Potassium-ion batteries: outlook on present and future technologies

Energy & Environmental Science, Journal Year: 2021, Volume and Issue: 14(4), P. 2186 - 2243

Published: Jan. 1, 2021

The limited resources and uneven distribution of lithium stimulate strong motivation to develop new rechargeable potassium-ion batteries that use alternative charge carriers.

Language: Английский

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Hard Carbon Anodes for Next‐Generation Li‐Ion Batteries: Review and Perspective

Advanced Energy Materials, Journal Year: 2021, Volume and Issue: 11(38)

Published: Sept. 1, 2021

Abstract Carbonaceous materials have been accepted as a promising family of anode for lithium‐ion batteries (LIBs) owing to optimal overall performance. Among various emerging carbonaceous materials, hard carbons recently gained significant attention high‐energy LIBs. The most attractive features are the enriched microcrystalline structure, which not only benefits uptake more Li + ions but also facilitates intercalation and deintercalation. However, booming application is significantly slowed by low initial Coulombic efficiency, large irreversible capacity, voltage hysteresis. Many efforts devoted address these challenges toward practical applications. This paper focuses on an up‐to‐date overview carbons, with emphasis lithium storage fundamentals material classification well present potential solutions. future prospects perspectives enable in next‐generation highlighted.

Language: Английский

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Carboxyl‐Dominant Oxygen Rich Carbon for Improved Sodium Ion Storage: Synergistic Enhancement of Adsorption and Intercalation Mechanisms

Advanced Energy Materials, Journal Year: 2020, Volume and Issue: 11(1)

Published: Nov. 20, 2020

Abstract Oxygen‐containing groups in carbon materials have been shown to affect the anode performance of sodium ion batteries; however, precise identification correlation between specific oxygen specie and Na + storage behavior still remains challenging as various coexist framework. Herein, a postengineering method via mechanochemistry process is developed achieve accurate doping (20.12 at%) carboxyl The constructed delivers all‐round improvements properties terms large reversible capacity (382 mAg −1 at 30 mA g ), an excellent rate capability (153 2 A ) well good cycling stability (141 after 2000 cycles 1.5 ). Control experiments, kinetic analysis, density functional theory calculations, operando measurements collectively demonstrate that not only act active sites for capacitive adsorption through suitable electrostatic interactions, but also gradually expand d ‐spacing by inducing repulsive force layers with preadsorbed, hence facilitate diffusion‐controlled insertion process. This work provides new insight rational tunning oxygen‐containing boosting synergy intercalation processes.

Language: Английский

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A Three-Dimensional Carbon Framework Constructed by N/S Co-doped Graphene Nanosheets with Expanded Interlayer Spacing Facilitates Potassium Ion Storage

ACS Energy Letters, Journal Year: 2020, Volume and Issue: 5(5), P. 1653 - 1661

Published: April 22, 2020

Carbon nanomaterials show potential in achieving good potassium ion storage; however, the limited interlayer spacing existing carbon greatly impacts performance of batteries (PIBs). Herein, we report a class three-dimensional (3D) porous framework materials constructed by S/N co-doping graphene nanosheets (CFM-SNG) with an ultralarge (0.448 nm) and rich edge defect as high-performance PIBs anodes. The resulting 3D CFM-SNG material achieves enhanced reversible capacity (348.2 mAh/g at 50 mA/g), cycling (188.8 1000 mA/g after 2000 cycles), rate capability (204.3 high current density mA/g). Density functional theory calculations further demonstrate that formed defects not only favor expansion adsorption K+ to anode but also prevent variation volume during potassiation/depotassiation process.

Language: Английский

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Direct Pyrolysis of Supermolecules: An Ultrahigh Edge‐Nitrogen Doping Strategy of Carbon Anodes for Potassium‐Ion Batteries

Advanced Materials, Journal Year: 2020, Volume and Issue: 32(25)

Published: May 14, 2020

Most reported carbonaceous anodes of potassium-ion batteries (PIBs) have limited capacities. One approach to improve the performance carbon is edge-nitrogen doping, which effectively enhances K-ion adsorption energy. It remains challenging achieve high doping due difficulty in controlling nitrogen dopant configuration. Herein, a new synthesis strategy proposed prepare with ultrahigh for high-performance PIBs. Specifically, self-assembled supermolecule precursors derived from pyromellitic acid and melamine are directly pyrolyzed. During pyrolysis process, amidation imidization reactions between before carbonization enable successful acid-melamine supermolecule. The obtained 3D nitrogen-doped turbostratic (3D-NTC) possesses framework composed nanosheets, crystalline structure, an edge-nitrogen-doping level up 16.8 at% (73.7% total 22.8 doping). These features endow 3D-NTCs remarkable performances as PIB anodes. 3D-NTC anode displays capacity 473 mAh g-1 , robust rate capability, long cycle life 500 cycles retention 93.1%. This will boost development rechargeable alkali-metal-ion batteries.

