Strategies toward High‐Loading Lithium–Sulfur Battery

Advanced Energy Materials, Journal Year: 2020, Volume and Issue: 10(17)

Published: March 20, 2020

Abstract Lithium–sulfur (Li–S) batteries, due to the high theoretical energy density, are regarded as one of most promising candidates for breaking limitations energy‐storage system based on Li‐ion batteries. Tremendous efforts have been made meet challenge high‐performance Li–S in which a sulfur loading above 5 mg cm −2 delivers an areal capacity higher than mAh without compromising specific and cycling stability practical applications. However, serious problems exposed during scaling up loading. In this review, mechanistic insights into structural configuration, catalytic conversion, interfacial engineering, corresponding strategies development high‐loading batteries highlighted discussed, aiming at bridging gap between fundamental research cell‐level designs. Stemming from current achievements, future directions targeting high‐energy‐density commercialization proposed.

Language: Английский

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Heterostructures of 2D Molybdenum Dichalcogenide on 2D Nitrogen‐Doped Carbon: Superior Potassium‐Ion Storage and Insight into Potassium Storage Mechanism

Advanced Materials, Journal Year: 2020, Volume and Issue: 32(22)

Published: April 22, 2020

Constructing 2D heterostructure materials by stacking different can combine the merits of individual building blocks while eliminating their shortcomings. Dichalcogenides are attractive anodes for potassium-ion batteries (KIBs) due to high theoretical capacity. However, practical application dichalcogenide is greatly hampered poor electrochemical performance sluggish kinetics K+ insertion and electrode structure collapse resulting from large insertion. Herein, heterostructures molybdenum on nitrogen-doped carbon (MoS2 , MoSe2 -on-NC) prepared boost potassium storage performance. The unique possess built-in heterointerfaces, facilitating diffusion. robust chemical bonds (CS, CSe, CMo bonds) enhance mechanical strength electrodes, thus suppressing volume expansion. N-doped nanosheets interconnected as a 3D offer fast diffusion path electrons. Benefitting these merits, both MoS2 -on-NC exhibit unprecedented cycle life. Moreover, reaction mechanism revealed during process potassiation depotassiation.

Language: Английский

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2D Metal–Organic Frameworks (MOFs) for High‐Performance BatCap Hybrid Devices

Small, Journal Year: 2020, Volume and Issue: 16(30)

Published: June 25, 2020

Two identical layered metal-organic frameworks (MOFs) (CoFRS and NiFRS) are constructed by using flexible 1,10-bis(1,2,4-triazol-1-yl)decane as pillars 1,4-benzenedicarboxylic acid rigid linkers. The single-crystal structure analysis indicates that the as-synthesized MOFs possess fluctuant 2D networks with large interlayer lattices. Serving active electrode elements in supercapacitors, both deliver excellent rate capabilities, high capacities, longstanding endurances. Moreover, new intermediates two electrodes before after long-lifespan cycling also examined, which cannot be identified metal hydroxides peer reports. After assembled into battery-supercapacitor (BatCap) hybrid devices, NiFRS//activated carbon (AC) device displays better electrochemical results terms of gravimetric capacitance performance than CoFRS//AC a higher energy-density value 28.7 Wh kg-1 compared to other references MOFs-based electrodes. Furthermore, possible factors support distinct performances discussed analyzed.

Language: Английский

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Landscaping Covalent Organic Framework Nanomorphologies

Journal of the American Chemical Society, Journal Year: 2022, Volume and Issue: 144(26), P. 11482 - 11498

Published: June 27, 2022

The practical utilization of covalent organic frameworks (COFs) with manipulation at the atomic and molecular scale often demands their assembly on nano-, meso-, macroscale precise control. Consequently, synthetic approaches that establish ability to control nucleation growth COF crystallites self-assembly desired nanomorphologies have drawn substantial attention from researchers. On basis dimensionality morphologies, we can categorize them into zero- (0-D), one- (1-D), two- (2-D), three-dimensional (3-D) nanomorphologies. In this perspective, summarize reported strategies enable nanomorphologies' size, shape, reveal impact dimensionalities in physicochemical properties applications. aim is a synergistic optimization morphological while keeping micro- or mesoporosity, crystallinity, chemical functionalities COFs perspective. A detailed knowledge along way should help us enrich performance variety applications like catalysis, separation, sensing, drug delivery, energy storage, etc. We discussed interlinking between via transmutation dimensionalities. Such could lead variation during transition. Finally, concept constructing superstructures through combination two more has been explored, it bring up opportunities for developing next-generation innovative materials multidisciplinary

