Method combining waste ternary positive electrode material recovery and electrochemical hydrogen production

Abstract

The invention relates to a method for combining waste ternary positive electrode material recovery and electrochemical hydrogen production. The method comprises the following steps of (1) recovering a waste ternary positive electrode material and carrying out mechanical activation, sieving and drying on the same to obtain waste ternary positive electrode material recovered powder; (2) mixing the waste ternary positive electrode material recovered powder with a conductive agent and an adhesive, dispersing the same in an N-methyl pyrrolidone solution, and carrying out coating, and drying to obtain a pole piece; (3) taking the pole piece as a positive electrode, taking an inert electrode as a negative electrode, charging the same in an electrolyte solution, generating hydroxide precipitates of nickel and manganese at the positive electrode, and generating hydrogen at the negative electrode; and (4) after the reaction is finished, carrying out solid-liquid separation on a reaction system to obtain a lithium-rich solution, the hydroxide precipitates of the nickel and the manganese and the positive pole piece, and carrying out high-temperature calcination on the positive pole piece to obtain an oxide of cobalt. According to the method, the resource recycling of the waste ternary positive electrode material is realized in a simple, quick, low-energy-consumption and environment-friendly mode.

Description

technical field

[0001] The invention relates to the technical field of waste lithium ion battery recovery and electrochemical hydrogen production, and in particular to a method for combining waste and old ternary positive electrode material recovery and electrochemical hydrogen production. Background technique

[0002] Since the successful commercialization of lithium-ion batteries in the early 1990s, they have been widely used in mobile electronic devices, electric vehicles, and power grids due to their long service life, high energy density, and wide operating temperature range. In recent years, as countries around the world have gradually escalated their attention to energy and environmental issues, the demand for the development of new energy vehicles, hybrid or electric vehicles has further expanded. According to statistics, in 2019, the output of new energy vehicles in China was 1.242 million, and the number of vehicles in stock exceeded 3.81 million. The market size r...