Language: Английский

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Enhanced Kinetics Harvested in Heteroatom Dual‐Doped Graphitic Hollow Architectures toward High Rate Printable Potassium‐Ion Batteries

Advanced Energy Materials, Journal Year: 2020, Volume and Issue: 10(28)

Published: June 11, 2020

Abstract Carbonaceous materials have emerged as promising anode candidates for potassium‐ion batteries (PIBs) due to overwhelming advantages including cost‐effectiveness and wide availability of materials. However, further development in this realm is handicapped by the deficiency their in‐target large‐scale synthesis, well low specific capacity huge volume expansion. Herein precise scalable synthesis N/S dual‐doped graphitic hollow architectures (NSG) via direct plasma enhanced chemical vapor deposition reported. Thus‐fabricated NSG affording uniform nitrogen/sulfur co‐doping, possesses ample potassiophilic surface moieties, effective electron/ion‐transport pathways, high structural stability, which bestow it with rate capability (≈100 mAh g −1 at 20 A ) a prolonged cycle life (a retention 90.2% 5 after 5000 cycles), important steps toward high‐performance K‐ion storage. The kinetics are systematically probed theoretical simulations combined operando Raman spectroscopy, ex situ X‐ray photoelectron galvanostatic intermittent titration technique measurements. In contexts, printed electrodes tunable mass loading (1.84, 3.64, 5.65 mg cm −2 realized showcase areal capacities. This study demonstrates construction printable carbon‐based PIB anode, that holds great promise next‐generation grid‐scale applications.

Language: Английский

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Foldable potassium-ion batteries enabled by free-standing and flexible SnS₂@C nanofibers

Energy & Environmental Science, Journal Year: 2020, Volume and Issue: 14(1), P. 424 - 436

Published: Nov. 23, 2020

Foldable potassium-ion batteries are achieved through flexible and free-standing SnS₂@C nanofibers.

Language: Английский

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Lignin derived carbon materials: current status and future trends

Carbon Research, Journal Year: 2022, Volume and Issue: 1(1)

Published: July 29, 2022

Abstract Developing novel techniques to convert lignin into sustainable chemicals and functional materials is a critical route toward the high-value utilization of lignocellulosic biomass. Lignin-derived carbon hold great promise for applications in energy chemical engineering, catalysis environmental remediation. In this review, state-of-art sciences technologies controllable synthesis lignin-derived are summarized, pore structure crystalline morphology controlling methodologies thoroughly outlined critically discussed. Green engineering with cost-effectiveness precise carbonization tuning microstructure future research trends materials. Future directions that could be employed advance commercial then proposed.

Language: Английский

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Fast potassium migration in mesoporous carbon with ultrathin framework boosting superior rate performance for high-power potassium storage

Energy storage materials, Journal Year: 2021, Volume and Issue: 40, P. 490 - 498

Published: May 30, 2021

Language: Английский

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Carbonaceous Anode Materials for Non-aqueous Sodium- and Potassium-Ion Hybrid Capacitors

ACS Energy Letters, Journal Year: 2021, Volume and Issue: 6(11), P. 4127 - 4154

Published: Nov. 1, 2021

Sodium- and potassium-ion (Na-/K-ion) hybrid capacitors are promising electrochemical energy storage systems that more cost-effective than corresponding lithium-based alternatives. Their configuration integrates a battery-type anode capacitor-type cathode affords high density, power good cycling stability. However, the primary issue encountered in Na-/K-ion is lack of reliable anodes because sluggish reaction kinetics large Na-/K-ions. In recent years, significant advancements have been achieved carbonaceous their feasibility, natural abundance, low cost, non-toxicity. This review encompasses fundamental principles provides insights into intimate structure–performance relationship anodes. The existing challenges alternative strategies for improving performance emphasized. Finally, future prospects possible directions further presented.

Language: Английский

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