Research Development on K-Ion Batteries

Chemical Reviews, Journal Year: 2020, Volume and Issue: 120(14), P. 6358 - 6466

Published: Jan. 15, 2020

Li-ion batteries (LIBs), commercialized in 1991, have the highest energy density among practical secondary and are widely utilized electronics, electric vehicles, even stationary storage systems. Along with expansion of their demand application, concern about resources Li Co is growing. Therefore, composed earth-abundant elements desired to complement LIBs. In recent years, K-ion (KIBs) attracted significant attention as potential alternatives Previous studies developed positive negative electrode materials for KIBs demonstrated several unique advantages over LIBs Na-ion (NIBs). Thus, besides being free from any scarce/toxic elements, low standard potentials K/K+ electrodes lead high operation voltages competitive those observed Moreover, K+ ions exhibit faster ionic diffusion electrolytes due weaker interaction solvents anions than that Li+ ions; this essential realize high-power KIBs. This review comprehensively covers on electrochemical KIBs, including electrolyte a discussion achievements remaining/emerging issues. The also includes insights into reactions solid-state ionics nonaqueous solution chemistry well perspectives research-based development compared NIBs.

Language: Английский

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Graphite as anode materials: Fundamental mechanism, recent progress and advances

Energy storage materials, Journal Year: 2020, Volume and Issue: 36, P. 147 - 170

Published: Dec. 28, 2020

Language: Английский

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Emerging Era of Electrolyte Solvation Structure and Interfacial Model in Batteries

ACS Energy Letters, Journal Year: 2022, Volume and Issue: 7(1), P. 490 - 513

Published: Jan. 3, 2022

Over the past two decades, solid–electrolyte interphase (SEI) layer that forms on an electrode's surface has been believed to be pivotal for stabilizing performance in lithium-ion batteries (LIBs). However, more and researchers currently are realizing metal-ion solvation structure (e.g., Li+) electrolytes derived interfacial model (i.e., desolvation process) can affect significantly. Thus, herein we summarize recent research focused how discover importance of electrolyte's structure, develop a quantitative describe construct understand performance, apply these theories design electrolytes. We provide timely review scientific relationship between molecular interactions metal ions, anions, solvents which viewpoint differs from SEI interpretations before. These discoveries may herald new, post-SEI era due their significance guiding LIBs improvement, as well developing other beyond.

Language: Английский

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Pitch‐Derived Soft Carbon as Stable Anode Material for Potassium Ion Batteries

Advanced Materials, Journal Year: 2020, Volume and Issue: 32(17)

Published: March 12, 2020

Potassium ion batteries (KIBs) have emerged as a promising energy storage system, but the stability and high rate capability of their electrode materials, particularly carbon most investigated anode ones, become primary challenge. Here, it is identified that pitch-derived soft carbon, nongraphitic carbonaceous species which paid less attention in battery field, holds special advantage KIB anodes. The structural flexibility makes convenient to tune its crystallization degree, thereby modulating behavior large-sized K+ turbostratic lattices satisfy need resilience, low-voltage feature, transportation kinetics. It confirmed simple thermal control can produce structurally optimized has much better performance than widely reported counterparts such graphite hard carbon. findings highlight potential an interesting category suitable for high-performance provide insights understanding complicated mechanisms KIBs.

Language: Английский

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Electrolytes and Interphases in Potassium Ion Batteries

Advanced Materials, Journal Year: 2021, Volume and Issue: 33(7)

Published: Jan. 6, 2021

Potassium ion batteries (PIBs) are recognized as one promising candidate for future energy storage devices due to their merits of cost-effectiveness, high-voltage, and high-power operation. Many efforts have been devoted the development electrode materials progress has well summarized in recent review papers. However, addition materials, electrolytes also play a key role determining cell performance. Here, research PIBs is summarized, including organic liquid electrolytes, ionic solid-state aqueous engineering electrode/electrolyte interfaces thoroughly discussed. This Progress Report provides comprehensive guidance on design electrolyte systems high performance PIBs.

