Apparatus for analyzing active material of secondary battery and method of analyzing active material using the same

Patent metadata

Field	Value
Publication number	US-9970906-B2
Application number	US-201514734229-A
Country	US
Kind code	B2
Filing date	Jun 9, 2015
Priority date	Aug 21, 2014
Publication date	May 15, 2018
Grant date	May 15, 2018

Abstract

An apparatus for analyzing an active material of a secondary battery may include: a first electrode; a piezoelectric layer on the first electrode; a second electrode on the piezoelectric layer, configured to provide a voltage having a polarity opposite to a polarity of the first electrode; and/or an insulating layer on the second electrode and including a through hole exposing a portion of the second electrode. A method of analyzing an active material of a secondary battery may include: disposing an active material in a through hole of a bulk acoustic resonator, in which a first electrode, a piezoelectric layer, a second electrode, and an insulating layer are stacked; measuring a resonance frequency of the resonator by applying an electric signal to the first and second electrodes of the resonator; and/or measuring a weight of the active material in the through hole, based on the measured resonance frequency.

First claim

What is claimed is:

1. An apparatus for analyzing an active material of a secondary battery, the apparatus comprising:
a first electrode;
a piezoelectric layer on the first electrode;
a second electrode on the piezoelectric layer, configured to provide a voltage having a polarity opposite to a polarity of the first electrode;
a third electrode spaced apart from the second electrode; and
an insulating layer on the second electrode, the insulating layer comprising a first through hole exposing a portion of the second electrode and a second through hole not overlapping the second electrode and spaced apart from the first through hole,
wherein the second through hole exposes a portion of the third electrode.

2. The apparatus of claim 1 , wherein a first active material is injected in the first through hole, and
wherein a weight of the first active material accommodated in the first through hole is detected based on a resonance frequency generated in the piezoelectric layer.

3. The apparatus of claim 2 , wherein a second active material, having a different charge and discharge potential from the first active material, is injected in the second through hole.

4. The apparatus of claim 1 , wherein a chamber layer, which encloses the first and second through holes and in which an electrolyte is accommodated, is above the insulating layer.

5. The apparatus of claim 1 , further comprising:
a substrate below the first electrode.

6. The apparatus of claim 5 , wherein the substrate comprises:
a cavity in at least a portion of a region of the substrate;
wherein the region overlaps the first electrode.

7. The apparatus of claim 5 , wherein the substrate comprises:
a reflective layer in at least a portion of a region of the substrate;
wherein the region overlaps the first electrode.

8. A method of analyzing an active material of a secondary battery, the method comprising:
disposing a first active material in a first through hole of a bulk acoustic resonator, in which a first electrode, a piezoelectric layer, a second electrode, and an insulating layer are sequentially stacked, wherein the first through hole is in the insulating layer to expose a portion of the second electrode;
measuring a resonance frequency of the bulk acoustic resonator by applying an electric signal to the first and second electrodes of the bulk acoustic resonator; and
measuring a weight of the first active material in the first through hole, based on the measured resonance frequency,
wherein the first active material is a positive active material or a negative active material.

9. The method of claim 8 , further comprising:
disposing a second active material apart from the first active material; and
disposing an electrolyte to contact the first and second active materials.

10. The method of claim 9 , further comprising:
detecting electrical and chemical properties of the first active material per unit weight.

11. The method of claim 9 , wherein the second active material has a different charge and discharge potential from the first active material.

12. The method of claim 9 , further comprising:
generating an ultrasound wave by applying an electric signal to the first and second electrodes; and
detecting a bonding property between the second electrode and the first active material by using the generated ultrasound wave.

13. An apparatus for analyzing an active material of a secondary battery, the apparatus comprising:
a first electrode;
a piezoelectric layer on the first electrode;
a second electrode on the piezoelectric layer, the second electrode being configured to provide a voltage having a polarity that is opposite to a polarity of the first electrode;
an insulating layer on the second electrode and comprising a first through hole exposing a portion of the second electrode, and
a chamber layer on the insulating layer, the chamber layer defining an electrolyte accommodating unit in which an electrolyte is accommodated,
wherein a size of the first through hole is smaller than a size of the piezoelectric layer, and
a portion of the electrolyte accommodating unit overlaps the first through hole.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Lee Jooho
• Lee Changseung
• Shim Jeoyoung
• Lee Sunghee
• Jeon Woosung

Classifications

• G01N29/2437

  Piezoelectric probes · CPC title

• G01N2291/2697

  Wafer or (micro)electronic parts · CPC title

• G01N2291/0256

  Adsorption, desorption, surface mass change, e.g. on biosensors · CPC title

• G01N29/12 Primary

  by measuring frequency or resonance of acoustic waves {(measuring frequency or resonant frequency of mechanical vibrations or acoustic waves in general G01H1/06, G01H3/04, G01H13/00; acoustic resonators G10K11/04; vibration or shock testing of structures G01M7/00)} · CPC title