Language: Английский

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Preparation, characterization and hydrogen storage studies of carbon nanotubes and their composites: A review

International Journal of Hydrogen Energy, Journal Year: 2020, Volume and Issue: 45(7), P. 4653 - 4672

Published: Jan. 2, 2020

Language: Английский

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Porous NiCo2S4/FeOOH nanowire arrays with rich sulfide/hydroxide interfaces enable high OER activity

Nano Energy, Journal Year: 2020, Volume and Issue: 78, P. 105230 - 105230

Published: Aug. 8, 2020

Language: Английский

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Dimensionality, Function and Performance of Carbon Materials in Energy Storage Devices

Advanced Energy Materials, Journal Year: 2021, Volume and Issue: 12(4)

Published: May 28, 2021

Abstract Carbon materials show their importance in electrochemical energy storage (EES) devices as key components of electrodes, such active materials, conductive additives and buffering frameworks. To meet the requirements vastly developing markets related to EES, especially for electric vehicles large scale storage, rational design functional carbon with basis a deep understanding structure‐property relationships is demanded, which dimensionality variations hybridizations play critical roles improving performances EES devices. This review focuses on manipulation including transition, matching integration, optimize reaction space, interface framework respectively. gives comprehensive how improves performance carbon‐based electrodes kinetics optimization, electron transfer acceleration, mechanical stabilization thermal dissipation upon charging/discharging. The report ends perspective future challenges facing dependence. progress highlighted here expected provide guidance precise targeted synthesis varied electrode towards safe high resulting optimized deployments.

Language: Английский

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Optimizing Redox Reactions in Aprotic Lithium–Sulfur Batteries

Advanced Energy Materials, Journal Year: 2020, Volume and Issue: 10(42)

Published: Sept. 28, 2020

Abstract The lithium–sulfur battery is regarded as one of the promising energy‐storage devices beyond lithium‐ion due to its overwhelming energy density. aprotic Li–S electrochemistry hampered by issues arising from complex solid–liquid–solid conversion process. Recently, tremendous efforts have been made optimize electrochemical reaction in batteries through rationally designing compositions and structures cathodes. However, a deep comprehensive understanding actual mechanisms their impact on performance still insufficient. vigorous development various analysis situ techniques establish bridge between microstructure components macroscopic performance, thus providing more scientific guidance for optimal design batteries. In this review, based insights into mechanism with aid characterization methods, advanced innovations optimizing are systematically summarized, including materials design, cathode configurations optimization, electrolyte engineering, aim gain cathodic redox processes achieve high‐performance current status possible future directions field accordingly outlined.

Language: Английский

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Effect of pore structure and doping species on charge storage mechanisms in porous carbon-based supercapacitors

Materials Chemistry Frontiers, Journal Year: 2020, Volume and Issue: 4(9), P. 2610 - 2634

Published: Jan. 1, 2020

Turning to improve performances under industrial requirements may be more meaningful for research itself.

Language: Английский

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Recent advances in interface engineering strategy for highly‐efficient electrocatalytic water splitting

InfoMat, Journal Year: 2022, Volume and Issue: 5(1)

Published: Oct. 13, 2022

Abstract The hydrogen energy generated by the electrocatalytic water splitting reaction has been established as a renewable and clean carrier with ultra‐high density, which can well make up for shortcomings of conventional sources, such geographical limitations, climatic dependence, wastage. Notably, introduction electrocatalysts enhance efficiency process to generate hydrogen. Particularly, heterostructure constructed coupling multiple components (or phases) have emerged most promising option due well‐known electronic synergistic effects. existing reviews on interface engineering electrocatalyst design mostly focus relationship between heterostructures specific reactions. However, comprehensive overview integration model building, directional synthesis, mechanism rarely reported. To this end, in review, development catalysts is systematically introduced from perspective classification, growth regulation performance based interfacial microenvironment (bonding, configuration, lattice strain, etc.), thereby offering useful insights construction models. Besides, combined current applications strategies, challenges future are discussed relevant solutions proposed. Overall, review serve theoretical reference mechanism, further promote production technologies low consumption high yield. image

Language: Английский

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