In response to the demand for technological upgrading in the industry, Hebei Vanadium Sheng Technology Co., Ltd. (hereinafter referred to as "Vanadium Sheng Technology") started the research and development project of mixed acid (sulfuric acid/hydrochloric acid) system electrolyte for all vanadium redox flow batteries. This research and development focuses on the optimization of the core performance of the electrolyte, aiming to enhance the competitiveness of products through technological innovation and provide support for the scenario application of the all-vanadium flow battery.

As the core component of the all-vanadium redox flow battery, the electrolyte plays the key role of "energy carrier". Its performance directly affects the energy storage capacity, reaction rate and cycle life of the battery, and the cost accounts for about 50% of the total cost of the system. At present, the commercial electrolyte in the industry mostly uses sulfuric acid system, and there is room for improvement in the utilization rate of vanadium ions and the adaptability of working temperature. Based on the current situation of this industry, the research and development team of Vanadium Sheng Science and Technology has launched a special research and development of mixed acid electrolyte. The core objectives include three aspects: first, to improve the utilization rate of vanadium ions and optimize the energy storage efficiency of the battery; The second is to broaden the working temperature range of the electrolyte and enhance the adaptability of the battery in different environments. The third is to explore more economical technical solutions on the premise of ensuring performance.

Up to now, the project has completed the preliminary technical research and preliminary laboratory exploration. In the laboratory environment, the energy density of the mixed acid electrolyte (vanadium concentration 2.0 mol/L) reached 27 Wh/kg. In the future, the R & D team will continue to promote formula optimization, performance verification and other work, carry out laboratory deepening research and pilot verification as planned, and steadily promote the landing transformation of technical achievements.

This research and development work is an important layout in the field of all-vanadium liquid flow battery energy storage core materials, the future company will continue to focus on technological innovation, pragmatic promotion of product iteration, for the energy storage industry to contribute to the high-quality development.