Rational design of carbon materials as anodes for potassium-ion batteries

Energy storage materials, Journal Year: 2020, Volume and Issue: 34, P. 483 - 507

Published: Oct. 19, 2020

Language: Английский

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Status of rechargeable potassium batteries

Nano Energy, Journal Year: 2021, Volume and Issue: 83, P. 105792 - 105792

Published: Jan. 19, 2021

Language: Английский

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A tailored electrolyte for safe and durable potassium ion batteries

Energy & Environmental Science, Journal Year: 2023, Volume and Issue: 16(1), P. 305 - 315

Published: Jan. 1, 2023

Electrolytes are critical for the safety and long-term cyclability of potassium ion batteries. Here, a low-concentration, non-flammable, weakly solvating electrolyte enables cycling stability K||graphite cell over 2 years.

Language: Английский

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Prospects of Electrode Materials and Electrolytes for Practical Potassium‐Based Batteries

Small Methods, Journal Year: 2021, Volume and Issue: 5(12)

Published: Nov. 10, 2021

Potassium-ion batteries (PIBs) have attracted tremendous attention because of their high energy density and low-cost. As such, much effort has focused on developing electrode materials electrolytes for PIBs at the material levels. This review begins with an overview high-performance electrolytes, then evaluates prospects challenges practical to penetrate market. The current status safe operation, density, power cyclability, sustainability is discussed future studies materials, electrode-electrolyte interfaces are identified. It anticipated that this will motivate research development fill existing gaps potassium-based full so they may be commercialized in near future.

Language: Английский

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Tissue-derived carbon microbelt paper: a high-initial-coulombic-efficiency and low-discharge-platform K⁺-storage anode for 4.5 V hybrid capacitors

Energy & Environmental Science, Journal Year: 2021, Volume and Issue: 15(1), P. 158 - 168

Published: Nov. 25, 2021

Sanitary tissue is utilized as the precursor to construct a hard carbon microbelt paper (HCMB), which can be employed high-initial-coulombic-efficiency and low-discharge-platform K + -storage anode for 4.5 V hybrid capacitors.

Language: Английский

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Recent advances in rational design for high-performance potassium-ion batteries

Chemical Society Reviews, Journal Year: 2024, Volume and Issue: 53(13), P. 7202 - 7298

Published: Jan. 1, 2024

The growing global energy demand necessitates the development of renewable solutions to mitigate greenhouse gas emissions and air pollution. To efficiently utilize yet intermittent sources such as solar wind power, there is a critical need for large-scale storage systems (EES) with high electrochemical performance. While lithium-ion batteries (LIBs) have been successfully used EES, surging price, coupled limited supply crucial metals like lithium cobalt, raised concerns about future sustainability. In this context, potassium-ion (PIBs) emerged promising alternatives commercial LIBs. Leveraging low cost potassium resources, abundant natural reserves, similar chemical properties potassium, PIBs exhibit excellent ion transport kinetics in electrolytes. This review starts from fundamental principles structural regulation PIBs, offering comprehensive overview their current research status. It covers cathode materials, anode electrolytes, binders, separators, combining insights full battery performance, degradation mechanisms,

Language: Английский

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Capacitive contribution matters in facilitating high power battery materials toward fast-charging alkali metal ion batteries

Materials Science and Engineering R Reports, Journal Year: 2023, Volume and Issue: 154, P. 100737 - 100737

Published: May 17, 2023

Language: Английский

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Hierarchical porous nitrogen, oxygen, and phosphorus ternary doped hollow biomass carbon spheres for high‐speed and long‐life potassium storage

Carbon Energy, Journal Year: 2021, Volume and Issue: 4(1), P. 45 - 59

Published: Dec. 9, 2021

Abstract Limited lithium resources have promoted the exploration of new battery technologies. Among them, potassium‐ion batteries are considered as promising alternatives. At present, commercial graphite and other carbon‐based materials shown good prospects anodes for batteries. However, volume expansion structural collapse caused by periodic K + insertion/extraction severely restricted further development application A hollow biomass carbon ball (NOP‐PB) ternarily doped with N, O, P was synthesized used negative electrode a battery. X‐ray photoelectron spectroscopy, Fourier‐transform infrared transmission electron microscopy confirmed that spheres were successfully P. Further analysis proved ternary doping expands interlayer distance surface introduces more defect sites. DFT calculations simultaneously adsorption energy structure is greatly improved. The solid hierarchical porous buffers potassium insertion process, maintains original after long cycle promotes transfer ions electrons. Therefore, NOP‐PB shows extremely enhanced electrochemical performance, including high specific capacity, excellent long‐term stability, rate stability.

Language: Английский

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Flexible MXene Framework as a Fast Electron/Potassium‐Ion Dual‐Function Conductor Boosting Stable Potassium Storage in Graphite Electrodes

Advanced Functional Materials, Journal Year: 2021, Volume and Issue: 31(32)

Published: June 1, 2021

Abstract Graphite anodes show great potential for potassium storage, however, their capacity fades quickly owing to substantial interlayer expansion/shrinkage (i.e., up 60%) induced structural degradation. Here, Ti 3 C 2 T x MXene nanosheets are used as a fast electron/potassium‐ion dual‐function conductor construct the framework of all‐integrated graphite nanoflake (GNF)/MXene (GNFM) electrodes. The continuous constructs 3D channel transfer and endows GNFM electrodes with high stability. Owing this unique framework, exhibit much enhanced storage performances than that conventional polymer‐bonded even at mass loadings. Moreover, also impressive cyclability in non‐flammable electrolytes further assemble novel potassium‐ion capacitors an excellent energy/power densities (113.1 Wh kg –1 12.2 kW ). New insights into phase transition mechanism verified by operando XRD. Density functional theory calculations demonstrate can promote electron diffusion heterointerface between GNF MXene. Therefore, results designed multifunctional frameworks provide new paradigm producing efficient anodes.

Language: Английский

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Phosphorus and Oxygen Dual‐Doped Porous Carbon Spheres with Enhanced Reaction Kinetics as Anode Materials for High‐Performance Potassium‐Ion Hybrid Capacitors

Advanced Functional Materials, Journal Year: 2021, Volume and Issue: 31(31)

Published: May 28, 2021

Abstract Hard carbons with low cost and high specific capacity hold great potential as anode materials for potassium‐based energy storage. However, their sluggish reaction kinetics inevitable volume expansion degrade electrochemical performance. Through rational nanostructure design a heteroatom doping strategy, herein, the synthesis of phosphorus/oxygen dual‐doped porous carbon spheres is reported, which possess expanded interlayer distances, abundant redox active sites, oxygen‐rich defects. The as‐developed battery‐type material shows discharge (401 mAh g −1 at 0.1 A ), outstanding rate capability, ultralong cycling stability (89.8% after 10 000 cycles). In situ Raman spectroscopy density functional theory calculations further confirm that formation PC PO/POH bonds not only improves structural stability, but also contributes to rapid surface‐controlled potassium adsorption process. As proof concept, potassium‐ion hybrid capacitor assembled by sphere an activated cathode. It superior performance, opens new avenue innovative storage technology.

Language: Английский

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