Data for "Mock Ink Development and Coating Processes Design for Proton Exchange Membrane Water Electrolyzer Anodes.” This work addresses the development of surrogate inks to reduce the cost of coating process development for more expensive iridium oxide inks. Rheological properties of iridium oxide inks are closely replicated with cheaper titania inks by matching calculable properties of each ink. The present data set contains a combination of rheological ink characterization, large-area imaging of iridium oxide and titania coatings, smaller area optical microscopy, and device performance data from emerging iridium oxide ink formulations.
| Name | Size | Type | Resource Description | History |
|---|---|---|---|---|
| Rheological Data | 39 KB | Data | This file contains shear rates and corresponding viscosities from steady shear rheological measurements. The two sheets contain data for iridium oxide and titania inks with two different kinds of ionomer. Each sheet also contains rheological measurements for ionomer solutions whose weight percent of ionomer in solvent corresponds to the same weight percent in ionomer for the iridium oxide and titania inks. | |
| Large Area Image of D2020 IrOx Coating | 81 KB | Image | This file is a large-area, backlit image of an iridium-oxide based coating cast on ETFE film using a Mini-Labo roll-to-roll coating system. The coating ink contained n-propanol, water, a moderate equivalent weight long side chain ionomer, and iridium oxide. | |
| Large Area Image of D2020 TiO2 Coating | 116 KB | Image | This file is a large-area, backlit image of a titania based coating cast on ETFE film using a Mini-Labo roll-to-roll coating system. The coating ink contained n-propanol, water, a moderate equivalent weight long side chain ionomer, and titania. | |
| Large Area Image of Low EW IrOx Coating 1 | 142 KB | Image | This file is a large-area, backlit image of an iridium oxide based coating cast on ETFE film using a Mini-Labo roll-to-roll coating system. The coating ink contained isopropanol, water, a low equivalent weight short side chain ionomer, and iridium oxide. This ink contained 10 weight percent iridium oxide and was coated with a wet thickness of ~54 microns. | |
| Large Area Image of Low EW IrOx Coating 2 | 139 KB | Image | This file is a large-area, backlit image of an iridium oxide based coating cast on ETFE film using a Mini-Labo roll-to-roll coating system. The coating ink contained isopropanol, water, a low equivalent weight short side chain ionomer, and iridium oxide. This ink contained 10 weight percent iridium oxide and was coated with a wet thickness of ~27 microns. | |
| Large Area Image of Low EW IrOx Coating 3 | 104 KB | Image | This file is a large-area, backlit image of an iridium oxide based coating cast on ETFE film using a Mini-Labo roll-to-roll coating system. The coating ink contained isopropanol, water, a low equivalent weight short side chain ionomer, and iridium oxide. This ink contained 12.5 weight percent iridium oxide and was coated with a wet thickness of ~46 microns. | |
| Large Area Image of Low EW IrOx Coating 4 | 153 KB | Image | This file is a large-area, backlit image of an iridium oxide based coating cast on ETFE film using a Mini-Labo roll-to-roll coating system. The coating ink contained isopropanol, water, a low equivalent weight short side chain ionomer, and iridium oxide. This ink contained 10 weight percent iridium oxide and was coated with a wet thickness of ~23 microns. | |
| Large Area Image of Low EW TiO2 Coating 1 | 175 KB | Image | This file is a large-area, backlit image of a titania based coating cast on ETFE film using a Mini-Labo roll-to-roll coating system. The coating ink contained isopropanol, water, a low equivalent weight short side chain ionomer, and titania. This ink contained 3.8 weight percent titania and was coated with a wet thickness of ~54 microns. | |
| Large Area Image of Low EW TiO2 Coating 2 | 508 KB | Image | This file is a large-area, backlit image of a titania based coating cast on ETFE film using a Mini-Labo roll-to-roll coating system. The coating ink contained isopropanol, water, a low equivalent weight short side chain ionomer, and titania. This ink contained 3.8 weight percent titania and was coated with a wet thickness of ~27 microns. | |
| Large Area Image of Low EW TiO2 Coating 3 | 140 KB | Image | This file is a large-area, backlit image of a titania based coating cast on ETFE film using a Mini-Labo roll-to-roll coating system. The coating ink contained isopropanol, water, a low equivalent weight short side chain ionomer, and titania. This ink contained 5.0 weight percent titania and was coated with a wet thickness of ~46 microns. | |
| Large Area Image of Low EW TiO2 Coating 4 | 146 KB | Image | This file is a large-area, backlit image of a titania based coating cast on ETFE film using a Mini-Labo roll-to-roll coating system. The coating ink contained isopropanol, water, a low equivalent weight short side chain ionomer, and titania. This ink contained 5.0 weight percent titania and was coated with a wet thickness of ~23 microns. | |
