Anion Storage of MXenes

Wang, Guanyao; Park, Jae Min; Kang, Tong‐Hyun; Lee, Sang Joon; Park, Ho Seok

doi:10.1002/smtd.202201440

Cited by 13 publications

(6 citation statements)

References 94 publications

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“…The Lin et al study 54 also demonstrates that MXene layers can intercalate TFSI − anions due to the electrostatic attraction under positive polarization in an EMI-TFSI ionic liquid electrolyte. Wang et al 55 concluded that the accommodation of positively charged components (e.g., metal cations and positively charged g-C 3 N 4 ) into MXene-based materials is a viable approach to avoid the electrostatic repulsion between anions and MXenes, thus endowing MXenes with excellent [AlCl 4 ] − trapping capability for Al-ion batteries.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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

Tan

Wang

et al. 2023

ACS Appl. Mater. Interfaces

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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 (Ti 3 C 2 T x ) interlayers, we enable the fabricated MXene/BC@PPy (MBP) composite films to be highly efficient anodes for Cl − -capturing in asymmetric capacitive deionization (CDI) systems. Performance 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.

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Section: ■ Results and Discussionmentioning

confidence: 99%

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

Tan

Wang

et al. 2023

ACS Appl. Mater. Interfaces

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“…A high-potential triphenylphosphine selenide organic cathode (TP-Se) was reported as the cathode of DIBs [181], and (TP-Se) − to (TP-Se) 0 to (TP-Se) + conversion could be used to store anions. MOF [182], and MXenes [183] were reported as dual-ion hosts.…”

Section: Conversion-type Cathodesmentioning

confidence: 99%

Anion-hosting cathodes for current and late-stage dual-ion batteries

Zhang,

Zhang

et al. 2024

Sci. China Chem.

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Anion-hosting cathodes capable of reversibly storing large-size anions play a leading role in dual-ion batteries (DIBs). The purpose of the present review is to summarize the most promising anion-hosting cathodes for current and late-stage DIBs. This review first summarizes the developments in conventional graphite cathodes, especially the latest advances in the graphiterelated research. Next, organic cathodes for the anion storage are discussed, including aromatic amine polymers, heterocyclic polymers, bipolar compounds, and all-carbon-unsaturated compounds. Then, the review focuses on the conversion-type cathodes with high theoretical specific capacities. Finally, the future research directions of the cathodes of DIBs are proposed.

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“…), and periodically arrayed interlayers. [38,40] The fabrication diagram of the I 2 /MXene cathode is shown in Figure 3e. They demonstrate that there are three possible iodine/polyiodide species adsorption sites (Nb, C, and T x (O), Figure 3f − on Nb site and density of states (DOS) patterns near the Fermi energy (E f ) around Nb site further verify the strong interaction between iodine/polyiodide species and Nb 2 CT x host.…”

Section: Advanced Cathode Framework Constructionmentioning

confidence: 99%

Aqueous Rechargeable Zn–Iodine Batteries: Issues, Strategies and Perspectives

Han,

Chen,

et al. 2023

Small

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The static aqueous rechargeable Zn–Iodine batteries (ARZiBs) have been studied extensively because of their low‐cost, high‐safety, moderate voltage output, and other unique merits. Nonetheless, the poor electrical conductivity and thermodynamic instability of the iodine cathode, the complicated conversion mechanism, and the severe interfacial reactions at the Zn anode side induce their low operability and unsatisfactory cycling stability. This review first clarifies the typical configuration of ARZiBs with a focus on the energy storage mechanism and uncovers the issues of the ARZiBs from a fundamental point of view. After that, it categorizes the recent optimization strategies into cathode fabrication, electrolyte modulation, and separator/anode modification; and summarizes and highlights the achieved progress of these strategies in advanced ARZiBs. Given that the ARZiBs are still at an early stage, the future research outlook is provided, which hopefully may guide the rational design of advanced ARZiBs.

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Anion Storage of MXenes

Cited by 13 publications

References 94 publications

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

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

Anion-hosting cathodes for current and late-stage dual-ion batteries

Aqueous Rechargeable Zn–Iodine Batteries: Issues, Strategies and Perspectives

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