Accelerating Sulfur Conversion Kinetics by Topological Semimetal Electrocatalysts Pd₃Sn for High‐performance Li‐S Batteries

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

Published: Feb. 21, 2025

Abstract The shuttle effect and sluggish reaction kinetics of soluble lithium polysulfides (LiPSs) significantly impede the practical application lithium‐sulfur (Li‐S) batteries. Topological semimetals (TSMs) offer a promising solution to these challenges due their unique topological surface states. This study synthesizes reduced graphene oxide (rGO)‐loaded Pd 3 Sn TSMs (Pd Sn@rGO) that are prepared by NaBH 4 reduction method. obtained Sn@rGO composite has notably stronger adsorption capability for LiPSs than pure rGO verified experiments density functional theory (DFT) calculations. states facilitate acceptance electrons from Li 2 S 6 during process, thereby enhancing accelerating redox reactions. Furthermore, deposition confirm effective catalytic role in nucleation process S. Consequently, Li‐S batteries with modified separators showcase exceptional rate performance across various current densities along impressive cycling stability (decay 0.0598% per cycle at 1C). work highlights catalyzing sulfur reactions underscores potential other TSM electrocatalysts

Language: Английский

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Phosphorus-Containing Polymer Electrolytes for Li Batteries

Batteries, Journal Year: 2024, Volume and Issue: 10(2), P. 56 - 56

Published: Feb. 4, 2024

Lithium-ion polymer batteries, also known as lithium-polymer, abbreviated Li-po, are one of the main research topics nowadays in field energy storage. This review focuses on use phosphorus containing compounds Li-po such polyphosphonates and polyphosphazenes. batteries mini-devices, capable providing power for any portable gadget. From a constructive point view, contain an anode (carbon), cathode (metal oxide), electrolyte, which could be liquid electrolytes or solid electrolytes. In general, divider is used to keep from touching each other directly. Since have generally high ionic conductivity, they frequently employed Li-ion batteries. last decade, this has focused solving safety issues, leakage risk ignition due volatile flammable organic solvents. The remain problems improving performance.

Language: Английский

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Stable Structure and Fast Ion Diffusion: A Flexible MoO2@Carbon Hollow Nanofiber Film as a Binder-Free Anode for Sodium-Ion Batteries with Superior Kinetics and Excellent Rate Capability

Polymers, Journal Year: 2024, Volume and Issue: 16(11), P. 1452 - 1452

Published: May 21, 2024

Designing innovative anode materials that exhibit excellent ion diffusion kinetics, enhanced structural stability, and superior electrical conductivity is imperative for advancing the rapid charge–discharge performance widespread application of sodium-ion batteries. Hollow-structured have received significant attention in electrode design due to their kinetics. Building upon this, we present a high-performance, free-standing MoO2@hollow carbon nanofiber (MoO2@HCNF) electrode, fabricated through facile coaxial electrospinning subsequent heat treatment. In comparison MoO2@carbon nanofibers (MoO2@CNFs), MoO2@HCNF demonstrates rate capability, attributed its larger specific surface area, higher pseudocapacitance contribution, kinetics sodium ions. The discharge capacities (MoO2@CNF) at current densities 0.1, 0.2, 0.5, 1.0, 2.0 5.0 A g−1 are 195.55 (155.49), 180.98 (135.20), 163.81 (109.71), 144.05 (90.46), 121.16 (71.21) 88.90 (44.68) mAh g−1, respectively. Additionally, coefficients ions MoO2@HCNFs 8.74 × 10−12 1.37 cm2 s−1, which surpass those MoO2@CNFs (6.49 9.30 10−13 s−1) during discharging process. addition, these prepared outstanding flexibility, crucial power storage industry smart wearable devices.

Language: Английский

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Electrical and Mechanical Characterisation of Poly(ethylene)oxide-Polysulfone Blend for Composite Structural Lithium Batteries

Polymers, Journal Year: 2023, Volume and Issue: 15(11), P. 2581 - 2581

Published: June 5, 2023

In this work, a blend of PEO, polysulfone (PSF), and lithium bis(trifluoromethanesulfonyl)imide (LiTFSi) was prepared at different PEO–PSf weight ratios (70-30, 80-20, 90-10) ethylene oxide to (EO/Li) (16/1, 20/1, 30/1, 50/1). The samples were characterised using FT-IR, DSC, XRD. Young’s modulus tensile strength evaluated room temperature with micro-tensile testing. ionic conductivity measured between 5 °C 45 through electrochemical impedance spectroscopy (EIS). ratio PEO PSf equal 70-30 EO/Li 16/1 have the highest (1.91 × 10−4 S/cm) 25 °C, while 80-20 = 50/1 averaged about 1.5 GPa °C. configuration good balance electrical mechanical properties is which has 1.17 S/cm 800 MPa, both It also found that increasing dramatically affects them showing extreme embrittlement.

Language: Английский

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Electrochemically Structured Copper Current Collectors for Application in Energy Conversion and Storage: A Review

Energies, Journal Year: 2023, Volume and Issue: 16(13), P. 4933 - 4933

Published: June 25, 2023

Copper current collectors (Cu CCs) impact the production technology and performance of many electrochemical devices by their unique properties reliable operation. The efficiency related processes operation could be significantly improved optimization Cu CCs. Metallic plays an important role in energy storage electrocatalysis, primarily as a conducting substrate on which chemical take place. Li nucleation growth can influenced collector modulating local density ion transport. For example, commonly used planar CC does not perform satisfactorily; therefore, high number different modifications CCs have been proposed reported literature for minimizing density, hindering dendrite formation, improving Coulombic efficiency. Here, we provide updated critical overview basic strategies 3D structuring, methodologies analyzing these structures, approaches effective control over most relevant properties. These methods are described context practical usefulness applicability effort to aid easy implementation research groups private companies with established traditions electrochemistry plating technology. Furthermore, helpful specialists experience associated fields knowledge such materials engineering surface finishing, where frequently applied. Motivated importance final application devices, this review additionally discusses relationship between functional parameters already-implemented electrodes.

Language: Английский

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