RE: Longevity18 Nov 2018 11:15
Yes Daz, the difference between electrode longevity alone and in the stack is an 'elephant in the room'.
I was not sure from the AGM presentation whether they really decay faster in the stack, or whether testing had not gone on for long enough to know. For single electrodes they seem to have a way of 'accelerated testing' which predicts how long they will last while testing for a shorter time than two years. This may not work for electrodes in the stack, so just takes them longer to know.
However, the recent update did say this.
Electrode manufacture: recent test data has indicated that the partnership with electrode manufacturer Industrie De Nora will lead to significantly lower build costs for the fuel cell while increasing the longevity of the electrodes. The composition of electrodes for commercial deployment is now being finalised in anticipation of first customer shipment to Southern Oil.
· Flow plate and stack manufacture: the selection of a manufacturing partner for the production of the fuel cell flow plates is at an advanced stage and the Company expects to provide an update in the coming weeks. The Company has completed the plate design to optimise flow of gases and liquids to the electrodes.
AFC Energy has established further improvements in electrode longevity and cost reduction through its joint development activities with Industrie De Nora and is in the final stages of confirming an electrode pairing for the Southern Oil project in Australia. These electrodes are expected to be supplied by Industrie De Nora to AFC Energy in Q1 2019, subject to agreement on the terms of a Strategic Electrode Supply Agreement.
The Company expects to finalise its appointment of a mass-produced flow plate manufacturer by the end of 2018, following an international competitive tender. The process is expected to result in further cost reductions on a "per part" basis relative to earlier cost modelling conducted by the Company and reinforces the decision by AFC Energy to outsource this key manufacturing activity. The design of AFC Energy's new flow plate has all fuel cell components integrated within a single sub-assembly, which is expected to deliver not only material improvements in system performance, but also a more streamlined and robust quality control function to help eliminate potential failure modes.
Any reduction in costs is as good as extending longevity for the final cost of the product. They also say they have improved flow of gasses/liquids over the plates. That could mean that electrodes last longer in the stack.
You are correct that it would be nice to have a number for where they are now, but perhaps if that is improving all the time they dont want to be specific. Certainly, if they have improved cost/longevity from the AGM they must be below the 10c mark by now. That must be low enough to make a competitive product for some applications.