Long-Lasting Zinc–Iodine Batteries with Ultrahigh Areal Capacity and Boosted Rate Capability Enabled by Nickel Single-Atom Electrocatalysts

Nano Letters, Journal Year: 2023, Volume and Issue: 23(11), P. 5272 - 5280

Published: June 1, 2023

Zinc-iodine (Zn-I2) batteries have garnered significant attention for their high energy density, low cost, and inherent safety. However, several challenges, including polyiodide dissolution shuttling, sluggish iodine redox kinetics, electrical conductivity, limit practical applications. Herein, we designed a highly efficient electrocatalyst Zn-I2 by uniformly dispersing Ni single atoms (NiSAs) on hierarchical porous carbon skeletons (NiSAs-HPC). In situ Raman analysis revealed that the conversion of soluble polyiodides (I3- I5-) was significantly accelerated using NiSAs-HPC because remarkable electrocatalytic activity NiSAs. The resulting with NiSAs-HPC/I2 cathodes delivered exceptional rate capability (121 mAh g-1 at 50 C), ultralong cyclic stability (over 40 000 cycles C). Even under 11.6 mg cm-2 iodine, still exhibited an impressive capacity retention 93.4% 141 after 10 C.

Language: Английский

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Rechargeable Metal-Sulfur Batteries: Key Materials to Mechanisms

Chemical Reviews, Journal Year: 2024, Volume and Issue: 124(8), P. 4935 - 5118

Published: April 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.

Language: Английский

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Wide-Temperature Operation of Lithium–Sulfur Batteries Enabled by Multi-Branched Vanadium Nitride Electrocatalyst

ACS Nano, Journal Year: 2023, Volume and Issue: 17(12), P. 11527 - 11536

Published: June 8, 2023

High-performance lithium-sulfur (Li-S) batteries that can work normally under harsh conditions have attracted tremendous attention; however, the sluggish reaction kinetics of polysulfide conversions at low temperatures as well notorious shuttling high remain to be resolved. Herein, a multibranched vanadium nitride (MB-VN) electrocatalyst has been designed and deployed for Li-S batteries. Both experimental (time-of-flight secondary ion mass spectroscopy adsorption tests) theoretical results verify strong chemical capability electrocatalytic activity MB-VN with respect polysulfides. Moreover, in situ Raman characterization manifests effective inhibition by electrocatalyst. Using MB-VN-modified separators, deliver an excellent rate (707 mAh g-1 3.0 C) great cyclic stability (678 after 400 cycles 1.0 room temperature. With 6.0 mg cm-2 sulfur lean electrolyte volume ∼6 μL mgs-1, exhibit areal capacity 5.47 cm-2. Even over wide temperature range (-20 +60 °C), still maintain stable performance current rates. This demonstrates metal based electrocatalysts realize low-/high-temperature-tolerant

Language: Английский

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In Situ Reconstruction of Electrocatalysts for Lithium–Sulfur Batteries: Progress and Prospects

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(33)

Published: May 1, 2023

Abstract The current research of Li–S batteries primarily focuses on increasing the catalytic activity electrocatalysts to inhibit polysulfide shuttling and enhance redox kinetics. However, stability is largely neglected, given premise that they are stable over extended cycles. Notably, reconstruction during electrochemical reaction process has recently been proposed. Such in situ inevitably leads varied electrocatalytic behaviors, such as sites, selectivity, activity, amounts sites. Therefore, a crucial prerequisite for design highly effective an in‐depth understanding variation active sites influence factors which not achieved fundamental summary. This review comprehensively summarizes recent advances behaviors different process, mainly including metal nitrides, oxides, selenides, fluorides, metals/alloys, sulfides. Moreover, unexplored issues major challenges chemistry summarized prospected. Based this review, new perspectives offered into true batteries.

Language: Английский

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Boosting Charge Transport and Catalytic Performance in MoS₂ by Zn²⁺ Intercalation Engineering for Lithium–Sulfur Batteries

ACS Nano, Journal Year: 2024, Volume and Issue: 18(3), P. 2017 - 2029

Published: Jan. 9, 2024

Transition metal dichalcogenides (TMDs) have been widely studied as catalysts for lithium–sulfur batteries due to their good catalytic properties. However, poor electronic conductivity leads slow sulfur reduction reactions. Herein, a simple Zn2+ intercalation strategy was proposed promote the phase transition from semiconducting 2H-phase metallic 1T-phase of MoS2. Furthermore, between layers can expand interlayer spacing MoS2 and serve charge transfer bridge longitudinal transport along c-axis electrons. DFT calculations further prove that Zn-MoS2 possesses better ability stronger adsorption capacity. At same time, exhibits excellent redox electrocatalytic performance conversion decomposition polysulfides. As expected, battery using Zn0.12MoS2-carbon nanofibers (CNFs) cathode has high specific capacity (1325 mAh g–1 at 0.1 C), rate (698 3 outstanding cycle (it remains 604 after 700 cycles with decay 0.045% per cycle). This study provides valuable insights improving batteries.

