1400小时超长待机 我科学家破译锌溴液流电池长寿命“密码”

Core Insights - The research team led by Li Xianfeng from the Dalian Institute of Chemical Physics has made significant progress in the development of a new bromine-based flow battery system, achieving proof of concept for long-life zinc-bromine flow batteries and scaling up the system [1][4] Group 1: Technology Development - The new bromine-based flow battery relies on a dual electron transfer reaction system, which effectively reduces the concentration of bromine ions (Br) in the electrolyte, thereby enhancing the battery's energy density and lifespan [2][3] - By introducing amine compounds as bromine scavengers in the bromine electrolyte, the team has successfully converted generated Br into brominated amine compounds, significantly lowering the corrosiveness of the electrolyte [2] Group 2: Performance Metrics - In tests scaled to a 5kW system, the zinc-bromine flow battery demonstrated stable operation for over 700 cycles at a current density of 40 mA cm-2, with a total lifespan exceeding 1400 hours and an energy efficiency of over 78% [3] - The use of a low-cost and less corrosion-resistant SPEEK membrane did not affect the battery's performance, as no corrosion was observed in key materials such as current collectors, electrodes, and membranes after cycling [3] Group 3: Implications for Future Applications - This research provides a new approach for designing long-life bromine-based flow batteries, laying the groundwork for further applications and commercialization of zinc-bromine flow batteries [4]