Dynamic evolution of electrocatalytic materials for Li–S batteries

Cheng, Yuan; Li, Hongtai; Liu, Genlin; Zhang, Pan; Mao, Jing; Zhang, Liang

doi:10.1039/d3qm00326d

Cited by 3 publications

(1 citation statement)

References 140 publications

(231 reference statements)

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“…Among various metal compounds, metal oxides and metal sulfides have been widely used as cathode materials for Li-S batteries, and the corresponding research is relatively well developed [30]. Metal oxides have a strong adsorption effect on LiPSs, but their poor electrical conductivity affects the electron transfer during discharging and charging.…”

Section: Introductionmentioning

confidence: 99%

Beaded CoSe2-C Nanofibers for High-Performance Lithium–Sulfur Batteries

Xu,

Ao,

Xie

et al. 2023

Nanomaterials

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Lithium–sulfur (Li-S) batteries are regarded as highly promising energy storage devices due to their high theoretical specific capacity and high energy density. Nevertheless, the commercial application of Li-S batteries is still restricted by poor electrochemical performance. Herein, beaded nanofibers (BNFs) consisting of carbon and CoSe2 nanoparticles (CoSe2/C BNFs) were prepared by electrospinning combined with carbonization and selenization. Benefitting from the synergistic effect of physical adsorption and chemical catalysis, the CoSe2/C BNFs can effectively inhibit the shuttle effect of lithium polysulfides and improve the rate performance and cycle stability of Li-S batteries. The three-dimensional conductive network provides a fast electron and ion transport pathway as well as sufficient space for alleviating the volume change. CoSe2 can not only effectively adsorb the lithium polysulfides but also accelerate their conversion reaction. The CoSe2/C BNFs-S cathode has a high reversible discharge specific capacity of 919.2 mAh g−1 at 0.1 C and presents excellent cycle stability with a low-capacity decay rate of 0.05% per cycle for 600 cycles at 1 C. The combination of the beaded carbon nanofibers and polar metal selenides sheds light on designing high-performance sulfur-based cathodes.

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Section: Introductionmentioning

confidence: 99%

Beaded CoSe2-C Nanofibers for High-Performance Lithium–Sulfur Batteries

Xu,

Ao,

Xie

et al. 2023

Nanomaterials

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Steering sulfur reduction kinetics of lithium-sulfur batteries by interfacial microenvironment modulation

Yuan,

Wang,

Zeng

et al. 2024

Energy Storage Materials

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Prussian Blue Analogue Framework Hosts for Li–S Batteries

Jin,

Krumov,

Mandel

et al. 2024

ACS Energy Lett.

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Lithium−sulfur (Li−S) batteries hold promise for nextgeneration energy storage due to their high theoretical energy density (∼2600 Wh kg −1 ). However, practical use is hindered by capacity loss from the polysulfide shuttle effect and poor energy efficiency due to slow kinetics. To overcome these challenges, we developed a novel sulfur host material featuring highly porous concave nanocubes derived from a Prussian blue analogue. By controlling the annealing conditions, we achieved a high surface area (up to 248 m 2 g −1 ), which enhances polysulfide adsorption, thereby reducing sulfur dissolution and minimizing the loss of cathode capacity during cycling. Operando Raman spectroscopy revealed that this material also provides a synergistic catalytic effect, lowering polarization/overpotentials within Li−S cells. The optimized material enables an extended battery life with high sulfur loading, a low E/S ratio, and excellent capacity retention over long-term cycles, demonstrating its potential to improve Li−S battery performance.

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Dynamic evolution of electrocatalytic materials for Li–S batteries

Abstract: Incorporating highly efficient electrocatalysts into sulfur cathode is a promising strategy to alleviate the detrimental shuttle effect and sluggish conversion kinetics of lithium polysulfides for lithium-sulfur (Li-S) batteries. Despite fruitful...

Cited by 3 publications

References 140 publications

Beaded CoSe2-C Nanofibers for High-Performance Lithium–Sulfur Batteries

Beaded CoSe2-C Nanofibers for High-Performance Lithium–Sulfur Batteries

Steering sulfur reduction kinetics of lithium-sulfur batteries by interfacial microenvironment modulation

Prussian Blue Analogue Framework Hosts for Li–S Batteries

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