Regulation of Ion Transport Behavior in Layer‐by‐Layer Assembled Polymer/MXene Heterostructure Anodes for Metal‐Free Aqueous Zinc Ion Batteries

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 10, 2025

Abstract Recently, the development of Zn‐host materials in metal‐free aqueous Zinc ion batteries (AZIBs) has emerged as an effective strategy to address challenges uncontrollable dendrite growth and severe corrosion Zn anodes. Herein, layer‐by‐layer assembly conjugated polyimide nanocomposite (PTN‐MXene) through situ polymerization is proposed realize high energy density stability AZIBs. Specifically, unique layered structure abundant redox centers diketone‐based (PTN), combined with its structural compatibility MXene, enable formation a assembled 2D/2D heterostructure. This design ensures sufficient contact expands interlayer spacing facilitating faster electron/ion transport kinetics providing better access centers. Importantly, regulation behavior from H + or 2+ /Zn coinsertion PTN‐MXene achieved verified by different characterization techniques. Thus, anode exhibits specific capacity (283.4 mAh g −1 at 0.1 A ), excellent rate performance outstanding cycling performance. As proof‐of‐concept, full fabricated Prussian blue analogs cathode deliver 72.4 Wh kg exceptional over 2000 cycles.

Language: Английский

Basics and Advances of Manganese‐Based Cathode Materials for Aqueous Zinc‐Ion Batteries

Chemistry - A European Journal, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 12, 2024

It is greatly crucial to develop low-cost energy storage candidates with high safety and stability replace alkali metal systems for a sustainable future. Recently, aqueous zinc-ion batteries (ZIBs) have received tremendous interest owing their low cost, safety, wide oxidation states, sophisticated fabrication process. Nanostructured manganese (Mn)-based oxides in different polymorphs are the potential cathode materials widespread application of ZIBs. However, Mn-based oxide suffer from several drawbacks, such as electronic/ionic conductivity poor cycling performance. To overcome these issues, various structural modification strategies been adopted enhance electrochemical activity, including phase/defect engineering, doping foreign atoms (e. g., and/or nonmetal atoms), coupling carbon or conducting polymers. Herein, this review targets summarize advantages disadvantages above-mentioned improve performance cathodic part The challenges suggestions development ZIBs put forward.

Language: Английский