METHOD FOR TESTING AND ANALYZING CYCLING STABILITY OF ELECTROCHROMIC MATERIAL BASED ON MULTI-CYCLE DOUBLE-STEP TIMING ANALYSIS TECHNOLOGY

摘要

A method for testing and analyzing the cycling stability of an electrochromic material based on multi-cycle double-step timing analysis technology, relating to the technical field of test and analysis of functional materials. An electrochromic film is tested by multi-cycle double-step technology, a quantity of extracted charge Q_ex and a quantity of injected charge Q_in are respectively obtained by analysis, cycling reversibility value of the film, i.e., R=Q_ex/Q_in can be directly obtained according to the ratio Q_ex/Q_in of the two quantities, and therefore, the requirement of researchers on the evaluation of the cycling performance of an electrochromic material can be met. According to the technology, a total response charge Q can be divided into three parts, i.e., Faraday charge Q_f, adsorption charge Q_ads, and electric double-layer charge Q_dl from the deep theoretical level. By comparing variations of Q_f and Q_dl+nFAT in multi-cycle, the influence factors of transfer characteristics of ions and electrons in a reaction system and the cycling stability of a film are determined, so that the study and modification on the electrochromic performance and the cycling life of the film are facilitated.