Defect engineering of two-dimensional materials for advanced energy conversion and storage

Chemical Society Reviews, Journal Year: 2023, Volume and Issue: 52(5), P. 1723 - 1772

Published: Jan. 1, 2023

Defective two-dimensional (2D) materials show huge potential for energy-related fields. This review overviews the formation/evolution mechanisms and engineering strategies of defects in 2D materials, which enable enhanced electrode reaction kinetics.

Language: Английский

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Health prognostics for lithium-ion batteries: mechanisms, methods, and prospects

Energy & Environmental Science, Journal Year: 2023, Volume and Issue: 16(2), P. 338 - 371

Published: Jan. 1, 2023

Critical review of main aging mechanisms and health prognostic methods for lithium-ion batteries. Comprehensive summary challenges prospects future trends with potential solutions.

Language: Английский

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Tailoring water structure with high-tetrahedral-entropy for antifreezing electrolytes and energy storage at −80 °C

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: Feb. 3, 2023

One of unsolved puzzles about water lies in how ion-water interplay affects its freezing point. Here, we report the direct link between tetrahedral entropy and behavior Zn2+-based electrolytes by analyzing experimental spectra molecular simulation results. A higher leads to lower point, temperature is directly related value. By tailoring using different anions, develop an ultralow aqueous polyaniline| |Zn battery that exhibits a high capacity (74.17 mAh g-1) at 1 g-1 -80 °C with ~85% retention after 1200 cycles due electrolyte ionic conductivity (1.12 mS cm-1). Moreover, improved cycling life achieved ~100% 5000 -70 °C. The fabricated delivers appreciably enhanced performance terms frost resistance stability. This work serves provide guidance for design batteries precisely tuning structure within electrolytes.

Language: Английский

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Ion Transport Kinetics in Low‐Temperature Lithium Metal Batteries

Advanced Energy Materials, Journal Year: 2022, Volume and Issue: 12(42)

Published: Sept. 6, 2022

Abstract The deployment of rechargeable batteries is crucial for the operation advanced portable electronics and electric vehicles under harsh environment. However, commercial lithium‐ion using ethylene carbonate electrolytes suffer from severe loss in cell energy density at extremely low temperature. Lithium metal (LMBs), which use Li as anode rather than graphite, are expected to push baseline low‐temperature devices level. Albeit promising, kinetic limitations standard chemistries subzero condition inevitably hamper cyclability LMBs, resulting a decline plating/stripping reversibility short‐circuit hazards due dendritic growth. Such performance degradation becomes more pronounced with decreasing temperature, ascribing sluggish ion transport kinetics during charging/discharging processes includes + solvation/desolvation, through bulk electrolyte, well diffusion within solid electrolyte interphase electrode materials In this review, critical limiting factors challenges behaviors systematically reviewed discussed. strategies enhance electrolytes, electrodes, electrolyte/electrode interface comprehensively summarized. Finally, perspective on future research direction LMBs toward practical applications proposed.

Language: Английский

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Electrocatalysts for Zinc–Air Batteries Featuring Single Molybdenum Atoms in a Nitrogen‐Doped Carbon Framework

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

Published: June 16, 2023

Bifunctional catalysts can facilitate two different electrochemical reactions with conflicting characteristics. Here, a highly reversible bifunctional electrocatalyst for rechargeable zinc-air batteries (ZABs) is reported featuring "core-shell structure" in which N-doped graphene sheets wrap around vanadium molybdenum oxynitride nanoparticles. Single Mo atoms are released from the particle core during synthesis and anchored to electronegative N-dopant species graphitic shell. The resultant single-atom excel as active oxygen evolution reaction (OER) sites pyrrolic-N reduction (ORR) pyridinic-N environments. ZABs such multicomponent deliver high power density (≈376.4 mW cm-2 ) long cycle life of over 630 h, outperforming noble-metal-based benchmarks. Flexible that tolerate wide range temperatures (-20 80 °C) under severe mechanical deformation also demonstrated.

