Hierarchical Ag Coating on Active Zinc Metal Powder Anodes via Galvanic Replacement for High‐Performance Aqueous Zn‐Ion Batteries DOI Creative Commons

Hee Bin Jeong,

Yerim Kim,

Geunwoo Kim

и другие.

Small Structures, Год журнала: 2025, Номер unknown

Опубликована: Апрель 15, 2025

The energy storage performance of aqueous Zn‐ion batteries (AZIBs) is heavily influenced by the condition Zn metal anode. While using powder (ZnMP) with a larger surface area, as opposed to foil, can enhance density AZIBs, it also introduces surface‐related stability challenges. increased area ZnMP leads more severe side reactions induced free water and protruding dendrite growth, negatively impacting long‐term cyclability. To address these issues, Ag nanosheets (AgNSs) controlled size are uniformly coated onto via simple galvanic replacement reaction (GRR) between Zn. Additionally, trisodium citrate dihydrate (TCD) used stabilizer (a metal‐chelating agent) regulate GRR rate. slower rate introduced TCD ensures uniform even deposition AgNSs over ZnMP. resulting AgNS‐coated (Ag@ZnMP) anodes exhibit superior electrochemical properties, including higher densities, reduced hydrogen evolution, improved cycling. A Ag@ZnMP symmetric cell demonstrates outstanding operational stability, maintaining for 800 h at current 2 mA cm −2 capacity 1 mAh . Furthermore, Ag@ZnMP||MnO full‐cell substantially enhances overall battery performance.

Язык: Английский

Novel Anchored Branched Polymer Coating Layers for Enhanced Redox Kinetics in Aqueous Zinc‐Ion Batteries DOI Creative Commons

Hyeong Seop Jeong,

Dong Il Kim, Wooseok Lee

и другие.

Energy & environment materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 15, 2025

The fundamental issues associated with Zn anodes prevent the commercialization of aqueous ion batteries. To address this, a simple dip‐coating method was used to coordinate thin layer branched polyethyleneimine (b‐PEI) polymer onto electrode surface. This process increases hydrophilicity and reduces interfacial resistance between electrolyte. Consequently, electrolyte leaching from hydrophilic coating is prevented, charge distribution uniform, stable electrochemical performance maintained over extended periods. In symmetric cell testing, b‐PEI@Zn anode exhibits lifespan 1400 h (3 mA cm −2 , 1 mAh ). Furthermore, full‐cell tests, demonstrates higher capacity (+26.05%) improved stability (95.4%) compared bare (0.5 A g −1 study presents practical surface modification strategy for underscores potential innovative polymer‐based coatings battery applications.

Язык: Английский

Процитировано

2
A New strategy for stabilizing zinc metal Anodes: Using grain boundaries to strengthen grain boundaries DOI
Jiachi Zhang, Zeping Liu, Bowen Zhang

и другие.

Chemical Engineering Journal, Год журнала: 2025, Номер unknown, С. 160157 - 160157

Опубликована: Фев. 1, 2025

Язык: Английский

Процитировано

0
Work Function Engineering of Copper Sulfides for 2D Electronics DOI Creative Commons

Hongju Park,

Jungmoon Lim, Taehun Kim

и другие.

Small Structures, Год журнала: 2025, Номер unknown

Опубликована: Апрель 18, 2025

Achieving ideal metal/semiconductor junctions remains a critical challenge in advancing 2D electronics. While current approaches often rely on clean van der Waals contact interfaces to mitigate Fermi‐level pinning, they offer limited tunability achieving precise energy level alignment with semiconductors. In this work, wide range of work function modulation copper sulfide (Cu 2− x S, 0 ≤ X < 1) electrode materials is proposed that can be achieved through an air‐ambient sulfurization process. Depending the concentration sulfur atoms, Cu S showed considerable from 5.10 4.15 eV (ΔΦ = 950 meV). The continuous tunable electrodes enables junction interface ohmic properties both n‐type and p‐type transition metal dichalcogenides materials. Our efficient engineering strategy provides innovative way design electronics for development integrated devices.

Язык: Английский

Процитировано

0
Hierarchical Ag Coating on Active Zinc Metal Powder Anodes via Galvanic Replacement for High‐Performance Aqueous Zn‐Ion Batteries DOI Creative Commons

Hee Bin Jeong,

Yerim Kim,

Geunwoo Kim

и другие.

Small Structures, Год журнала: 2025, Номер unknown

Опубликована: Апрель 15, 2025

The energy storage performance of aqueous Zn‐ion batteries (AZIBs) is heavily influenced by the condition Zn metal anode. While using powder (ZnMP) with a larger surface area, as opposed to foil, can enhance density AZIBs, it also introduces surface‐related stability challenges. increased area ZnMP leads more severe side reactions induced free water and protruding dendrite growth, negatively impacting long‐term cyclability. To address these issues, Ag nanosheets (AgNSs) controlled size are uniformly coated onto via simple galvanic replacement reaction (GRR) between Zn. Additionally, trisodium citrate dihydrate (TCD) used stabilizer (a metal‐chelating agent) regulate GRR rate. slower rate introduced TCD ensures uniform even deposition AgNSs over ZnMP. resulting AgNS‐coated (Ag@ZnMP) anodes exhibit superior electrochemical properties, including higher densities, reduced hydrogen evolution, improved cycling. A Ag@ZnMP symmetric cell demonstrates outstanding operational stability, maintaining for 800 h at current 2 mA cm −2 capacity 1 mAh . Furthermore, Ag@ZnMP||MnO full‐cell substantially enhances overall battery performance.

Язык: Английский

Процитировано

0