High Entropy Induced Local Charge Enhancement Promotes Frank–Van der Merwe Growth for Dendrite‐Free Potassium Metal Batteries DOI Open Access
Che‐Bin Chang, Yi‐Ju Tseng, Ying‐Rui Lu

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 13, 2024

Abstract Potassium metal batteries (PMBs) are promising for next‐generation energy storage. However, the high reactivity of anode causes instability in solid electrolyte interface (SEI), resulting Volmer‐Weber (V‐W) type deposition. To achieve uniform Frank‐van der Merwe (F‐M) deposition, entropy alloy nanoparticles designed (HEA NPs) with equimolar ratios Mn, Fe, Co, Cu, and Ni to enhance substrate‐K interface. HEA NPs K affinity N‐doped nanocarbon fiber substrate (N‐PCNF) maximize ion electron transport efficiency. The dendrite‐free horizontal growth confirmed through Operando X‐ray diffraction (XRD) optical microscopy (OM). Consequently, asymmetric cell exhibits ultra‐long cycling stability 2350 hours at a current density 8 mA cm −2 . full composed molten diffusion into decorated N‐PCNF perylene‐3,4,9,10‐tetracarboxylic dianhydride cathode (HEA‐N‐PCNF‐K||PTCDA) delivers an 331 W h kg −1 remains stable over 2000 cycles. This study offers pathway innovative PMBs designs broad application prospects.

Language: Английский

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

Yanhong Feng,

Apparao M. Rao,

Jiang Zhou

et al.

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(30)

Published: April 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.

Language: Английский

Citations

91
Co-activation for enhanced K-ion storage in battery anodes DOI Creative Commons

Yanhong Feng,

Yawei Lv, Hongwei Fu

et al.

National Science Review, Journal Year: 2023, Volume and Issue: 10(7)

Published: April 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

Language: Английский

Citations

82
Advanced anode materials for potassium batteries: Sorting out opportunities and challenges by potassium storage mechanisms DOI Creative Commons
Meng Ma, Shaokun Chong, Kai Yao

et al.

Matter, Journal Year: 2023, Volume and Issue: 6(10), P. 3220 - 3273

Published: Aug. 9, 2023

Language: Английский

Citations

57
Mixed-biomass engineering achieves multi-doped highly-disordered hierarchical flower-like hard carbon for advanced potassium-ion battery DOI
Xixue Zhang,

Ruling Huang,

Feng Wu

et al.

Nano Energy, Journal Year: 2023, Volume and Issue: 117, P. 108913 - 108913

Published: Sept. 16, 2023

Language: Английский

Citations

44
Building Stable Solid‐State Potassium Metal Batteries DOI
Lyu Wang, Xinzhi Yu, Yawei Lv

et al.

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(24)

Published: Jan. 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.

Language: Английский

Citations

36
Nonflammable Phosphate‐Based Electrolyte for Safe and Stable Potassium Batteries Enabled by Optimized Solvation Effect DOI

Dianwei Zhang,

Hongwei Fu,

Xuemei Ma

et al.

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(29)

Published: May 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.

Language: Английский

Citations

34
Sustainable Electrolytes: Design Principles and Recent Advances DOI

Xuemei Ma,

Dianwei Zhang,

Jie Wen

et al.

Chemistry - A European Journal, Journal Year: 2024, Volume and Issue: 30(36)

Published: April 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.

Language: Английский

Citations

20
Restructuring Electrolyte Solvation by a Partially and Weakly Solvating Cosolvent toward High-Performance Potassium-Ion Batteries DOI
Weijie Chen,

Dianwei Zhang,

Hongwei Fu

et al.

ACS Nano, Journal Year: 2024, Volume and Issue: 18(19), P. 12512 - 12523

Published: May 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.

Language: Английский

Citations

20
Recent advances in potassium metal batteries: electrodes, interfaces and electrolytes DOI Creative Commons
Jianlu Sun, Yichen Du, Yijiang Liu

et al.

Chemical Society Reviews, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 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.

Language: Английский

Citations

14
Optimized K+ Deposition Dynamics via Potassiphilic Porous Interconnected Mediators Coordinated by Single‐Atom Iron for Dendrite‐Free Potassium Metal Batteries DOI Creative Commons

Tsann Lin,

Yi‐Chun Yang,

Hsing‐Yu Tuan

et al.

Advanced Science, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 9, 2025

Abstract Potassium metal batteries are emerging as a promising high‐energy density storage solution, valued for their cost‐effectiveness and low electrochemical potential. However, understanding the role of potassiphilic sites in nucleation growth remains challenging. This study introduces single‐atom iron, coordinated by nitrogen atoms 3D hierarchical porous carbon fiber (Fe─N‐PCF), which enhances ion electron transport, improves diffusion kinetics, reduces energy barriers potassium deposition. Molten infusion experiments confirm Fe─N‐PCF's strong properties, accelerating adsorption kinetics improving deposition performance. According to Scharifker‐Hills model, traditional substrates without cause instantaneous nucleation, leading dendritic growth. In contrast, integration porosity promotes uniform progressive dense deposition, confirmed dimensionless i 2 /i max versus t/t plots real‐time situ optical microscopy. Consequently, X‐ray diffraction demonstrated stable cycling over 1900 h, while Fe─N‐PCF@K||PTCDA full cell retained 69.7% its capacity after 2000 cycles (72 mAh g −1 ), with voltage hysteresis 0.876 V, confirming potential high extended cycle life, paving way future advancements technology.

Language: Английский

Citations

2