Conductive Carbon Fibrous Interlayer Embedded with MoS2@CNT Composites for Mitigating Polysulfide Shuttling by Absorption and Catalysis in Lithium–Sulfur Batteries DOI
Shuang Yuan, Ling Lin,

Huahui Chen

et al.

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

Published: March 21, 2025

Lithium–sulfur batteries (LSBs) have emerged as promising energy storage systems due to their high density, low cost, and environmental friendliness. However, the "shuttle effect" of lithium polysulfides (LiPSs) leads rapid capacity decay poor cycle stability in LSBs, hindering further development application LSBs. In addition, it is difficult for existing strategies provide effective adsorption catalytic properties while simultaneously ensuring ion transport. To address this issue, a composite film made carbon fibers embedded with MoS2@CNT proposed an interlayer between separator cathode. Results show that such conductive can effectively capture LiPSs catalyze transformation. The as-assembled LSBs deliver initial discharge-specific 1179.03 mAh/g at 0.5 C, 1086.33 remains after 100 cycles. During long-term cycling tests, discharge capacities 463.13 rate per 0.07% 500 cycles 3 representing reduction 0.06% compared commercial (0.13%). This work demonstrates potential independent design fibrous films composites enhancing battery performance. not only efficient network accelerating transport but also suppress shuttle effect transformation LiPSs, boosting electrochemical reaction kinetics.

Language: Английский

Alkylamine-tuned MoOx with synergistic manipulation of interlayer spacing and oxygen vacancies toward advanced Li–S batteries DOI

Fengjun Niu,

Guobao Xu,

Hengyu Yang

et al.

Applied Physics Letters, Journal Year: 2025, Volume and Issue: 126(3)

Published: Jan. 20, 2025

Lithium–sulfur (Li–S) batteries have been considered a promising next-generation energy storage device. However, the serious polysulfide shuttle effect and slow reaction kinetics hampered their development. Herein, alkylamine-tuned MoOx with synergistic manipulation of interlayer spacing oxygen vacancies as bifunctional mediator for separator modification (refer to MOC/PP) in Li–S is proposed. The increased provides rapid stable pathway Li+ diffusion, facilitating uniform deposition on lithium anode. Rich serve active sites efficient chemisorption catalysis polysulfide. As demonstrated by theoretical calculations experimental results successively, MOC/PP efficiently captures accelerates redox Therefore, LiǁLi symmetric cells exhibit cycling over 1000 h at current density 1 mA cm−2. full deliver notable discharge-specific capacity 602 mAh g−1 5 C (1 = 1675 g−1) maintain 800 cycles C, 0.07% decay per cycle. Even under conditions lean electrolyte (E/S 7 μL mgs−1) high sulfur mass loading (4.3 mg cm−2), initial exceeds 1200 g−1.

Language: Английский

Citations

1
Conductive Carbon Fibrous Interlayer Embedded with MoS2@CNT Composites for Mitigating Polysulfide Shuttling by Absorption and Catalysis in Lithium–Sulfur Batteries DOI
Shuang Yuan, Ling Lin,

Huahui Chen

et al.

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

Published: March 21, 2025

Lithium–sulfur batteries (LSBs) have emerged as promising energy storage systems due to their high density, low cost, and environmental friendliness. However, the "shuttle effect" of lithium polysulfides (LiPSs) leads rapid capacity decay poor cycle stability in LSBs, hindering further development application LSBs. In addition, it is difficult for existing strategies provide effective adsorption catalytic properties while simultaneously ensuring ion transport. To address this issue, a composite film made carbon fibers embedded with MoS2@CNT proposed an interlayer between separator cathode. Results show that such conductive can effectively capture LiPSs catalyze transformation. The as-assembled LSBs deliver initial discharge-specific 1179.03 mAh/g at 0.5 C, 1086.33 remains after 100 cycles. During long-term cycling tests, discharge capacities 463.13 rate per 0.07% 500 cycles 3 representing reduction 0.06% compared commercial (0.13%). This work demonstrates potential independent design fibrous films composites enhancing battery performance. not only efficient network accelerating transport but also suppress shuttle effect transformation LiPSs, boosting electrochemical reaction kinetics.

Language: Английский

Citations

0