Application and mechanism of supercritical CO2 fluid technology in electrolyte recovery
LIU Lingling
Abstract：Against the backdrop of accelerating global carbon neutrality strategies,the large-scale retirement of lithium-ion batteries has created an increasingly urgent demand for green electrolyte recycling.However,traditional recycling processes face dual safety challenges:volatile losses of organic solvents and the production of highly toxic hydrofluoric acid from lithium salt hydrolysis.This paper focuses on the innovative application of supercritical carbon dioxide fluid technology,systematically investigating its key mechanisms in the resource recovery of waste electrolytes:elucidating the selective extraction principle for carbonate solvents based on density-tunable solvation effects;overcoming compatibility limitations for highly polar components through polar entrainment agents;and achieving safe lithium salt separation by leveraging the inherently low solubility of ionic compounds in nonpolar supercritical systems.This research aims to provide theoretical and technical foundations for developing efficient,environmentally sustainable electrolyte recycling processes.
Keywords：supercritical CO₂lithium-ion batterieselectrolyte recycling
Publication Date：2025-12-25
Online Publishing Date：2026-01-06(First online date of this platform, not the publication date of the document)
Pages：4( 530-533 )