Patents
US 11162913 B2: Analysis of electrochemical impedance spectra using phase angle symmetry across log frequency
- Granted
- 2021-11-02
- Filed
- 2020-03-19 application 16823686
- Type
- Utility · 23 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A method is disclosed for analysis of the impedance behavior of electrochemical impedance circuits or the Transfer Function for input-output systems, utilizing the symmetry of the phase angle response with the Log of the frequency to allow for determination of the lower frequency half of the impedance response over Log frequency based only on information from the upper half response. The underlying analytical basis for the symmetry of the phase angle and the methods for applying this analysis are applicable to simple R-C circuits, Randle circuits, Constant Phase Element (CPE)-Randles and coating model circuits. Symmetric functions describing the derivative of the phase angle, θ, with respect to the Log of the frequency can be used to determine the circuit elements requiring only the high frequency information. Only knowledge of the high frequency-based response is needed to know how the low frequency range behaves. Capturing high frequency impedance can be done in a few seconds compared with many hours of experimental effort to obtain low frequency behavior, to allow for continuous monitoring of polarization resistance with only a few seconds of data capture required. The method is applicable to numerous sensor applications across a range of disciplines including corrosion focused industries, battery technology and bioelectrochemical fields, and applicable to other Transfer Function analyses that include such as dielectric relaxation and complex modulus.
Source: PVGPATDIS, file of 2026-04-10 (ipg211102.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| Clemson University 122 patents | US company or organization | Clemson, SC | Clemson University State business registration EXACT high confidence: identical full name and state Clemson University College or university EXACT high confidence: identical full name and state | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Jeremy Gilbert | Clemson, SC | 12 | PVGPATDIS, file of 2026-04-10 | |
| Piyush Khullar | Clemson, SC | 1 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| G01N | Investigating or analysing materials by determining their chemical or physical properties | G01N17/02 | PVGPATDIS, file of 2026-04-10 |
Cooperative Patent Classification, as currently assigned (one row per subclass).
Assignments and security interests
| Recorded | What | From | To | Reel/frame | Source |
|---|---|---|---|---|---|
| 2021-04-06 | Assignment Assignment of assignor's interest | GILBERT, JEREMY L. signed 2021-04-02 KHULLAR, PIYUSH signed 2021-04-02 | CLEMSON UNIVERSITY CLEMSON, SC | 55837/536 | ECORSEXC, file of 2026-09-25 |
Documents recorded with the USPTO Assignment Recordation Branch that list this patent. A security interest is a lender’s claim on the patent as collateral; a release ends it.
USPTO bulk data: PatentsView granted patents, disambiguated (PVGPATDIS) for patents, assignees, inventors, places and CPC categories; the USPTO Patent Assignment Dataset (ECORSEXC) for assignments and security interests. Patents filed in the last 20 years. No claims or full text. Links to other records are by name (and state): EXACT means the identical full name and state; FUZZY means a looser name match, with the confidence shown.