全钒液流电池隔膜Nafion与SPEEK改性研究进展OA

Nafion is the most widely used separator in all vanadium flow batteries(VRFB),which has high proton conductivity,but poor selectivity for metal vanadium ions and high price.As powerful substitute for Nafion dia-phragm,sulfonated polyether ether ketone membrane(SPEEK)has strong selectivity for metal vanadium ions,but its stability and proton conductivity still need to be improved.At present,the performance of battery diaphragm is often improved by modification.Nafion membrane modification method mainly involves organic modification,inorganic modification and surface modification,SPEEK membrane modification method mainly involves organic modification,inorganic modification and crosslinking modification.The research progress of various modification methods was reviewed,and the modification status of other common non-fluoride membranes such as sulfonated polyimide(SPI),sulfonated polyether sulfone(SPES)and sulfonated polyether ketone(SPAEK)was summarized.In the future,dia-phragm research can be conducted from cost to performance.In the future,the diaphragm research can seek break-throughs from the three aspects of cost,performance and technical feasibility,and lay the foundation for the large-scale application of vanadium flow batteries in China.