Probe for operando in situ electrochemical nuclear magnetic resonance spectroscopy
US11215686B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 2, 2021 |
| Grant date | Jan 4, 2022 |
| Priority date | — |
| Expiry date | Feb 2, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/345
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Electrochemical devices with metal casings have been considered incompatible with nuclear magnetic resonance (NMR) spectroscopy because the oscillating magnetic fields (“rf fields”) responsible for excitation and detection of NMR active nuclei do not penetrate metals. According to the present invention, rf fields can still efficiently penetrate into nonmetallic layers of electrochemical cells (such as a coin cell battery configuration) provided the magnetic field is oriented tangentially to the electrochemical cell electrodes in a “skimming” orientation. As an example, noninvasive high field in situ 7Li and 19F NMR of an unmodified commercial off-the-shelf rechargeable coin cell was demonstrated using a traditional external NMR coil setup. The in operando NMR measurements revealed that irreversible physical changes accumulate at the anode during electrochemical cycling.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.