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Researchers Submit Patent Application, “Secondary Battery”, for Approval (USPTO 20200006753)

Source: 
Chemicals & Chemistry Business Daily

2020 JAN 16 (NewsRx) -- By a News Reporter-Staff News Editor at Chemicals & Chemistry Business Daily Business Daily Daily -- From Washington, D.C., NewsRx journalists report that a patent application by the inventors NAKAJIMA, Junji (Aichi, Japan); FUJIWARA, Yoshimasa (Saitama, Japan); DEGAWA, Akimichi (Tokyo, Japan), filed on August 2, 2018, was made available online on January 2, 2020.

The patent’s assignee is Power Iv Inc. (Tokyo, Japan).

News editors obtained the following quote from the background information supplied by the inventors: “In batteries, chemical energy of chemical compounds contained is converted to electric energy via electrochemical oxidation-reduction reactions. In recent years, batteries are widely used worldwide mainly in electronic devices, communication devices, and mobile electronic devices such as computers. Furthermore, batteries are expected to have future practical applications in mobile object, such as electric vehicles etc., and in large-size devices, such as stationary batteries in electric power load leveling systems, etc. Therefore, batteries have become increasingly important key devices.

“Among batteries, a lithium ion secondary battery is currently widely available. The lithium ion secondary battery generally includes a positive electrode that contains lithium-containing transition metal complex oxides as an active material, a negative electrode that contains, as an active material, a material that allows occlusion and release of lithium ions (for example, lithium metal, lithium alloy, metal oxide, or carbon), a non-aqueous electrolytic solution, and a separator (see JP2015-002167A).”

As a supplement to the background information on this patent application, NewsRx correspondents also obtained the inventors’ summary information for this patent application: “However, conventional lithium ion secondary batteries have limitations in power and capacity per unit weight, and there is a demand for a novel secondary battery.

“JP2015-002167A discloses a secondary battery that can achieve high capacity and high power output that could not be achieved by conventional lithium ion secondary batteries. However, in order to commercialize electric vehicles, there is a demand for further improvement of high input and rapid charge performance. In addition, with the secondary battery disclosed in JP2015-002167A, a service life of about 3000 cycles can be ascertained. However, there is a demand for further improvement of the service life performance in order to commercialize electric vehicles and smart grids.

“An object of the present invention is to provide a secondary battery capable of achieving a long service life, high power input/output, and high capacity.

“A secondary battery according to an embodiment of the present invention includes: a first electrode; a second electrode; a separator containing a ceramic material; and an electrolyte, wherein the second electrode contains: a silicon-containing substance having a particle diameter of from 30 to 200 nm; a multilayer graphene; a graphite material; and a binding agent.

“In one embodiment, a weight ratio between the graphite material and the multilayer graphene and a weight ratio between the silicon-containing substance and the multilayer graphene in the second electrode are as follows:

“20.gtoreq.weight of graphite material/weight of multilayer graphene.gtoreq.3

“30.gtoreq.weight of silicon-containing substance/weight of multilayer graphene.gtoreq.4.

“In one embodiment, the electrolyte contains propynyl methanesulfonate.

“In one embodiment, the electrolyte is a solid electrolyte and contains elemental phosphorus and elemental sulfur.

“In one embodiment, the electrolyte has a layer having a perovskite structure.

“In one embodiment, the secondary battery has a mechanism in which an electricity storage mechanism is exhibited as an external force is exerted on a perovskite layer by expansion of the silicon-containing substance during charging of the secondary battery.

“In one embodiment, the first electrode consists of a material containing lithium and nickel.

“Effect of Invention

“According to one embodiment of the present invention, it is possible to provide a secondary battery that is capable of achieving a long service life, high power input/output, and high capacity.”

The claims supplied by the inventors are:

“1. A secondary battery comprising: a first electrode; a second electrode; a separator containing a ceramic material; and an electrolyte, wherein the second electrode contains: a silicon-containing substance having a particle diameter of from 30 to 200 nm; a multilayer graphene; a graphite material; and a binding agent.

“2. The secondary battery according to claim 1, wherein a weight ratio between the graphite material and the multilayer graphene and a weight ratio between the silicon-containing substance and the multilayer graphene in the second electrode are as follows: 20.gtoreq.weight of graphite material/weight of multilayer graphene.gtoreq.3; and 30.gtoreq.weight of silicon-containing substance/weight of multilayer graphene.gtoreq.4.

“3. The secondary battery according to claim 1, wherein the electrolyte contains propynyl methanesulfonate.

“4. The secondary battery according to claim 1, wherein the electrolyte is a solid electrolyte and contains elemental phosphorus and elemental sulfur.

“5. The secondary battery according to claim 1, wherein the electrolyte has a layer having a perovskite structure.

“6. The secondary battery according to claim 5, wherein the layer having the perovskite structure contains elemental lead and elemental iodine.

“7. The secondary battery according to claim 5, further comprising a mechanism in which an electricity storage mechanism is exhibited as an external force is exerted on a perovskite layer by expansion of the silicon-containing substance during charging of the secondary battery.

“8. The secondary battery according to claim 1, wherein the first electrode consists of a material containing lithium and nickel.”

For additional information on this patent application, see: NAKAJIMA, Junji; FUJIWARA, Yoshimasa; DEGAWA, Akimichi. Secondary Battery. Filed August 2, 2018 and posted January 2, 2020. Patent URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PG01&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.html&r=1&f=G&l=50&s1=%2220200006753%22.PGNR.&OS=DN/20200006753&RS=DN/20200006753

 

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