| Optical Microscopy D2020 IrOx Coating | 248 KB | Image | This file is a small-area, backlit image of an iridium oxide based coating cast on ETFE film using a Mini-Labo roll-to-roll coating system. The coating ink contained n-propanol, water, a moderate equivalent weight long side chain ionomer, and iridium oxide. This ink contained 20 weight percent iridium oxide and was coated with a wet thickness of ~28 microns. The small-area image was captured at 100x magnification with a Keyence VHX 7000 digital optical microscope. | |
| Optical Microscopy Low EW IrOx Coating 1 | 659 KB | Image | This file is a small-area, backlit image of an iridium oxide based coating cast on ETFE film using a Mini-Labo roll-to-roll coating system. The coating ink contained isopropanol, water, a low equivalent weight short side chain ionomer, and iridium oxide. This ink contained 10 weight percent iridium oxide and was coated with a wet thickness of ~54 microns. The small-area image was captured at 100x magnification with a Keyence VHX 7000 digital optical microscope. | |
| Optical Microscopy Low EW IrOx Coating 2 | 585 KB | Image | This file is a small-area, backlit image of an iridium oxide based coating cast on ETFE film using a Mini-Labo roll-to-roll coating system. The coating ink contained isopropanol, water, a low equivalent weight short side chain ionomer, and iridium oxide. This ink contained 10 weight percent iridium oxide and was coated with a wet thickness of ~27 microns. The small-area image was captured at 100x magnification with a Keyence VHX 7000 digital optical microscope. | |
| Optical Microscopy Low EW IrOx Coating 3 | 685 KB | Image | This file is a small-area, backlit image of an iridium oxide based coating cast on ETFE film using a Mini-Labo roll-to-roll coating system. The coating ink contained isopropanol, water, a low equivalent weight short side chain ionomer, and iridium oxide. This ink contained 12.5 weight percent iridium oxide and was coated with a wet thickness of ~46 microns. The small-area image was captured at 100x magnification with a Keyence VHX 7000 digital optical microscope. | |
| Optical Microscopy Low EW IrOx Coating 4 | 595 KB | Image | This file is a small-area, backlit image of an iridium oxide based coating cast on ETFE film using a Mini-Labo roll-to-roll coating system. The coating ink contained isopropanol, water, a low equivalent weight short side chain ionomer, and iridium oxide. This ink contained 12.5 weight percent iridium oxide and was coated with a wet thickness of ~23 microns. The small-area image was captured at 100x magnification with a Keyence VHX 7000 digital optical microscope. | |
| Short Galvanostatic Holds | 8.2 MB | Data | This file contains cell voltages recorded during a short (~50 hours) galvanostatic hold for two PEM water electrolysis MEAs. | |
| Beginning of Life Nonfaradaic EIS Slot Die Low EW Sample | 5 KB | Document | This file contains beginning-of-life non-Faradaic electrochemical impedance spectroscopy data for the slot-die-coated, low-loaded iridium oxide anode produced from the 10wt% iridium oxide ink in 3:1 ispropanol:water with Aquivion 720 equivalent weight ionomer. | |
| End of Test Nonfaradaic EIS Slot Die Low EW Sample | 5 KB | Document | This file contains end-of-test non-Faradaic electrochemical impedance spectroscopy data for the slot-die-coated, low-loaded iridium oxide anode produced from the 10wt% iridium oxide ink in 3:1 ispropanol:water with Aquivion 720 equivalent weight ionomer. | |
| Beginning of Life Nonfaradaic EIS Microgravure D2020 Sample | 5 KB | Document | This file contains beginning-of-life non-Faradaic electrochemical impedance spectroscopy data for a Microgravure-coated, low-loaded iridium oxide anode produced from a 20wt% iridium oxide ink in 1:1 n-propanol:water with D2020 ionomer. | |
| End of Test Nonfaradaic EIS Microgravure D2020 Sample | 5 KB | Document | This file contains end-of-test non-Faradaic electrochemical impedance spectroscopy data for a Microgravure-coated, low-loaded iridium oxide anode produced from a 20wt% iridium oxide ink in 1:1 n-propanol:water with D2020 ionomer. | |
| Polarization Curves for Low EW and D2020 MEAs | 24 KB | Data | This file contains polarization curves and high frequency resistances measured at beginning of life and end of test for the Microgravure-coated, D2020-based iridium oxide anode and the slot-die-coated, Aquivion-720-based iridium oxide anode. |
Keywords
Submitted
• Sep •
27
2026
Cite This Dataset
Iyer, Radhika, Anirban Roy, Luis Perales, Sarah Blair, Chaiwat Engtrakul, Sunilkumar Khandavalli, Scott Mauger, and Chance Parrish. 2026. "Data Associated with "Mock Ink Development and Coating Processes Design for Proton Exchange Membrane Water Electrolyzer Anodes"." NLR Data Catalog. Golden, CO: National Laboratory of the Rockies. Last updated: October 2, 2026. DOI: 10.7799/17067933.
About This Dataset
337
10.7799/17067933
NLR/JA-5900-100143
Public
10/02/2026
DOE Project
Roll-to-Roll Consortium
Facilities
Energy Systems Integration Facility (ESIF)
Materials & Chemical Science & Technology (MCS)
Funding Organization
Department of Energy (DOE)
Sponsoring Organization
USDOE Office of Critical Minerals and Energy Innovation (CMEI), Office of Energy Technology (E-Tech). Alternative Fuels and Feedstocks Office
Research Areas
Hydrogen and Fuel Cells
License
View License
Digital Object Identifier
10.7799/17067933