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等离子体辅助制备炭布负载大层间距NiCoAl-LDHs及其电化学去离子性能

姜秋彤 王国庆 李益 黄宏伟 李倩 杨建

姜秋彤, 王国庆, 李益, 黄宏伟, 李倩, 杨建. 等离子体辅助制备炭布负载大层间距NiCoAl-LDHs及其电化学去离子性能. 新型炭材料(中英文). doi: 10.1016/S1872-5805(24)60854-1
引用本文: 姜秋彤, 王国庆, 李益, 黄宏伟, 李倩, 杨建. 等离子体辅助制备炭布负载大层间距NiCoAl-LDHs及其电化学去离子性能. 新型炭材料(中英文). doi: 10.1016/S1872-5805(24)60854-1
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

等离子体辅助制备炭布负载大层间距NiCoAl-LDHs及其电化学去离子性能

doi: 10.1016/S1872-5805(24)60854-1
基金项目: 感谢国家自然科学基金 (22309081) 、江苏省自然科学基金(BK20230320)、江苏省高等学校自然科学研究项目(22KJB430005)和广东省能源转换材料与技术重点实验室项目(MATEC2023KF006)。
详细信息
    作者简介:

    姜秋彤,硕士研究生. E-mail: jqt0819@163.com

    通讯作者:

    李 倩,博士,副教授. E-mail: liqian1004@163.com

    杨 建,博士,教授. E-mail: yangjian1976@163.com

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

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).
More Information
  • 摘要: 电容去离子技术近年来被认为是一种新兴的海水淡化技术,尤其在苦咸水范围内具有经济节能的特点。然而,目前关于除氯电极的研究较少,同时缓慢的除盐动力学也制约了除氯电极的发展。本工作通过在表面酸处理后的柔性炭布上原位生长NiCoAl-LDHs纳米片阵列并进行等离子体处理,制备了具有扩大层间距的Ar-NiCoAl-LDHs@ACC材料。炭布基底抑制了NiCoAl-LDHs纳米片的团聚并提高了电导率,等离子体处理则使得NiCoAl-LDHs层间距进一步扩大并改善了亲水性,提供了快速的氯离子扩散通道,并释放了更多的层间活性位点,实现了高除盐动力学。将Ar-NiCoAl-LDHs@ACC作为除氯电极与活性碳组装了混合式电容去离子器件。在1000 mg L−1NaCl溶液及1.2 V工作电压下,除盐容量可达到93.26 mg g−1,除盐速率可达到0.27 mg g−1 s−1,电荷效率高达0.97。在300 mg L−1NaCl溶液及0.8 V工作电压下,经过100次循环后容量保持率仍在85%以上。本工作的制备策略为大层间距二维金属氢氧化物材料的可控制备和高性能电化学除氯电极的设计构建提供了新思路。
  • 图  1  Ar-NiCoAl-LDHs@ACC材料的制备示意图

    Figure  1.  Schematic diagram of the preparation of Ar-NiCoAl-LDHs@ACC materials

    图  2  (a) CC,(b) ACC,(c) NiCoAl-LDHs@ACC,(d) Ar-NiCoAl-LDHs@ACC-1,(e) Ar-NiCoAl-LDHs@ACC-2,(f) Ar-NiCoAl-LDHs@ACC-3的SEM图;(g-l)Ar-NiCoAl-LDHs@ACC-2的元素分布图

    Figure  2.  SEM images of (a) CC, (b) ACC, (c) NiCoAl-LDHs@ACC, (d) Ar-NiCoAl-LDHs@ACC-1, (e) Ar-NiCoAl-LDHs@ACC-2 and (f) Ar-NiCoAl-LDHs@ACC-3, (g-l) elemental mapping of Ar-NiCoAl-LDHs@ACC-2

    图  3  (a) CC和ACC的XPS C 1s图谱,(b) ACC, NiCoAl-LDHs@ACC, Ar-NiCoAl-LDHs@ACC-1, Ar-NiCoAl-LDHs@ACC-2 and Ar-NiCoAl-LDHs@ACC-3的XRD图谱

    Figure  3.  (a) The XPS C1s spectra of CC and ACC, (b) XRD patterns of ACC, NiCoAl-LDHs@ACC, Ar-NiCoAl-LDHs@ACC-1, Ar-NiCoAl-LDHs@ACC-2 and Ar-NiCoAl-LDHs@ACC-3

