Selective Potassium Deposition Enables Dendrite‐Resistant Anodes for Ultrastable Potassium‐Metal Batteries

Advanced Materials, Год журнала: 2023, Номер 35(30)

Опубликована: Апрель 17, 2023

Instability at the solid electrolyte interface (SEI) and uncontrollable growth of potassium dendrites have been pressing issues for potassium-ion batteries. Herein, a self-supporting electrode composed bismuth nitrogen-doped reduced graphene oxide (Bi80 /NrGO) is designed as an anode host potassium-metal Following molten diffusion into Bi80 /NrGO, resulting K@Bi80 /NrGO exhibits unique hollow pores that provide K+ -diffusion channels deposition space to buffer volume expansion, thus maintaining structure SEI stability. The also provides controlled electric field promotes uniform flux, abundant potassiophilic N sites, Bi alloying active collectively enabling precise nucleation selective achieve dendrite-resistant anodes. With /NrGO-based optimized electrodes, assembled symmetrical cells can sustain stable cycling over 3000 h current density 0.2 mA cm-2 . Full with Prussian blue cathode exhibit high stability (with no degradation 1960 cycles 1000 g-1 ) 99% Coulombic efficiency. This work may lead design anodes triple attributes nucleation, smooth diffusion, dendrite inhibition, ideal developing beyond.

Язык: Английский

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Co-activation for enhanced K-ion storage in battery anodes

National Science Review, Год журнала: 2023, Номер 10(7)

Опубликована: Апрель 25, 2023

The relative natural abundance of potassium and potentially high energy density has established potassium-ion batteries as a promising technology for future large-scale global storage. However, the anodes' low capacity discharge platform lead to density, which impedes their rapid development. Herein, we present possible co-activation mechanism between bismuth (Bi) tin (Sn) that enhances K-ion storage in battery anodes. co-activated Bi-Sn anode delivered 634 mAh g

Язык: Английский

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Advanced anode materials for potassium batteries: Sorting out opportunities and challenges by potassium storage mechanisms

Matter, Год журнала: 2023, Номер 6(10), С. 3220 - 3273

Опубликована: Авг. 9, 2023

Язык: Английский

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Mixed-biomass engineering achieves multi-doped highly-disordered hierarchical flower-like hard carbon for advanced potassium-ion battery

Nano Energy, Год журнала: 2023, Номер 117, С. 108913 - 108913

Опубликована: Сен. 16, 2023

Язык: Английский

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Building Stable Solid‐State Potassium Metal Batteries

Advanced Materials, Год журнала: 2024, Номер 36(24)

Опубликована: Янв. 31, 2024

Abstract Solid‐state potassium metal batteries (SPMBs) are promising candidates for the next generation of energy storage systems their low cost, safety, and high density. However, full SPMBs not yet reported due to K dendrites, interfacial incompatibility, limited availability suitable solid‐state electrolytes. Here, stable using a new iodinated solid polymer electrolyte (ISPE) presented. The functional ions reconstruct ion transport channels, providing efficient transport. ISPE shows combination ionic conductivity, superior compatibility, electrochemical stability. In situ alloying interlayer increase compatibility prolonged cycling with polarization. Moreover, enables Prussian blue cathode operation at voltage 4.5 V, rate capability, long‐term over 3000 cycles (4.2 V vs + /K) an ultra‐high coulombic efficiency 99.94%. More importantly, classic pouch cell achieves 4.2 800 retention 93.6%, presenting development strategy secure high‐performance rechargeable batteries.

Язык: Английский

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Nonflammable Phosphate‐Based Electrolyte for Safe and Stable Potassium Batteries Enabled by Optimized Solvation Effect

Angewandte Chemie International Edition, Год журнала: 2024, Номер 63(29)

Опубликована: Май 6, 2024

Abstract Current potassium‐ion batteries (PIBs) are limited in safety and lifetime owing to the lack of suitable electrolyte solutions. To address these issues, herein, we report an innovative non‐flammable design strategy that leverages optimal moderate solvation phosphate‐based solvent which strikes a balance between capability salt dissociation ability, leading superior electrochemical performance. The formulated simultaneously exhibits advantages low concentration (only 0.6 M), viscosity, high ionic conductivity, oxidative stability, safety. Our also promotes formation self‐limiting inorganic‐rich interphases at anode surface, alongside robust cathode‐electrolyte interphase on iron‐based Prussian blue analogues, mitigating electrode/electrolyte side reactions preventing Fe dissolution. Notably, PIBs employing our exhibit exceptional durability, with 80 % capacity retention after 2,000 cycles high‐voltage 4.2 V coin cell. Impressively, larger scale pouch cell, it maintains over 81 its initial 1,400 1 C‐rate average Coulombic efficiency 99.6 %. This work represents significant advancement toward realization safe, sustainable, high‐performance PIBs.

Язык: Английский

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Sustainable Electrolytes: Design Principles and Recent Advances

Chemistry - A European Journal, Год журнала: 2024, Номер 30(36)

Опубликована: Апрель 24, 2024

Today, rechargeable batteries are omnipresent and essential for our existence. In order to improve the electrochemical performance of electric fields, introduction electrolytes with fluorine (F)-based inorganic elemental compositions is a direction exploration. However, most fluorocarbons have high global warming potential ozone depletion potential, which do not meet sustainability requirements battery industry. Therefore, developing sustainable viable option future development. Although researchers made much progress in electrolyte optimization, little attention has been paid low-toxic safe electrolytes. This review aims elucidate design principles recent advances this solvents salts. It concludes summary outlook on research directions molecular green practical high-voltage batteries.

Язык: Английский

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Restructuring Electrolyte Solvation by a Partially and Weakly Solvating Cosolvent toward High-Performance Potassium-Ion Batteries

ACS Nano, Год журнала: 2024, Номер 18(19), С. 12512 - 12523

Опубликована: Май 3, 2024

Ether-based electrolytes are among the most important for potassium-ion batteries (PIBs) due to their low polarization voltage and notable compatibility with potassium metal. However, development is hindered by strong binding between K+ ether solvents, leading [K+–solvent] cointercalation on graphite anodes. Herein, we propose a partially weakly solvating electrolyte (PWSE) wherein local solvation environment of conventional 1,2-dimethoxyethane (DME)-based efficiently reconfigured diethoxy methane (DEM) cosolvent. For PWSE in particular, DEM participates shell weakens chelation DME, facilitating desolvation suppressing behavior. Notably, structure DME-based transformed into more cation–anion–cluster-dominated structure, consequently promoting thin stable solid–electrolyte interphase (SEI) generation. Benefiting from optimized SEI generation, enables electrode reversible (de)intercalation (for over 1000 cycles) K plating/stripping (the K||Cu cell an average Coulombic efficiency 98.72% 400 dendrite-free properties K||K operates 1800 h). We demonstrate that rational design provides approach tailoring toward PIBs.

Язык: Английский

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Regulating ion transport behaviors toward dendrite-free potassium metal batteries: recent advances and perspectives

Rare Metals, Год журнала: 2024, Номер 43(4), С. 1435 - 1460

Опубликована: Янв. 20, 2024

Язык: Английский

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Recent advances in potassium metal batteries: electrodes, interfaces and electrolytes

Chemical Society Reviews, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

This review explores the latest advancements in potassium metal batteries, including electrode design, interface engineering, and electrolyte optimization to suppress dendrite formation enhance cycling stability.

Язык: Английский

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