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Title: Root cause analysis of the degradation in a unitized regenerative fuel cell

Authors:
; ; ORCiD logo
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1397484
Grant/Contract Number:
AC36-08G028308
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Journal of Power Sources
Additional Journal Information:
Journal Volume: 343; Journal Issue: C; Related Information: CHORUS Timestamp: 2017-10-04 21:10:03; Journal ID: ISSN 0378-7753
Publisher:
Elsevier
Country of Publication:
Netherlands
Language:
English

Citation Formats

Bhosale, Amit C., Meenakshi, S., and Ghosh, Prakash C. Root cause analysis of the degradation in a unitized regenerative fuel cell. Netherlands: N. p., 2017. Web. doi:10.1016/j.jpowsour.2017.01.060.
Bhosale, Amit C., Meenakshi, S., & Ghosh, Prakash C. Root cause analysis of the degradation in a unitized regenerative fuel cell. Netherlands. doi:10.1016/j.jpowsour.2017.01.060.
Bhosale, Amit C., Meenakshi, S., and Ghosh, Prakash C. Wed . "Root cause analysis of the degradation in a unitized regenerative fuel cell". Netherlands. doi:10.1016/j.jpowsour.2017.01.060.
@article{osti_1397484,
title = {Root cause analysis of the degradation in a unitized regenerative fuel cell},
author = {Bhosale, Amit C. and Meenakshi, S. and Ghosh, Prakash C.},
abstractNote = {},
doi = {10.1016/j.jpowsour.2017.01.060},
journal = {Journal of Power Sources},
number = C,
volume = 343,
place = {Netherlands},
year = {Wed Mar 01 00:00:00 EST 2017},
month = {Wed Mar 01 00:00:00 EST 2017}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1016/j.jpowsour.2017.01.060

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  • Fuel cells can operate on hydrogen fuel and oxygen from air. If the fuel cell is designed to also operate in reverse as an electrolyzer, then electricity can be used to convert the water back into hydrogen and oxygen. This dual function system is known as a reversible or unitized regenerative fuel cell. This is an excellent energy source in situations where weight is a concern.
  • No abstract prepared.
  • Light- and elevated temperature-induced degradation (LeTID) is a detrimental effect observed under operating conditions in p-type multicrystalline silicon (mc-Si) solar cells. In this paper, we employ synchrotron-based techniques to study the dissolution of precipitates due to different firing processes at grain boundaries in LeTID-affected mc-Si. The synchrotron measurements show clear dissolution of collocated metal precipitates during firing. We compare our observations with degradation behavior in the same wafers. The experimental results are complemented with process simulations to provide insight into the change in bulk point defect concentration due to firing. Several studies have proposed that LeTID is caused by metal-richmore » precipitate dissolution during contact firing, and we find that the solubility and diffusivity are promising screening metrics to identify metals that are compatible with this hypothesis. While slower and less soluble elements (e.g., Fe and Cr) are not compatible according to our simulations, the point defect concentrations of faster and more soluble elements (e.g., Cu and Ni) increase after a high-temperature firing process, primarily due to emitter segregation rather than precipitate dissolution. Finally, these results are a useful complement to lifetime spectroscopy techniques, and can be used to evaluate additional candidates in the search for the root cause of LeTID.« less
  • Energy storage systems with extremely high specific energy (>400 Wh/kg) have been designed that use lightweight pressure vessels to contain the gases generated by reversible (unitized) regenerative fuel cells (URFCs).[1] URFC systems are being designed and developed for a variety of applications, including high altitude long endurance (HALE) solar rechargeable aircraft (SRA), zero emission vehicles (ZEVs), hybrid energy storage/propulsion systems for spacecraft, energy storage for remote (off-grid) power sources, and peak shaving for on-grid applications.[1-10] Energy storage for HALE SRA was the original application for this set of innovations, and a prototype solar powered aircraft (Pathfinder-Plus) recently set another altitudemore » record for all propeller-driven aircraft on August 6, 1998, when it flew to 80,285 feet (24.47 km).[11]« less