@danielfp248 Hi Daniel, Thanks for the warm welcome! Yes, I have looked at the sulfamate paper and found it interesting. I did start my introduction with I'm an EE, and always see Chemistry through that lenz, I haven't had access to a lab for 2 years and only recently converted my home workshop into a 'lab' :). I do know with confidence that the dominant loss mechanism is polybromide diffusion via the separator and Ec>90% is feasible. So, locking up the free Br is important. Most of my operating experience is with MEP and MEM, and cost is their weakness.
You prompted me to look again at that paper. They use very high current density and report excellent Ec. Now I'm reading your report, and felt that with 1900 cm2, nominal capacity should be more like 9.5 kWh. But also they are only using 1 M ZnBr2 - Redflow would use 2-3 Molar.
I particularly liked your closing comment!
I've been testing alterative electrode materials for oxidation durability and have a cell in the 3D printer right now.
Cheers, Steve
StevenHickey
Posts
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New member introduction thread! -
New member introduction thread!Thanks Kirk, I appreciate the warm welcome! Very much enjoyed the IFBF in Brussels. Forgive the nerding, but being at the hotel where the Solvay conference was held, 1927 I believe - and much else.
One of the last activities I undertook at Redflow was Design Of Experiment for electrode formulation. I enlisted a team of Ugrads and performed a thousand AEO (Accelerated Electrode Oxidation) tests over several months. I've been fortunate to recieve a new coated Titanium foil material, and felt compelled to test it also. That was the motivation to convert my home workshop into a Lab.
It's always amused me the claims of indefinite electrode life
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New member introduction thread!G'day, New member Steve Hickey here, keen to learn and share.
I'm EE (UQ Brisbane Au 1981!), started on batteries with Redflow in 2008. Spent some time at Sandia NL testing ZBM, then seconed in Albuqurque with fam for 3 years. Back in OZ spent 5 years as MRI R&D Engineer, then back to Redflow as CTO.
Over the years I've done a lot of modelling, testing, analysing of the ZB system.
I have set up a home lab, initially corrosion studies on electrode materials, and moving onto 200cm2 single cell system.
I'm very keen to learn about techniques and material sources.Cheers,
Steve