Understanding the Catalytic Kinetics of Polysulfide Redox Reactions on Transition Metal Compounds in Li–S Batteries

ACS Nano, Год журнала: 2022, Номер 16(10), С. 15734 - 15759

Опубликована: Окт. 12, 2022

Because of their high energy density, low cost, and environmental friendliness, lithium–sulfur (Li–S) batteries are one the potential candidates for next-generation energy-storage devices. However, they have been troubled by sluggish reaction kinetics insoluble Li2S product capacity degradation because severe shuttle effect polysulfides. These problems overcome introducing transition metal compounds (TMCs) as catalysts into interlayer modified separator or sulfur host. This review first introduces mechanism redox reactions. The methods studying TMC in Li–S provided. Then, recent advances TMCs (such oxides, sulfides, selenides, nitrides, phosphides, carbides, borides, heterostructures) some helpful design modulation strategies highlighted summarized. At last, future opportunities toward presented.

Язык: Английский

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A CrMnFeCoNi high entropy alloy boosting oxygen evolution/reduction reactions and zinc-air battery performance

Energy storage materials, Год журнала: 2023, Номер 58, С. 287 - 298

Опубликована: Март 21, 2023

Язык: Английский

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Interface engineering toward stable lithium–sulfur batteries

Energy & Environmental Science, Год журнала: 2024, Номер 17(4), С. 1330 - 1367

Опубликована: Янв. 1, 2024

The interfaces, interfacial issues, and their impact on lithium–sulfur electrochemistry are overviewed for both coin cells practical batteries.

Язык: Английский

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Rechargeable Metal-Sulfur Batteries: Key Materials to Mechanisms

Chemical Reviews, Год журнала: 2024, Номер 124(8), С. 4935 - 5118

Опубликована: Апрель 10, 2024

Rechargeable metal-sulfur batteries are considered promising candidates for energy storage due to their high density along with natural abundance and low cost of raw materials. However, they could not yet be practically implemented several key challenges: (i) poor conductivity sulfur the discharge product metal sulfide, causing sluggish redox kinetics, (ii) polysulfide shuttling, (iii) parasitic side reactions between electrolyte anode. To overcome these obstacles, numerous strategies have been explored, including modifications cathode, anode, electrolyte, binder. In this review, fundamental principles challenges first discussed. Second, latest research on is presented discussed, covering material design, synthesis methods, electrochemical performances. Third, emerging advanced characterization techniques that reveal working mechanisms highlighted. Finally, possible future directions practical applications This comprehensive review aims provide experimental theoretical guidance designing understanding intricacies batteries; thus, it can illuminate pathways progressing high-energy-density battery systems.

Язык: Английский

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Dual-Functional Lithiophilic/Sulfiphilic Binary-Metal Selenide Quantum Dots Toward High-Performance Li–S Full Batteries

Nano-Micro Letters, Год журнала: 2023, Номер 15(1)

Опубликована: Март 15, 2023

Abstract The commercial viability of lithium–sulfur batteries is still challenged by the notorious lithium polysulfides (LiPSs) shuttle effect on sulfur cathode and uncontrollable Li dendrites growth anode. Herein, a bi-service host with Co-Fe binary-metal selenide quantum dots embedded in three-dimensional inverse opal structured nitrogen-doped carbon skeleton (3DIO FCSe-QDs@NC) elaborately designed for both metal highly dispersed FCSe-QDs superb adsorptive-catalytic properties can effectively immobilize soluble LiPSs improve diffusion-conversion kinetics to mitigate polysulfide-shutting behaviors. Simultaneously, 3D-ordered porous networks integrated abundant lithophilic sites accomplish uniform deposition homogeneous Li-ion flux suppressing dendrites. Taking advantage these merits, assembled Li–S full 3DIO FCSe-QDs@NC exhibit excellent rate performance stable cycling ability (a low decay 0.014% over 2,000 cycles at 2C). Remarkably, promising areal capacity 8.41 mAh cm −2 be achieved loading up 8.50 mg an ultra-low electrolyte/sulfur ratio 4.1 μL −1 . This work paves bi-serve design from systematic experimental theoretical analysis, which provides viable avenue solve challenges electrodes practical batteries.

