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| Hierarchical MXene/Polypyrrole-Decorated Carbon Nanofibers for Asymmetrical Capacitive Deionization | |
| Wang, Xun-rui1,2; Wang, Xiang2; Nian, Hong-en3; Chen, Tong4; Zhang, Lin5; Song, Shuang1,2; Li, Jin-hong1; Wang, Yu2 | |
| 2022-11-17 | |
| Source Publication | ACS APPLIED MATERIALS & INTERFACES
 |
| ISSN | 1944-8244 |
| Pages | 15 |
| Abstract | Membrane capacitive deionization (MCDI) has emerged as a promising electric-field-driven technology for brackish water desalination and specific salt or charged ion separation. The use of carbon-based or pseudocapacitive materials alone for MCDI usually suffers from the drawbacks of low desalination capacity and poor cycling stability due to their limited accessible adsorption sites and obstructed charge-carrier diffusion pathways. Therefore, developing a hybrid electrode material with multiple charge storage mechanisms and continuous electron/ion transport pathways that can synergistically improve its specific capacitance and cycling durability has currently become one of the most critical technical demands. Herein, we developed a novel hierarchically architectured hybrid electrode by first spinning MXene into polyacrylonitrile (PAN)-based carbon nanofibers (MCNFs) to obtain a highly conductive carbon nanocomposite framework. The excellent spatial support structure can effectively prevent the dense packing of Cl-- and DBS--doped polypyrrole (PPy) molecular chains during the following electrodeposition process, which not only ensures the efficient transport of electrons in the continuous hybrid carbon nanofibrous skeleton but also provides abundant accessible sites for ion adsorption and insertion. The obtained self-supporting membrane electrodes (MCNF@PPy+Cl- and MCNF@PPy+DBS-) have the advantages of outstanding specific capacitance (318.4 and 153.9 F/g, respectively), low charge transfer resistance (10.0 and 5.3 omega , respectively), and excellent cycling performance (78% and 90% capacitance retention ratios, respectively, after 250 electrochemical cycles). Furthermore, the asymmetrical membrane electrodes showed a superior desalination capacity of 91.2 mg g-1 in 500 mg/L NaCl aqueous solution and obvious divalent ion (Ca2+ , Mg2+) selective adsorption properties in high-salt water from the cooling towers of thermal power plants. |
| Keyword | membrane capacitive deionization MXene ion-doped polypyrrole electrodeposition brackish water desalination |
| DOI | 10.1021/acsami.2c14999 |
| Language | 英语 |
| WOS Keyword | ELECTRODE MATERIALS ; WATER DESALINATION ; POLYPYRROLE ; SUPERCAPACITORS ; STABILITY ; ENERGY ; POLYANILINE ; SYNERGY ; SULFUR ; MXENE |
| Funding Project | National Natural Science Foundation of China ; Joint Youth Research Program of Guangdong Province, China ; S & T plan of QingHai Salt Lake Industry Co., Ltd. ; [22105206] ; [21875256] ; [2019A1515110185] ; [10000000- 22-ZC0609-0002] |
| WOS Research Area | Science & Technology - Other Topics ; Materials Science |
| WOS Subject | Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary |
| Funding Organization | National Natural Science Foundation of China ; Joint Youth Research Program of Guangdong Province, China ; S & T plan of QingHai Salt Lake Industry Co., Ltd. |
| WOS ID | WOS:000887953900001 |
| Publisher | AMER CHEMICAL SOC |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.ipe.ac.cn/handle/122111/55621 |
| Collection | 中国科学院过程工程研究所 |
| Corresponding Author | Wang, Xiang; Li, Jin-hong; Wang, Yu |
| Affiliation | 1.China Univ Geosci, Sch Mat Sci & Technol, Beijing Key Lab Mat Utilizat Nonmet Minerals & Sol, Natl Lab Mineral Mat, Beijing 100083, Peoples R China 2.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China 3.Chinese Acad Sci, Qinghai Inst Salt Lakes, Key Lab Comprehens & Highly Efficient Utilizat Sal, Xining 266000, Qinghai, Peoples R China 4.China Met Geol Bur, Inst Mineral Resources Res, Beijing 101300, Peoples R China 5.China Energy Investment Corp, Zhunneng Gangue Power Co, Ordos 010300, Inner Mongolia, Peoples R China |
| Recommended Citation GB/T 7714 | Wang, Xun-rui,Wang, Xiang,Nian, Hong-en,et al. Hierarchical MXene/Polypyrrole-Decorated Carbon Nanofibers for Asymmetrical Capacitive Deionization[J]. ACS APPLIED MATERIALS & INTERFACES,2022:15. |
| APA | Wang, Xun-rui.,Wang, Xiang.,Nian, Hong-en.,Chen, Tong.,Zhang, Lin.,...&Wang, Yu.(2022).Hierarchical MXene/Polypyrrole-Decorated Carbon Nanofibers for Asymmetrical Capacitive Deionization.ACS APPLIED MATERIALS & INTERFACES,15. |
| MLA | Wang, Xun-rui,et al."Hierarchical MXene/Polypyrrole-Decorated Carbon Nanofibers for Asymmetrical Capacitive Deionization".ACS APPLIED MATERIALS & INTERFACES (2022):15. |
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