# US 5,346,650 A · Graphite interlaminar compound and method for producing the same

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- Number: US 5,346,650 A
- Document ID: US5346650A
- Status: Granted
- Kind: A
- Application number: 08/107,419
- Filed: 1993-08-16
- Granted: 1994-09-13
- Earliest claimed: 1990-11-02
- Assignees: Alps Electric Co., Ltd.
- Inventors: Osamu Toda; Michio Inagaki; Masahiko Ohhira
- Web page: https://patentgrep.com/patent/US5346650A

## CPC

- H01B 1/04: mainly consisting of carbon-silicon compounds, carbon or silicon
- C01B 32/22: Intercalation
- Y10T 428/30: Self-sustaining carbon mass or layer with impregnant or other layer
- H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K})
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

Graphite intercalation compound interposing at least PbCl.sub.2 interlaminarly among graphite, synthesized by mixing a raw material graphite, PbCl.sub.2, and a metal halide other than PbCl.sub.2 and heating the mixture.

## Claims

### Claim 1

A graphite intercalation compound comprising PbCl.sub.2 and FeCl.sub.3 intercalated into graphite, wherein the molar ratio of Pb to Fe is at least 0.5, and wherein the combined weight of the PbCl.sub.2 and FeCl.sub.3 is at least 40% of the weight of the graphite.

### Claim 2

A method for producing a graphite intercalation compound comprising:
mixing a raw material comprising graphite with PbCl.sub.2 and FeCl.sub.3 to or a mixture, wherein the molar percentage of PbCl.sub.2 is between 40 and 95 percent of the sum of PbCl.sub.2 and FeCl.sub.3, and wherein the weight of the sum of the PbCl.sub.2 and FeCl.sub.3 is at least 40% of the weight of the graphite; and
heating the mixture for a sufficient time at a temperature between 300.degree. C. and 550.degree. C. to intercalate PbCl.sub.2 and FeCl.sub.3 into graphite.

### Claim 3 (depends on 2)

The method of claim 2 in which the molar percentage of PbCl.sub.2 and the temperature are within Region A of FIG. 6.

### Claim 4 (depends on 1)

The graphite intercalation compound of claim 1 wherein the molar ratio is at least 0.24.

### Claim 5 (depends on 1)

The graphite intercalation compound of claim 1 wherein the molar ratio is at least 0.5.