Valence Electronic Modulation Induced by Reinforcing Interfacial Coupling for Expediting Sulfur Redox in Li─S Batteries

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 16, 2025

Abstract The practical application of rechargeable Lithium−sulfur (Li−S) batteries has been suffering from the serious “shuttle effect” soluble lithium polysulfides (LiPSs) and slow electrochemical kinetics, development high‐efficiency electrocatalysts still remains a challenge. Herein, quasi‐plane heterostructures composed vertically aligned metallic 1T‐MoSe 2 nanosheets evenly distributed on topological insulator Bi Se 3 substrates (1T‐MoSe /Bi ) are designed through two‐step hot‐injection solvothermal method. In comparison with 2H‐MoSe , incomplete paired orbitals attached lamellar surface contribute to establishment stronger interfacial coupling give rise valence electron modulation between Mo 4 d 6 p orbits in heterostructures, thus conduce weak S‐S bonding energy reduce diffusion barrier LiPSs. Theoretical experimental evaluations further elucidate enhanced chemical affinity superior catalytic performance toward Remarkably, assembled Li−S modified separator exhibits long‐term cycling stability only 0.039% capacity decay per cycle at 1 C over 1000 cycles. This study emphasizes importance interface design combined phase engineering for industrial batteries.

Language: Английский

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Enhanced Transformation Kinetics of Polysulfides Enabled by Synergistic Catalysis of Functional Graphitic Carbon Nitride for High‐Performance Li‐S Batteries

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 29, 2024

Abstract The introduction of an electrocatalyst to accelerate the kinetics lithium polysulfides (LiPSs) reduction/oxidation is beneficial enhance capacity sulfur cathode and inhibit shuttling effect LiPSs. However, current electrocatalysts mainly focus on metal‐based active sites reduce reaction barriers, there remains a great challenge in developing light‐weighted metal‐free catalysts. In this work, 1D graphitic carbon nitride nanorods (g‐C 3 N 4 ‐NRs) with carboxyl (─COOH) acylamide (─CONH 2 ) functional groups are designed as for lithium‐sulfur batteries transport Li + conversion density theory (DFT) calculations prove that existence ─COOH group realizes adsorption LiPSs accelerates , while ─CONH energy barrier S 8 S. addition, situ UV–vis nucleation/dissociation experiments also verify g‐C ‐NRs achieve rapid transformation under synergistic action groups. Consequently, based ‐NRs‐PP separator at specific 700.3 mAh g −1 after 70 cycles 0.2 C, 0 °C. This work provides new strategy breaking through bottleneck catalysts high‐performance batteries.

Language: Английский

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Transforming Waste into Valuable Resources: Mo2C Nanoparticles Modified Waste Pinecone-Derived Carbon as an Effective Sulfur Host for Lithium–Sulfur Batteries

Materials, Journal Year: 2025, Volume and Issue: 18(5), P. 1141 - 1141

Published: March 4, 2025

In this paper, the natural waste pinecone as a carbon precursor for generation of satisfactory sulfur host materials in lithium-sulfur batteries was realized by introducing molybdenum carbide nanoparticles into derived structure. The conductive pinecone-derived doped with N, O reveals an expansive specific surface area, facilitating accommodation higher load. Moreover, integration Mo2C also significantly enhances its chemical affinity and catalytic capacity polysulfides (LiPSs) to alleviate shuttle effect accelerate redox conversion. As result, WPC-Mo2C/S electrode displays excellent electrochemical performance, including low decay rate 0.074% per cycle during 600 cycles at 1 C outstanding (631.2 mAh g-1 3 C). high loading 5.5 mg cm-2, shows area 5.1 cm-2 after 60 0.2 C.

Language: Английский

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Gd-MOF-Derived GdS/C for the Modification of Separators in Lithium–Sulfur Batteries

Langmuir, Journal Year: 2025, Volume and Issue: unknown

Published: March 6, 2025

Because of its excellent energy density and specific capacity, lithium-sulfur batteries (LSBs) are considered one the most promising storage devices. However, shuttle effect slow transformation polysulfides hinder their practical application. To address effect, we used a Gd-MOF precursor for high-temperature carbonization to obtain GdS@C composite as modification layer LSB separators. The strong affinity metal sulfide sulfur enhances chemical anchoring catalyzes transformation. By employing separator material, effectively suppressed improved electrochemical performance. Under load 3 mg cm-2, initial discharge capacity with GdS@C-modified was 888.9 mAh g-1 at 0.5 C; after 500 cycles, it remained 435.6 retention rate 49.0%. With an increased loading 5 first cycle 0.1 C reached 908.4 g-1; 100 still 743.9 impressive 81.9%. These results demonstrate that material significantly performance LSBs showcases broad application potential.

Language: Английский

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Investigating MA MX–NiSe2@C heterostructures to Boost reaction kinetics in Lithium-Sulfur batteries

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 161575 - 161575

Published: March 1, 2025

Language: Английский

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Lithium Borate Glass Ceramics and Multiwalled Carbon Nanotube Composites as Efficient Sulfur Hosts for Enhanced Lithium–Sulfur Batteries

ACS Applied Electronic Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 27, 2025

Lithium–sulfur (Li–S) batteries are one of the encouraging alternatives to conventional lithium-ion batteries. However, dissolution polysulfide and low conductivity cathode materials limitations. In this work, lithium borate (LBO) glass ceramics combined with a multiwalled carbon nanotube (CNT) elemental sulfur, denoted LBO–CNT/S, were synthesized using simple techniques. This outstanding performance can be attributed synergistic interaction LBO CNT, which enhanced its unique properties. As result, LBO–CNT/S delivered highest electrochemical as in 30 cycles at 0.04 C. Additionally, sulfur loading was evaluated for revealing reversible capacity about 700 mA h/g 0.75 mg/cm2, even 0.2 After 100 cycles, retention dramatically dropped, remaining 70.8%. Meanwhile, mass 0.42 remained 90.7%, reducing negligible fading. Therefore, strategies have been developed improve stability Li–S content, glass-ceramic applied electrode design energy storage applications.

Language: Английский

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MoO₂–Stabilized MoS₂ Heterojunction Catalyst for Enhanced Lithium–Sulfur Battery

Industrial & Engineering Chemistry Research, Journal Year: 2025, Volume and Issue: unknown

Published: April 23, 2025

Language: Английский

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Three-dimensional interconnected carbon nanoreactors with CoP nanocrystals to enhance performance in solar cells

CrystEngComm, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

The honeycomb structure of CoP@PC increases the specific surface area, and uniform CoP enhances electrical conductivity reaction kinetics. Its PCE 8.88% is much higher than that Pt which 7.82%.

Language: Английский

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Incorporation of Mo2C nanoparticles to pollen-derived 3D porous carbon as electrocatalyst for high performance lithium-sulfur batteries

Journal of Energy Storage, Journal Year: 2024, Volume and Issue: 102, P. 114218 - 114218

Published: Oct. 18, 2024

Language: Английский

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