Language: Английский

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Challenges and Opportunities to Mitigate the Catastrophic Thermal Runaway of High‐Energy Batteries

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(15)

Published: Feb. 24, 2023

Abstract Li‐ion batteries (LIBs) that promise both safety and high energy density are critical for a new‐energy future. However, recent studies on battery thermal runaway (TR) suggest the higher is compressed in battery, accidents with fires explosions can occur more catastrophic way. This “trade‐off” between poses challenging obstacles toward future applications of developing high‐energy chemistries. Herein, most appealing (HE)‐LIB chemistries carefully reviewed. The TR characters HE‐LIBs, material failure behaviors as well underneath reaction mechanisms, advanced mitigation technologies comprehensively summarized. Moreover, effectiveness different routes analyzed. Based analysis, main challenges HE further explained. Finally, opinions mechanism promising design to overcome this intrinsic presented.

Language: Английский

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A Review on Regulating Li⁺Solvation Structures in Carbonate Electrolytes for Lithium Metal Batteries

Advanced Materials, Journal Year: 2022, Volume and Issue: unknown, P. 2206009 - 2206009

Published: Aug. 31, 2022

Lithium metal batteries (LMBs) are considered promising candidates for next-generation battery systems due to their high energy density. However, commercialized carbonate electrolytes cannot be used in LMBs poor compatibility with lithium anodes. While increasing cut-off voltage is an effective way boost the density of LMBs, conventional ethylene carbonate-based undergo a number side reactions at voltages. It therefore critical upgrade electrolytes, performance which highly influenced by solvation structure ions (Li+). This review provides comprehensive overview strategies regulate Li+ better understanding science behind and behavior. Different systematically compared help select specific applications. The remaining scientific technical problems pointed out, directions future research on proposed.

Language: Английский

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Temperature-dependent interphase formation and Li+ transport in lithium metal batteries

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: July 25, 2023

High-performance Li-ion/metal batteries working at a low temperature (i.e., <-20 °C) are desired but hindered by the sluggish kinetics associated with Li+ transport and charge transfer. Herein, temperature-dependent behavior during Li plating is profiled various characterization techniques, suggesting that diffusion through solid electrolyte interface (SEI) layer key rate-determining step. Lowering not only slows down transport, also alters thermodynamic reaction of decomposition, resulting in different pathways forming an SEI consisting intermediate products rich organic species. Such metastable unsuitable for efficient transport. By tuning solvation structure lower lowest unoccupied molecular orbital (LUMO) energy level polar groups, such as fluorinated electrolytes like 1 mol L-1 lithium bis(fluorosulfonyl)imide (LiFSI) methyl trifluoroacetate (MTFA): fluoroethylene carbonate (FEC) (8:2, weight ratio), inorganic-rich more readily forms, which exhibits enhanced tolerance to change (thermodynamics) improved (kinetics). Our findings uncover kinetic bottleneck provide directions enhance kinetics/thermodynamics low-temperature performance constructing interphases.

Language: Английский

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Aqueous zinc-ion batteries at extreme temperature: Mechanisms, challenges, and strategies

Energy storage materials, Journal Year: 2022, Volume and Issue: 51, P. 683 - 718

Published: July 5, 2022

Language: Английский

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Regulating interfacial reaction through electrolyte chemistry enables gradient interphase for low-temperature zinc metal batteries

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: Sept. 6, 2023

In situ formation of a stable interphase layer on zinc surface is an effective solution to suppress dendrite growth. However, the fast transport bivalent Zn-ions within solid interlayer remains very challenging. Herein, we engineer SEI components and enable superior kinetics Zn metal batteries under harsh conditions through regulating sequence interfacial chemical reaction. With differences in reactivity trimethyl phosphate co-solvent trifluoromethanesulfonate anions Zn2+-solvation shell, Zn3(PO4)2 ZnF2 are successively generated form gradient ZnF2-Zn3(PO4)2 interphase. Mechanistic studies reveal outer facilitates Zn2+ desolvation inner serves as channels for transport, contributing long-term cycling at subzero temperatures. Impressively, enables high lifespan over 7000 hours symmetric cell capacity retention 86.1% after 12000 cycles Zn-KVOH full -50 °C.

Language: Английский

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