Electronegativity-induced modulation of polysulfide adsorption in halogen-doped Ni2P to accelerate conversion kinetics for lithium-sulfur batteries

Journal of Energy Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: April 1, 2025

Language: Английский

Accelerating the Catalytic Conversion of Polysulfides in Lithium–Sulfur Batteries from Both the Cathode and the Separator Perspectives

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

Published: April 28, 2025

Lithium-sulfur (Li-S) batteries have a high theoretical energy density and are regarded to be an ideal choice for the next generation of electrochemical storage systems. However, their practical application is hindered by several bottlenecks, including insulating nature sulfur its discharge products (Li2S2/Li2S), shuttling behavior intermediate polysulfides, slow redox reactions. Herein, we propose highly efficient bimetallic selenide electrocatalyst featuring hollow porous core-shell spherical structure, which serves as both cathode host modified separator coated on commercially available polypropylene address above issues. The enhances conductivity, unique structure provides rapid ion transport channels, along with ample spatial confinement lithium polysulfides. Additionally, abundant reactive sites selenides exhibit intrinsic electrocatalytic activity, accelerating polysulfide conversion improving kinetics. Density functional theory calculations indicate that interact more strongly polysulfides present lower reaction barriers compared those sulfide counterparts. Consequently, these materials demonstrate superior rate performance cycling stability in Li-S batteries, achieving impressive lifespan 1400 cycles minimal decay 0.030% per cycle at 1.0 C. This work insights into enhancing transition metal compounds batteries.

Language: Английский

Enhanced Lithium Polysulfide Conversion via the Second Current Collector Based on Multitransition-Metal-Phosphides for Li–S Batteries

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

Published: March 6, 2025

Language: Английский