Construction of MXene-Based Heterostructured Hybrid Separators for Lithium–Sulfur Batteries

Molecules, Journal Year: 2025, Volume and Issue: 30(8), P. 1833 - 1833

Published: April 19, 2025

The advancement of lithium-sulfur (Li-S) batteries has been hindered by the shuttle effect lithium polysulfides (LiPSs) and sluggish redox kinetics. engineering functional hybrid separators is a relatively simple effective coping strategy. Layered transition-metal carbides, nitrides, carbonitrides, class emerging two-dimensional materials termed MXenes, have gained popularity as catalytic for Li-S due to their metallic conductivity, tunable surface chemistry, terminal groups. Nonetheless, self-stacking flaws easy oxidation MXenes pose disadvantages, developing MXene-based heterostructures anticipated circumvent these issues yield other remarkable physicochemical characteristics. Herein, recent advances in construction heterostructured improving performance are reviewed. diverse conformational forms constitutive relationships with LiPS conversion discussed, general principles MXene chemistry alterations heterostructure designs enhancing electrochemical summarized. Lastly, tangible challenges addressed, advisable insights future research shared. This review aims highlight immense superiority battery separator modification inspire researchers.

Language: Английский

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Dry Synthesis of Sulfur‐Terminated MXene as Multifunctional Catalyst for Stable Lithium–Sulfur Batteries

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

Published: May 2, 2025

Abstract A multifunctional catalyst with enhanced polysulfide adsorption, rapid lithium diffusion, and exceptional catalytic activity is crucial for accelerating redox kinetics effectively suppressing the shuttle effect in lithium–sulfur (Li–S) batteries. However, developing an efficient synthesis method such catalysts remains challenging. Here, a sustainable, sulfur‐terminated MXene introduced via completely dry molten salt process, which avoids need harsh acid treatment, byproduct removal, extensive rinsing, typical syntheses. Theoretical calculations electrochemical data confirm that this serves as powerful catalyst, promoting effective superior performance, making it highly suitable advanced separators Li–S As result, cells incorporating demonstrate high capacity of 665 mAh g −1 after 500 cycles at 1 C, remarkably low‐capacity decay rate 0.05% per cycle. This study underscores potential precise surface termination control MXenes to drive further advancements battery technology.

Language: Английский

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Yttrium-Containing Solid Electrolyte Interphase Safeguards Lithium Anodes in Lithium–Sulfur Batteries

ACS Sustainable Chemistry & Engineering, Journal Year: 2024, Volume and Issue: 12(9), P. 3691 - 3701

Published: Feb. 16, 2024

Lithium–sulfur batteries (LSBs) are regarded as significantly potential future-oriented power sources. Nevertheless, one of the significant challenges that needs to be addressed in LSBs is lithium dendrite overgrowth. In this study, we have introduced 1% LiNO3 and 2% Y(NO3)3 (1% Li & Y) additives form an situ solid electrolyte interface (SEI) layer overcome overgrowth enhance electrochemical performance LSBs. Including (2% additive builds emergence composite passivation containing Y2S3/Li2S/Li2S2 covering anode. Y2S3 not only effectively enhances mechanical stability SEI on anode, but also catalyzes decomposition Li2S at cathode. addition, incorporation contributes improved coulomb efficiency LSB. The formulated with Y demonstrates a capacity 711.9 mA h g–1 after 250 cycles 0.5C, showcasing excellent cycle stability. Furthermore, decay rate for each 0.08%. These results validate effectiveness protecting anode effectively, thereby establishing developing environmentally friendly long-lasting batteries.

Language: Английский

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Layered CoMoS_3.13@NCNTs with a Rod-Shaped Skeleton as the Cathode of Lithium–Sulfur Batteries

ACS Sustainable Chemistry & Engineering, Journal Year: 2024, Volume and Issue: 12(26), P. 9864 - 9873

Published: June 21, 2024

Lithium metal has considerable advantages as an anode for lithium–sulfur batteries (LSBs). However, LSBs are susceptible to the slow oxidation kinetics of intermediate product polysulfides (LIPSs) and tendency lithium anodes form dendrites during charging discharging. Herein, we constructed a porous rod-like skeleton with metal–organic framework (MOF) main template construct LSB cathodes. ZIF-67 was loaded onto MoO3 nanorods vulcanized CoMoS3.13 rod skeleton. Melamine applied auxiliary carbon source generate highly conductive nanotubes, yielding final hierarchical composites CoMoS3.13@NCNTs. The unique layered hollow structure composite CoMoS3.13@NCNTs, which resulted from excellent exchange synergistic effect bimetallic ions, exerts good physical constraints accelerates transfer transformation LIPSs. On basis above advantages, CoMoS3.13@NCNTs showed electrochemical performance when tested cathode material LSBs, possessing initial discharge specific capacity 1372 mAh g–1 at 0.1 C maintaining low decay rate 0.039% after 1000 cycles 0.5 C. were also found have maintained attenuation They had 643 120 0.2 under high sulfur loading 4.0 mg cm–2. This work provides feasible concept preparation host materials high-performance LSBs.

Language: Английский

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Beyond graphene: exploring the potential of MXene anodes for enhanced lithium–sulfur battery performance

RSC Advances, Journal Year: 2024, Volume and Issue: 14(28), P. 20032 - 20047

Published: Jan. 1, 2024

The high theoretical energy density of Li–S batteries makes them a viable option for storage systems in the near future.

Language: Английский

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