Unraveling the Atomic-Level Manipulation Mechanism of Li₂ S Redox Kinetics via Electron-Donor Doping for Designing High-Volumetric-Energy-Density, Lean-Electrolyte Lithium-Sulfur Batteries.

ABSTRACT: Designing dense thick sulfur cathodes to gain high-volumetric/areal-capacity lithium-sulfur batteries (LSBs) in lean electrolytes is extremely desired. Nevertheless, the severe Li₂ S clogging and unclear mechanism seriously hinder its development. Herein, an integrated strategy is developed to manipulate Li₂ S redox kinetics of CoP/MXene catalyst via electron-donor Cu doping. Meanwhile a dense S/Cu_0.1 Co_0.9 P/MXene cathode (density = 1.95 g cm^-3 ) is constructed, which presents a large volumetric capacity of 1664 Ah L^-1 (routine electrolyte) and a high areal capacity of ≈8.3 mAh cm^-2 (lean electrolyte of 5.0 µL mg_s ^-1 ) at 0.1 C. Systematical thermodynamics, kinetics, and theoretical simulati

SUBMITTER: Shan J 

PROVIDER: S-EPMC9685476 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature