Plasma-assisted preparation of NiCoAl-LDHs with enhanced interlayer space on carbon cloth for electrochemical deionization

JIANG Qiu-tong; WANG Guo-qing; LI Yi; HUANG Hong-wei; LI Qian; YANG Jian

doi:10.1016/S1872-5805(24)60854-1

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JIANG Qiu-tong, WANG Guo-qing, LI Yi, HUANG Hong-wei, LI Qian, YANG Jian. Plasma-assisted preparation of NiCoAl-LDHs with enhanced interlayer space on carbon cloth for electrochemical deionization. New Carbon Mater.. doi: 10.1016/S1872-5805(24)60854-1

Citation:

JIANG Qiu-tong, WANG Guo-qing, LI Yi, HUANG Hong-wei, LI Qian, YANG Jian. Plasma-assisted preparation of NiCoAl-LDHs with enhanced interlayer space on carbon cloth for electrochemical deionization. New Carbon Mater.. doi: 10.1016/S1872-5805(24)60854-1

Citation:

JIANG Qiu-tong, WANG Guo-qing, LI Yi, HUANG Hong-wei, LI Qian, YANG Jian. Plasma-assisted preparation of NiCoAl-LDHs with enhanced interlayer space on carbon cloth for electrochemical deionization. New Carbon Mater.. doi: 10.1016/S1872-5805(24)60854-1

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Plasma-assisted preparation of NiCoAl-LDHs with enhanced interlayer space on carbon cloth for electrochemical deionization

doi: 10.1016/S1872-5805(24)60854-1

JIANG Qiu-tong^{1, 2
,},
WANG Guo-qing^{1, 2},
LI Yi^{1, 2},
HUANG Hong-wei^{1, 2},
LI Qian^{1, 2
,
,},
YANG Jian^{1, 2
,
,}

1.
College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, China
2.
Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 211816, China

Funds: National Natural Science Foundation of China (22309081), Natural Science Foundation of Jiangsu Province (BK20230320), Natural Science Research in Colleges and universities of Jiangsu Province (22KJB430005), Open Project Fund from Guangdong Provincial Key Laboratory of Materials and Technology for Energy Conversion, and Guangdong Technion-Israel Institute of Technology (MATEC2023KF006).

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Author Bio:
JIANG Qiu-tong, postgraduate student. E-mail: jqt0819@163.com
Corresponding author: LI Qian, Ph. D, Associate Professor. E-mail: liqian1004@163.com; YANG Jian. Ph. D, Professor. E-mail: yangjian1976@163.com
Received Date: 2024-03-14
Accepted Date: 2024-04-11
Rev Recd Date: 2024-04-10

Available Online: 2024-04-16

Abstract

Abstract

Capacitive deionization technology has been considered as an emerging desalination technique in recent years, especially for its economic and energy-saving characteristics within the brackish water range. However, there are currently few studies on chloride ion removal electrodes, and the slow desalination kinetics limits their development. In this work, Ar-NiCoAl-LDHs@ACC materials with enhanced interlayer space were prepared by in-situ growth of NiCoAl-LDHs nanosheets arrays on acid-treated carbon cloth and subsequent argon plasma treatment. The carbon cloth suppresses the agglomeration of NiCoAl-LDHs nanosheets and improves the electrical conductivity, while the plasma treatment further expands the interlayer space of NiCoAl-LDHs and enhances the hydrophilicity. This provides a rapid diffusion channel and more interlayer active sites for chloride ions, achieving high desalination kinetics. A hybrid capacitive deionization (HCDI) cell was assembled using the Ar-NiCoAl-LDHs@ACC as chloride ion removal electrode and activated carbon as sodium ion removal electrode. This HCDI cell achieves a high desalination capacity of 93.26 mg g⁻¹ at 1.2 V in 1000 mg L⁻¹ NaCl solution, remarkable desalination rate of 0.27 mg g⁻¹ s⁻¹, and good charge efficiency of 0.97. In 300 mg L⁻¹ NaCl solution at 0.8 V, the capacity retention rate remains above 85% after 100 cycles. This work provides new ideas for the controllable preparation of two-dimensional metal hydroxide materials with large interlayer space and the design of high-performance electrochemical chlorine ion removal electrodes.
- Electrochemical deionization,
- Desalination,
- Enhanced interlayer space,
- NiCoAl-LDHs,
- High desalination kinetics

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References(40)

References

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