Method for producing electrolyte of all-vanadium redox flow battery

• Main Authors: LIU JIANLU, XIA JINFANG, WU YUQI, WANG QI, LING QI, LI QINGCAN, ZHANG TIANSHU, SHI LIN
• Format: Patent
• Language: Chinese; English
• Published: 24.05.2024
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention discloses a method for producing an all-vanadium redox flow battery electrolyte, which comprises the following steps of: adding crushed vanadium pentoxide into an acid solution for dissolving, adding part of a reducing agent to prepare a vanadium turbid solution, and filtering to obtain a vanadium clear solution; adding a reducing agent into the vanadium clear liquid for reduction reaction to obtain raw material liquid; after being subjected to ultrafiltration, the raw material liquid is subjected to continuous electrolytic reduction to generate an electrolyte product with the valence of + 3-+ 3.6, and anode liquid is recycled to prepare vanadium clear liquid. According to the method, a reaction coupling mechanism is established between anolyte and raw material liquid preparation, heat recovery and other means are adopted, the process production efficiency and stability are improved, the energy consumption level and the equipment cost are reduced, meanwhile, the electrolytic raw material liquid