Language: Английский

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Predicting the Remaining Useful Life of Supercapacitors under Different Operating Conditions

Energies, Journal Year: 2024, Volume and Issue: 17(11), P. 2585 - 2585

Published: May 27, 2024

With the rapid development of new energy industry, supercapacitors have become key devices in field storage. To forecast remaining useful life (RUL) supercapacitors, we introduce a technology that integrates variational mode decomposition (VMD) with bidirectional long short-term memory (BiLSTM) neural network. Firstly, aging experiments under various temperatures and voltages were carried out to obtain data. Then, VMD was implemented decompose data, which helped eliminate disturbances, including capacity recovery test errors. hyperparameters BiLSTM adjusted, employing sparrow search algorithm (SSA) improve consistency between input data network structure. After obtaining optimal BiLSTM, decomposed into for prediction. The experimental results showed VMD-SSA-BiLSTM model proposed this paper has high prediction accuracy robustness different voltages, an average RMSE 0.112519, decrease 44.3% compared minimum 0.031426.

Language: Английский

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Engineering Defect‐Rich Bimetallic Telluride with Dense Heterointerfaces for High‐Performance Lithium–Sulfur Batteries

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(26)

Published: Feb. 23, 2024

Abstract Rechargeable lithium–sulfur (Li–S) batteries have received ever‐increasing attention owing to their ultrahigh theoretical energy density, low cost, and environmental friendliness. However, practical application is critically plagued by the sluggish reaction kinetics, shuttling of soluble polysulfide intermediates, uncontrollable growth Li dendrites. Herein, a bimetallic telluride electrocatalyst with dense heterointerfaces rich defects embedded in hollow carbon polyhedron bunches (N⊂CoTe 1 ‐x /ZnTe ‐y @NC, abbreviated as NCZTC) rationally designed simultaneously address S cathode anode problems. Both experimental computational results substitute integration can synergistically modulate electronic structure, enhance electrical conductivity, promote + transportation, strengthen polysulfides adsorption improve catalytic activity, thereby significantly accelerating redox conversion kinetics prevent dendrite growth. Consequently, Li–S NCZTC‐modified separators demonstrate excellent electrochemical performance including high specific discharge capacity, remarkable rate capability, good long‐term cycling stability, competitive areal capacity even at sulfur loading lean electrolyte conditions. This study not only provides valuable guidance for designing efficient electrocatalysts transition metal tellurides but also emphasizes importance heterostructure design defect engineering high‐performance batteries.

Language: Английский

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Accelerated Sulfur Redox Kinetics on Transition Metal Sulfide Electrocatalysts by Modulating Electronic‐State of Active Sites

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(25)

Published: April 5, 2024

Abstract Lithium‐sulfur (Li‐S) batteries are considered a competitive next‐generation electrochemical energy storage device, while the shuttle effect of soluble lithium polysulfides (LiPSs) resulting from sluggish redox kinetics severely impedes their practical applications. Herein, novel cation doping strategy is demonstrated for substantially accelerating sulfur on transition metal sulfide (TMS) electrocatalysts by partially substituting cobalt atoms with in situ dissolved Ni dopants (Ni x Co 3‐x S 4 , 0<x≤1). Theoretical calculations revealed that spinel 3 phase enables electronic‐state modulation active sites realizing upshift d‐orbital center, thus leading to good chemical adsorption intermediates and low conversion barriers between LiPSs solid Li 2 products. This confirmed in‐depth dynamics Raman characterizations, which obtained 0.5 2.5 hierarchical nanosheet structure delivers stronger affinity 6 higher precipitation/dissociation capacity comparison monometallic sulfides. Benefiting these outstanding attributes, assembled Li‐S incorporating into S@carbon nanotube cathode (S@Ni /CNT) exhibit high specific 1189 mAh g −1 excellent rate performance 596 at 5 C long‐term cycling over 600 cycles decay 0.06% per cycle 1 C. More importantly, an ultrahigh reversible areal 6.6 cm −2 can be achieved S@Ni /CNT even loading 6.1 mg . work demonstrates new insight designing TMS toward rapid batteries.

Language: Английский

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Complementary Weaknesses: A Win‐Win Approach for rGO/CdS to Improve the Energy Conversion Performance of Integrated Photorechargeable Li−S Batteries

Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(22)

Published: March 15, 2024

Integrating solar energy into rechargeable battery systems represents a significant advancement towards sustainable storage solutions. Herein, we propose win-win solution to reduce the shuttle effect of polysulfide and improve photocorrosion stability CdS, thereby enhancing conversion efficiency rGO/CdS-based photorechargeable integrated lithium-sulfur batteries (PRLSBs). Experimental results show that CdS can effectively anchor under sunlight irradiation for 20 minutes. Under high current density (1 C), discharge-specific capacity PRLSBs increased 971.30 mAh g

Language: Английский

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Regulating the interfacial electric field of NbP–NbC heterostructures to efficiently inhibit polysulfide shuttling in Li–S batteries

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(9), P. 5307 - 5318

Published: Jan. 1, 2024

A novel NbP–NbC heterostructure with interfacial electric field provides moderate polysulfide absorbability and further enhances the intrinsic catalytic activity for Li–S batteries.

Language: Английский

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