    图  4  NiCoAl-LDHs@ACC与Ar-NiCoAl-LDHs@ACC-2的 (a) 氮气吸脱附曲线和 (b) 孔径分布曲线

    Figure  4.  (a) N2 adsorption/desorption isotherms and (b) pore size distributions of NiCoAl-LDHs@ACC and Ar-NiCoAl-LDHs@ACC-2

    图  5  (a) NiCoAl-LDHs@ACC,(b) Ar-NiCoAl-LDHs@ACC-1,(c) Ar-NiCoAl-LDHs@ACC-2,(d) Ar-NiCoAl-LDHs@ACC-3的接触角

    Figure  5.  The contact angles of (a) NiCoAl-LDHs@ACC, (b) Ar-NiCoAl-LDHs@ACC-1, (c) Ar-NiCoAl-LDHs@ACC-2 and (d) Ar-NiCoAl-LDHs@ACC-3

    图  6  (a) NiCoAl-LDHs@ACC和Ar-NiCoAl-LDHs@ACC在5mV s−1下的CV曲线,(b) Ar-NiCoAl-LDHs@ACC-2在不同扫描速率下的CV曲线,(c) NiCoAl-LDHs@ACC和Ar-NiCoAl-LDHs@ACC在0.8 A g−1下的GCD曲线,(d) Ar-NiCoAl-LDHs@ACC-20 min在不同电流密度下的GCD曲线,(e) NiCoAl-LDHs@ACC和Ar-NiCoAl-LDHs@ACC在不同电流密度下的比电容,(f) Ar-NiCoAl-LDHs@ACC和Ar-NiCoAl-LDHs@ACC的EIS曲线

    Figure  6.  CV curves of (a) NiCoAl-LDHs@ACC and Ar-NiCoAl-LDHs@ACC at 5 mV s−1, and (b) Ar-NiCoAl-LDHs@ACC-2 at different scanning rates, GCD curves of (c) NiCoAl-LDHs@ACC and Ar-NiCoAl-LDHs@ACC at 0.8 A g−1, and (d) Ar-NiCoAl-LDHs@ACC-2 at different current densities, (e) the specific capacitances of NiCoAl-LDHs@ACC and Ar-NiCoAl-LDHs@ACC at different current densities, (f) EIS plots of NiCoAl-LDHs@ACC and Ar-NiCoAl-LDHs@ACC

    图  7  CDI测试系统图以及Ar-NiCoAl-LDHs@ACC除盐机理示意图

    Figure  7.  Schematic diagram of the batch mode of desalination system and the desalination mechanism of the Ar-NiCoAl-LDHs@ACC-2 for electrochemical desalination

    图  8  Ar-NiCoAl-LDHs@ACC-2//AC和NiCoAl-LDHs@ACC//AC系统在(a) 1.2 V下1000 mg L−1的NaCl溶液中的电导率瞬态,(b) 1000 mg L−1的NaCl溶液中在不同工作电压下的除盐容量与除盐速率,(c) 1.2 V 的工作电压下在不同NaCl溶液浓度中的除盐容量与除盐速率,(d) 1.2 V下1000 mg L−1的NaCl溶液中的电流瞬态,(e) 1000 mg L−1的NaCl溶液中在不同工作电压下的电荷效率与能耗,(f) 1.2 V 的工作电压下在不同NaCl溶液浓度中的电荷效率与能耗,(g) Ragone 图,(h) Ar-NiCoAl-LDHs@ACC-2//AC系统在300 mg L−1的NaCl溶液中1.2V下的循环性能图

    Figure  8.  (a) Conductivity variation of Ar-NiCoAl-LDHs@ACC-2//AC and NiCoAl-LDHs@ACC//AC at 1.2 V in 1000 mg L−1 NaCl solution, the desalination capacity and desalination rate of Ar-NiCoAl-LDHs@ACC-2//AC and NiCoAl-LDHs@ACC//AC at different (b) operational voltages and (c) NaCl concentrations, (d) current variation of Ar-NiCoAl-LDHs@ACC-2//AC and NiCoAl-LDHs@ACC//AC at 1.2 V in 1000 mg L−1 NaCl solution, the charge efficiency and energy consumption of Ar-NiCoAl-LDHs@ACC-2//AC and NiCoAl-LDHs@ACC//AC at different (e) operational voltages and (f) NaCl concentrations, (g) Ragone plots between desalination capacity and desalination rate, (h) cycling performance of the Ar-NiCoAl-LDHs@ACC-2//AC

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  • 收稿日期:  2024-03-14
  • 录用日期:  2024-04-11
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  • 网络出版日期:  2024-04-16

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