and come to a different conclusion The resulting values are plotted in Fig. 3.9 4 .…”

Section: Improved System Design: Increased Electrode Thicknessmentioning

confidence: 99%

“…Whereas MCDI has shown stable long-term performance [102], CDI shows a declining desalination performance over time, especially if dissolved oxygen is present in the feed water [3,64,100,120,170,171]. This decrease in desalination performance has been mainly attributed to faradaic reactions involving carbon oxidation [63][64][65].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Desalination with porous electrodes : Mechanisms of ion transport and adsorption

Dykstra¹

View full text Add to dashboard Cite

Section: CDIsupporting

confidence: 90%

Section: Capacitive Deionizationmentioning

confidence: 99%

Section: Outline Of This Thesismentioning

confidence: 99%

Section: Improved System Design: Increased Electrode Thicknessmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Desalination with porous electrodes : Mechanisms of ion transport and adsorption

Dykstra¹

View full text Add to dashboard Cite

Rapid Inversion of Surface Charges in Heteroatom‐Doped Porous Carbon: A Route to Robust Electrochemical Desalination

Kang

Kim

Chung

et al. 2019

Adv Funct Materials

View full text Add to dashboard Cite

Given that a considerably large population suffers from shortage of water, there are numerous on‐going efforts to turn seawater into freshwater, and electrochemical desalination processes—particularly capacitive deionization (CDI)—have gained significant attention due to their high energy efficiency and reliable performance. Meanwhile, carbonaceous electrode materials, which are most commonly used in CDI systems, have poor long‐term stability due to unfavorable interactions with oxygen in saline water. Herein, rapid and vigorous inversion of surface charges in heteroatom‐doped carbon electrodes, which leads to a robust operation of CDI with high desalination capacity, is reported for the first time. By carbonization of coffee wastes, nitrogen‐ and sulfur‐codoped activated carbon with hierarchical micro/mesopores are prepared in an environmentally‐friendly manner, and this carbon results in a significantly higher inverted capacity than that of various activated carbon counterparts in long‐term CDI operations, without any sign of drop in performance. Investigations on the changes in physicochemical properties of the electrodes during the inversion disclose the favorable roles of nitrogen and sulfur dopants, which can be summarized as enlarging the difference between the surface charges of the two electrodes by chemical interactions with oxygen in the anode and carbon in the cathode.

show abstract

A Reverse‐Defect‐Engineering Strategy toward High Edge‐Nitrogen‐Doped Nanotube‐Like Carbon for High‐Capacity and Stable Sodium Ion Capture

Liang

Liu

Zhang

et al. 2022

Adv Funct Materials

View full text Add to dashboard Cite

Developing high‐performance defect‐rich carbon materials with abundant accessible active sites is exceedingly vital for electrochemical water desalination, but this still remains a significant challenge. Herein, a reverse‐defect‐engineering strategy is reported to synthesize high edge‐nitrogen‐doped nanotube‐like carbon through the annealing process of protonated g‐C3N4 under H2 atmosphere. The hydrogen bonds interaction between the proton and nitrogen atoms performs a crucial role in regulating nitrogen configurations. The nitrogen‐doped carbon obtained from HCl pretreatment (HCl‐NC) reduces the proportion of graphitic N and exhibits a high ratio of pyrrolic N to pyridinic N. Thus, the resulting synergetic structure of high edge‐type N and small graphitic carbon nanodomains ensures more accessible active sites and fast charge‐transfer kinetics simultaneously, contributing to high desalination capacity (100.3 mg g−1 at 1.2 V), fast time‐average specific adsorption rate (1.7 mg g−1 min−1), low energy consumption (82.9 kJ molNaCl−1), and superior cyclic stability (no signs of performance decay after long‐term cycling). The Na+‐intercalation mechanism and structure‐response relationship of HCl‐NC are revealed by the electrochemical quartz crystal microbalance with dissipation monitoring and density functional theory calculations, respectively. This study provides a novel idea to modulate the nanotube‐like, nitrogen‐containing configurations for engineering carbon nanomaterials for advanced electrochemical applications.

show abstract

Enhanced performance stability of carbon/titania hybrid electrodes during capacitive deionization of oxygen saturated saline water

Cited by 109 publications

References 99 publications

Desalination with porous electrodes : Mechanisms of ion transport and adsorption

Desalination with porous electrodes : Mechanisms of ion transport and adsorption

Rapid Inversion of Surface Charges in Heteroatom‐Doped Porous Carbon: A Route to Robust Electrochemical Desalination

A Reverse‐Defect‐Engineering Strategy toward High Edge‐Nitrogen‐Doped Nanotube‐Like Carbon for High‐Capacity and Stable Sodium Ion Capture

Contact Info

Product

Resources

About