Akihiko Shirakawa

This inventor holds 17 USPTO granted patents and 1 published patent application, plus 1 CIPO patent and 6 EPO patents, primarily in Lithium-Ion Battery Technology. Top assignees: Showa Denko K.k., Showa Denko Kabushiki Kaisha. Active years: 2002-2017.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Akihiko Shirakawa. Retrieved from https://idiyas.com/inventor/akihiko-shirakawa

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 17 (Patent Applications = 1)

% Patents Active = 35.3

CIPO Patents = 1

EPO Patents = 6 (Patent Applications = 1)

Average Co-Inventor Count = 2.3

ph-index = 5

Forward Citations = 62(Granted Patents)

Location History:

Chiba, JP (2002 - 2017)
Tokyo, JP (2014 - 2017)

Company Filing History:

Showa Denko Kabushiki Kaisha

patents

Years Active: 2002-2017

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Areas of Expertise:

Lithium Secondary Battery

Cathode Active Material

Capacitor Element

Complex Oxide Film

Dielectric Material

Piezoelectric Material

Barium Titanate

Production Method

17 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 9745194 - Method of producing cathode active material for lithium secondary battery (2017-08-29),

2. 9590246 - Method for producing lithium metal phosphate (2017-03-07),

3. 8968594 - Production method of positive electrode active material for lithium secondary battery (2015-03-03),

4. 8915974 - Method for manufacturing capacitor element (2014-12-23),

5. 8524324 - Complex oxide film and method for producing same, dielectric material including complex oxide film, piezoelectric material, capacitor, piezoelectric element, and electronic device (2013-09-03),

6. 8486493 - Complex oxide film and method for producing same, composite body and method for producing same, dielectric material, piezoelectric material, capacitor and electronic device (2013-07-16),

7. 8486492 - Complex oxide film and method for producing same, composite body and method for producing same, dielectric material, piezoelectric material, capacitor, piezoelectric element and electronic device (2013-07-16),

8. 8377148 - Method for producing capacitor, capacitor, wiring board, electronic device, and IC card (2013-02-19),

9. 8254082 - Capacitor material, production method of the same, and capacitor, wiring board and electronic device containing that material (2012-08-28),

10. 8052954 - Barium calcium titanate, production process thereof and capacitor (2011-11-08),

11. 7697267 - Capacitor and method for manufacturing same (2010-04-13),

12. 7431911 - Barium titanate and production and process thereof (2008-10-07),

13. 7090822 - Cathode electroactive material, production method therefor and secondary cell (2006-08-15),

14. 6890456 - Cathode electroactive material, production method therefor and secondary cell (2005-05-10),

15. 6699618 - Cathode electroactive material, production method therefor and secondary cell (2004-03-02),

Title: Akihiko Shirakawa: Innovator in Lithium Battery Technology

Introduction

Akihiko Shirakawa is a prominent inventor based in Chiba, Japan, known for his significant contributions to the field of lithium battery technology. With a total of 17 patents to his name, he has made remarkable advancements that enhance the performance and efficiency of lithium secondary batteries.

Latest Patents

One of his latest patents is a method of producing a cathode active material for lithium secondary batteries. This invention provides a way to configure a lithium secondary battery that improves discharge capacity while suppressing the elution of lithium ions from lithium metal phosphate during the washing process. The method involves synthesizing a lithium metal phosphate represented by the composition formula LiMPO, where the element M includes one or more transition metals such as Fe, Mn, Co, and Ni. After synthesis, the lithium metal phosphate is washed with a lithium ion-containing washing liquid.

Another notable patent is a method for producing lithium metal phosphate. This method initiates a conversion reaction of a lithium ion source, a divalent transition metal ion source, and a phosphate ion source in the presence of a polar solvent at temperatures of 150°C or higher. The reaction is facilitated by bringing two solutions containing these ions into contact or by adjusting the pH of a solution containing the ions to 4 or higher.

Career Highlights

Throughout his career, Akihiko Shirakawa has worked with notable companies, including Showa Denko K.K. and Showa Denko Kabushiki Kaisha. His work in these organizations has contributed to the development of innovative technologies in the battery industry.

Collaborations

He has collaborated with esteemed colleagues such as Takao Noda and Joseph Gaze, further enhancing the impact of his research and inventions in the field.

Conclusion

Akihiko Shirakawa's contributions to lithium battery technology through his patents and collaborations have positioned him as a key figure in the advancement of energy storage solutions. His innovative methods continue to influence the development of more efficient and effective lithium secondary batteries.

Profile summary based on public USPTO records.