Method for leaching positive electrode powder of waste lithium battery in neutral environment by utilizing common desulfurization vibrio

By utilizing the bioleaching technology of common desulfurizing Vibrio in a neutral environment, and taking advantage of its sulfur cycle metabolism mechanism and extracellular electron transfer function, the problems of acidic wastewater generation and poor selectivity in traditional bioleaching technologies have been solved, achieving efficient and selective recovery and simplified separation of valuable metals in lithium battery cathode materials.

CN121759700AActive Publication Date: 2026-03-31NORTHEASTERN UNIV CHINA
6 Cites 0 Cited by

Patent Information

Application Number
CN202610263035.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-05
Publication Date
2026-03-31
Estimated Expiration
2046-03-05

AI Technical Summary

Technical Problem

Existing bioleaching technologies often rely on highly acidophilic bacteria, which leads to the generation of highly acidic wastewater and the risk of equipment corrosion. Furthermore, traditional neutral strains have poor leaching selectivity, making subsequent separation difficult and increasing the difficulty and cost of lithium resource separation and purification.

Method used

Bioleaching is carried out using common desulfurizing Vibrio bacteria in a neutral environment. By utilizing its unique sulfur cycle metabolic mechanism and extracellular electron transfer function, the metal dissolution is promoted through organic acids and extracellular electron transfer, and the in-situ precipitation reaction of sulfides produced by metabolism is used to achieve preferential and selective recovery of lithium.

Benefits of technology

The method achieves efficient leaching and directional separation of valuable metals in various waste lithium battery cathode materials under neutral conditions, reduces the content of impurity metals in the leachate, simplifies the subsequent separation process, avoids the generation of acidic waste liquid and equipment corrosion, and is environmentally friendly and economically feasible.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention discloses a method for leaching anode powder of a waste lithium battery in a neutral environment by utilizing common desulfurization vibrio, and belongs to the technical field of waste battery metal resource recovery treatment and biological metallurgy. The method comprises the following steps: inoculating common desulfurization vibrio obtained through gradient domestication into an improved culture medium, then activating a bacterial liquid, and constructing a biological leaching system, so that the biological leaching of valuable metals in waste NCM, NCA, LFP, LCO, LMO and other positive electrode materials is realized. According to the method, common desulfurization vibrio is creatively adopted as a leaching strain, the dependence of traditional biological leaching on acidophilic bacteria is abandoned, efficient dissolution and directional separation of valuable metals in various waste LIBs positive electrode materials are achieved under the mild neutral condition, and a brand-new microbial technical scheme is provided for waste LIBs positive electrode valuable metal recovery.
Need to check novelty before this filing date? Find Prior Art