Язык: Английский

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Self-supported NiO/CuO electrodes to boost urea oxidation in direct urea fuel cells

Nano Energy, Год журнала: 2023, Номер 115, С. 108714 - 108714

Опубликована: Июль 14, 2023

Язык: Английский

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Combined Defect and Heterojunction Engineering in ZnTe/CoTe₂@NC Sulfur Hosts Toward Robust Lithium–Sulfur Batteries

Advanced Functional Materials, Год журнала: 2023, Номер 33(46)

Опубликована: Июль 7, 2023

Abstract Lithium–sulfur batteries (LSBs) are feasible candidates for the next generation of energy storage devices, but shuttle effect lithium polysulfides (LiPSs) and poor electrical conductivity sulfur sulfides limit their application. Herein, a host based on nitrogen‐doped carbon (NC) coated with small amount transition metal telluride (TMT) catalyst is proposed to overcome these limitations. The properties redox tuned by adjusting anion vacancy concentration engineering ZnTe/CoTe 2 heterostructures. Theoretical calculations experimental data demonstrate that tellurium vacancies enhance adsorption LiPSs, while formed TMT/TMT TMT/C heterostructures as well overall architecture composite simultaneously provide high Li + diffusion fast electron transport. As result, v‐ZnTe/CoTe @NC/S cathodes show excellent initial capacities up 1608 mA h g −1 at 0.1C stable cycling an average capacity decay rate 0.022% per cycle 1C during 500 cycles. Even loading 5.4 mg cm –2 , 1273 retained, when reducing electrolyte 7.5 µL still maintains 890.8 after 100 cycles 0.1C.

Язык: Английский

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Development of Synergistically Efficient Ni–Co Pair Catalytic Sites for Enhanced Polysulfide Conversion in Lithium–Sulfur Batteries

Advanced Functional Materials, Год журнала: 2024, Номер 34(37)

Опубликована: Март 29, 2024

Abstract The performance of Lithium–sulfur (Li–S) batteries is constrained by the migration lithium polysulfide (LiPS), slow conversion LiPS, and significant reaction barrier encountered during precipitation/dissolution Li 2 S throughout discharge/charge cycle. In this contribution, study presents Ni–Co dual‐atom catalytic sites on hollow nitrogen‐doped carbon (NiCoNC). Theoretical calculations experimental data reveal that catalysts (DACs) accelerate kinetic LiPSs facilitate formation/decomposition discharging charging, which minimizes LiPS migration. Consequently, utilization S/NiCoNC cathodes manifests a substantial initial capacity 1348.5 mAh g −1 at 0.1 C, exceptional cycling stability with an average degradation rate 0.028% per cycle over 900 cycles 0.5 noteworthy capability 626 C. Electrodes higher sulfur loading 4.5 mg cm −2 low electrolyte/sulfur ratio 8 µL exhibit specific capacities up to 1236 as well retention 494.2 after 200 0.2 This effectively showcases potential DACs for cathodes, thereby enhancing overall Li–S batteries.

Язык: Английский

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Electronic Spin Alignment within Homologous NiS₂/NiSe₂ Heterostructures to Promote Sulfur Redox Kinetics in Lithium‐Sulfur Batteries

Advanced Materials, Год журнала: 2024, Номер 36(25)

Опубликована: Апрель 3, 2024

Abstract The catalytic activation of the Li‐S reaction is fundamental to maximize capacity and stability batteries (LSBs). Current research on catalysts mainly focuses optimizing energy levels promote adsorption conversion, while frequently overlooking electronic spin state influence charge transfer orbital interactions. Here, hollow NiS 2 /NiSe heterostructures encapsulated in a nitrogen‐doped carbon matrix (NiS @NC) are synthesized used as additive sulfur cathodes. heterostructure promotes splitting 3d orbital, driving Ni 3+ transformation from low high spin. This configuration raises level activates state. accelerates optimizes energy, lowering barrier polysulfides conversion. Benefiting these characteristics, LSBs based @NC/S cathodes exhibit initial (1458 mAh·g⁻ 1 at 0.1C), excellent rate capability (572 5C), stable cycling with an average decay only 0.025% per cycle 1C during 500 cycles. Even loadings (6.2 mg·cm⁻ ), capacities 1173 (7.27 mAh·cm⁻ ) measured 0.1C, 1058 retained after 300

Язык: Английский

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Tuning the Local Coordination of CoP_1–xS_x between NiAs- and MnP-Type Structures to Catalyze Lithium–Sulfur Batteries

ACS Nano, Год журнала: 2023, Номер 17(3), С. 3143 - 3152

Опубликована: Янв. 30, 2023

The slow conversion and rapid shuttling of polysulfides remain major challenges that hinder the practical application lithium-sulfur (Li-S) batteries. Efficient catalysts are needed to accelerate suppress shuttling. However, lack a rational understanding catalysis poses obstacles design catalysts, thereby limiting development Li-S Herein, we theoretically analyze modulation electronic structure CoP1-xSx caused by NiAs-to-MnP-type transition its influence on catalytic activity. We found interacting d-orbitals active metal sites play determining role in adsorption catalysis, optimal dz2-, dxz-, dyz-orbitals an appropriately distorted five-coordinate pyramid enable higher activity compared with their parent structures. Finally, rationally designed S were electrospun into carbonized nanofibers form nanoreactor chains for use as cathodes. resultant batteries exhibited superior properties over 1000 cycles only decay rate 0.031% per cycle demonstrated high capacity 887.4 mAh g-1 at loading 10 mg cm-2. structural bonding analyses this study provide powerful approach catalysts.

Язык: Английский

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