Language: Английский

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Graphene Oxide Wrapped CuV₂O₆ Nanobelts as High-Capacity and Long-Life Cathode Materials of Aqueous Zinc-Ion Batteries

ACS Nano, Journal Year: 2019, Volume and Issue: 13(10), P. 12081 - 12089

Published: Sept. 25, 2019

Rechargeable aqueous zinc-ion batteries are considered as a promising alternative of lithium-ion for stationary energy storage because their economical and high safety quality. However, widespread application is still impeded by the development cathode materials with poor density limited long-term stability. Herein, we report high-performance CuV2O6 material elucidate zinc-storage mechanism. The reversible phase transformation between ZnV2O6, accompanied zinc ion insertion/extraction reduction/oxidation metallic Cu nanoparticles, all contribute to excellent battery performance: an impressively specific capacity 427 mA h g-1 at current 0.1 A g-1, cycling stability minor loss (0.7%) after 3000 cycles 5 317 Wh kg-1 power 210 W kg-1. Furthermore, graphene oxide wrapped nanocomposites successfully fabricated, which demonstrates significantly enhanced (at least 30% improvement). This work provides intriguing expands available options transition metal vanadate batteries.

Language: Английский

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Challenges and Strategies toward Cathode Materials for Rechargeable Potassium‐Ion Batteries

Advanced Materials, Journal Year: 2021, Volume and Issue: 33(47)

Published: Jan. 14, 2021

Abstract With increasing demand for grid‐scale energy storage, potassium‐ion batteries (PIBs) have emerged as promising complements or alternatives to commercial lithium‐ion owing the low cost, natural abundance of potassium resources, standard reduction potential potassium, and fascinating K + transport kinetics in electrolyte. However, density unstable cycle life cathode materials hamper their practical application. Therefore, with high capacities, redox potentials, good structural stability are required advancement toward next‐generation PIBs. To this end, understanding structure‐dependent intercalation electrochemistry recognizing existing issues relating indispensable prerequisites. This review summarizes recent advances PIB materials, including metal hexacyanometalates, layered oxides, polyanionic frameworks, organic compounds, an emphasis on advantages reaction. Moreover, major current challenges corresponding strategies each category highlighted. Finally, future research directions perspectives presented accelerate development PIBs facilitate applications. It is believed that will provide guidance researchers engaged developing advanced materials.

Language: Английский

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Hierarchical porous carbon nanofibers for compatible anode and cathode of potassium-ion hybrid capacitor

Energy & Environmental Science, Journal Year: 2020, Volume and Issue: 13(8), P. 2431 - 2440

Published: Jan. 1, 2020

Hierarchical porous carbon nanofibers can efficiently eliminate kinetics and capacity mismatches between the anode cathode of potassium-ion hybrid capacitor.

Language: Английский

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Carbon Anode Materials: A Detailed Comparison between Na‐ion and K‐ion Batteries

Advanced Energy Materials, Journal Year: 2021, Volume and Issue: 11(11)

Published: Jan. 27, 2021

Abstract As novel “post lithium‐ion batteries,” sodium‐ion batteries/potassium‐ion batteries (SIBs/PIBs) are emerging and show bright prospect in large‐scale energy storage applications due to abundant Na/K resources. Further benefits of this technology include, its low cost, chemical inertness safety. Extensive research findings have demonstrated that carbon‐based materials promising candidates for both SIBs PIBs. Although the two alkali‐ion similar internal components electrochemical reaction mechanisms, storage/release behaviors Na + K not exactly same. Therefore, a comprehensive comparison /K carbon anode is lacking. It absolutely imperative understand these mechanisms more clearly achieve ideal performance. Herein, three potential discussed, which i) intercalation/deintercalation mechanism, ii) adsorption/desorption iii) pore‐filling mechanism. This review only attempts summarize development status (graphite, graphene, hard soft carbon), but also provides (mechanism, capacity, rate capability, diffusion coefficient, cyclability, potassiation/sodiation potential) between Finally, critical issues perspectives discussed demonstrate possible directions

Language: Английский

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An Intrinsically Non‐flammable Electrolyte for High‐Performance Potassium Batteries

Angewandte Chemie International Edition, Journal Year: 2019, Volume and Issue: 59(9), P. 3638 - 3644

Published: Dec. 16, 2019

Potassium-ion batteries are promising for low-cost and large-scale energy storage applications, but the major obstacle to their application is lack of safe effective electrolytes. A phosphate-based fire retardant such as triethyl phosphate now shown work a single solvent with potassium bis(fluorosulfonyl)imide at 0.9 m, in contrast previous Li Na systems where phosphates cannot low concentrations. This electrolyte optimized 2 it exhibits advantages cost, viscosity, high conductivity, well formation uniform robust salt-derived solid-electrolyte interphase layer, leading non-dendritic K-metal plating/stripping Coulombic efficiency 99.6 % highly reversible graphite anode.

Language: Английский

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