In situ analysis of MEA performance under accelerated degradation testing

Abstract

SUMMARYThe durability of proton exchange membrane fuel cells is one of the key issues hindering their widespread commercialization. This study uses the complex accelerating degradation protocol to investigate the performance decay of a membrane electrode assembly. The complex accelerating protocol includes OCV, RH cycling and load cycling. Linear sweep voltammetry, cyclic voltammetry, AC impedance and polarization curves were used to measure key MEA characteristics. The experimental results in this work revealed that the Nafion s film underwent significant thinning after the 1040th cycle. Moreover, during accelerated degradation testing, the electrochemical surface area decreased and was therefore found to be the main factor affecting the performance decay of the MEA.

Subspace-based modeling and parameter identification of lithium-ion batteries

“…The Hybrid Pulse Power Characterization test in was designed to determine dynamic power capability over the battery's usable charge and voltage range. And the accelerating degradation test in was used to investigate the performance decay of a membrane electrode assembly. In this research, we use the inverse‐repeated M‐sequence as the input current for the battery identification test.…”

Degradation mechanism study of PTFE/Nafion membrane in MEA utilizing an accelerated degradation technique

“…R.H. cycling would lead to membrane swelling/ shrinking, which then results in membrane fatigue. On the other hand, the OCV would bring out the hydroxyl radicals emanating from minor H 2 O 2 production which results in a reduction in membrane thickness that ultimately leads to failure [22,23].…”