文献类型：期刊文献

英文题名：Interlayer Structure and Chemistry Engineering of MXene-Based Anode for Effective Capture of Chloride Anions in Asymmetric Capacitive Deionization

作者：Xu, Wenyu[1] Tan, Chang[1] Wang, Ao[2] Hu, Shengchun[2] Deng, Libo[3] Boles, Steven[4] Sun, Kang[2] Li, Bei[2] Hu, Haibo[1]

第一作者：Xu, Wenyu

通信作者：Hu, HB[1];Li, B[2]

机构：[1]Anhui Univ, Sch Mat Sci & Engn, Hefei 230601, Peoples R China;[2]Chinese Acad Forestry, Inst Chem Ind Forest Prod, Nanjing 210042, Peoples R China;[3]Shenzhen Univ, Coll Chem & Environm Engn, Shenzhen 518060, Peoples R China;[4]Norwegian Univ Sci & Technol, Dept Energy & Proc Engn, N-7491 Trondheim, Norway

年份：2023

卷号：15

期号：12

起止页码：16266-16276

外文期刊名：ACS APPLIED MATERIALS & INTERFACES

收录：;EI(收录号：20231213790084);Scopus(收录号：2-s2.0-85150415272);WOS:【SCI-EXPANDED(收录号:WOS:000954489300001)】；

基金：This work was financed by the National Natural Science Foundation of China (52100009 and 51871001), the Excellent Youth Fund of Anhui Province (2108085Y17), the Innovation and Entrepreneurship Support Plan of Anhui Province for Returned Personnel Studying Abroad (2022LCX001), a Project supported by the Program of State Key Laboratory of Quantum Optics and Quantum Optics Devices (KF202212), and the Hundred-Talent Program of Anhui Province.

语种：英文

外文关键词：asymmetric capacitive deionization; MXene; anode; polypyrrole; chloride capture

摘要：Negatively charged surfaces and readily oxidizabile characteristics fundamentally restrict the use of MXene building blocks as anodes for anion intercalation. Herein, by embedding bacterial cellulose nanofibers with conformal polypyrrole coating (BC@PPy) and populating them between MXene (Ti3C2Tx) interlayers, we enable the fabricated MXene/BC@PPy (MBP) composite films to be highly efficient anodes for Cl--capturing in gains are realized due to the surface electronegativity of MXene nanosheets becoming compensated by positively charged BC@PPy nanofibers, alleviating electrostatic repulsion, thus realizing reversible Cl- intercalation. More crucially, the anodization voltage of MBP is effectively enhanced as a result of the increase of the Ti valence state in MXene nanosheets with the addition of the BC@ PPy spacer. Furthermore, BC@PPy nanopillars effectively enlarge the interlayer space for facile Cl- de-/intercalation, improve the vertical electron transfer between loosely deposited MXene nanosheets, and perform as additional active materials for Cl--capturing. Consequently, the MBP anode exhibits a promising desalination capacity of up to 17.56 mg g-1 at 1.2 V with a high capacity retention of 94.6% after 30 cycles in an asymmetric CDI system. This work offers a simple and effective strategy to unlock the application potential of MXene building blocks as anodes for Cl--capturing in electrochemical desalination.