Patents by Inventor Jeng Kuei Chang
Jeng Kuei Chang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11965226Abstract: The present invention relates to a lithium metal powder, a preparing method thereof, and an electrode including the same, wherein the method for preparing the lithium metal powder includes: providing a lithium metal material and a ultrasonication solution; mixing the lithium metal material and the ultrasonication solution to form a mixed solution; and ultrasonically vibrating the mixed solution to form a lithium metal powder, wherein the lithium metal powder is covered by a protective layer, and the aforementioned protective layer includes a protective layer material, wherein the protective layer material includes a sulfide, fluoride, or nitride, or a combination thereof.Type: GrantFiled: October 17, 2022Date of Patent: April 23, 2024Assignee: NATIONAL YANG MING CHIAO TUNG UNIVERSITYInventors: Jeng-Kuei Chang, Si-Hao Chen
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Publication number: 20240068067Abstract: The present invention relates to a lithium metal powder, a preparing method thereof, and an electrode including the same, wherein the method for preparing the lithium metal powder includes: providing a lithium metal material and a ultrasonication solution; mixing the lithium metal material and the ultrasonication solution to form a mixed solution; and ultrasonically vibrating the mixed solution to form a lithium metal powder, wherein the lithium metal powder is covered by a protective layer, and the aforementioned protective layer includes a protective layer material, wherein the protective layer material includes a sulfide, fluoride, or nitride, or a combination thereof.Type: ApplicationFiled: October 17, 2022Publication date: February 29, 2024Inventors: Jeng-Kuei CHANG, Si-Hao CHEN
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Patent number: 11760656Abstract: Provided is a high entropy composite oxide of formula ([M1]pMnqFexCryNiz)3O4 having a spinel crystal, wherein the [M1], p, q, x, y and z are as defined in the specification. A method for producing the high entropy composite oxide, and anode materials including the same are further provided. With the entropy stabilization effect and plenty of oxygen vacancies, the anode materials including the high entropy composite oxide show the advantage of high Li+ transport rate, high electric capacity, redox durability, and good cycling stability, thereby having a bright prospect for application.Type: GrantFiled: March 16, 2021Date of Patent: September 19, 2023Assignee: NATIONAL CHENG KUNG UNIVERSITYInventors: Jyh-Ming Ting, Thi-Xuyen Nguyen, Jeng-Kuei Chang, Jagabandhu Patra
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Publication number: 20230014483Abstract: An electrode for a lithium-ion battery is disclosed, which comprises: a collector comprising a nano-twinned copper foil; and a negative electrode material disposed on the collector, wherein the negative electrode material comprises at least one selected from the group consisting of: silicon, silicon nitride, graphite, graphene, carbon nanotubes, carbon nano-fibers and carbon nano-particles. In addition, a lithium-ion battery comprising the aforesaid electrode is also provided.Type: ApplicationFiled: September 8, 2021Publication date: January 19, 2023Inventors: Chih CHEN, Fu-Chian CHEN, Wei-You HSU, Wen-Wei WU, Jeng-Kuei CHANG
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Publication number: 20220135426Abstract: Provided is a high entropy composite oxide of formula ([M1]pMnqFexCryNiz)3O4 having a spinel crystal, wherein the [M1], p, q, x, y and z are as defined in the specification. A method for producing the high entropy composite oxide, and anode materials including the same are further provided. With the entropy stabilization effect and plenty of oxygen vacancies, the anode materials including the high entropy composite oxide show the advantage of high Li+ transport rate, high electric capacity, redox durability, and good cycling stability, thereby having a bright prospect for application.Type: ApplicationFiled: March 16, 2021Publication date: May 5, 2022Inventors: Jyh-Ming Ting, Thi-Xuyen Nguyen, Jeng-Kuei Chang, Jagabandhu Patra
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Patent number: 10930441Abstract: In this patent, a high energy and power density supercapacitor was invented. A coin cell with supercapacitor includes a spring lamination, a working electrode, a counter electrode, a separator, and an Organic electrolyte. The working and counter electrodes were Activated carbon/N-doping porous graphene/binder coated on Aluminum substrate. The separator was from Nippon Kodoshi Corporation. The Organic electrolyte was 1M TEABF4/PC. The method of producing N-doping porous graphene included the following steps: Step 1: Graphite oxide (GO) was transferred into the furnace. Step 2: Inject 50 c.c./min gas flow of Nitrous oxides for one hour. Step 3: Intensify 40 Celsius degrees/min to 900 Celsius degrees and after holding for one hour, lower the temperature naturally to the room temperature, it can be prepared into N-doping porous graphene. In this patent, the capacitance of the supercapacitor is 122 F/g and the power density is 31 kW/Kg.Type: GrantFiled: February 25, 2019Date of Patent: February 23, 2021Assignee: National Chung-Shan Institute of Science and TechnologyInventors: Chien-Liang Chang, Wu-Ching Hung, Jeng-Kuei Chang, Bo-Rui Pan
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Patent number: 10872735Abstract: A high volumetric energy and power density supercapacitor is provided. This supercapacitor includes a coin cell, a spring lamination, a working electrode, a counter electrode, a separator, and an ionic liquid electrolyte. The working and counter electrodes are N—P doping porous graphene coated on Al substrate. The ionic liquid electrolyte is EMI-FSI. The method of producing N—P doping porous graphene includes following steps: S1: Graphite oxide is quickly transferred into the furnace, which had been held at 300° C. and the porous graphene can be produced. S2: The porous graphene and red phosphorus are put together in the evacuated tube furnace and heated to 700° C. for 1 hr. S3: Heated to 800° C. for 30 min in a mixed argon and ammoniac atmosphere and then the N—P doping porous graphene can be made. The capacitance of the supercapacitor is 105 F/g and the volumetric power density is 1.19 kW/L.Type: GrantFiled: November 28, 2018Date of Patent: December 22, 2020Assignee: National Chung-Shan Institute of Science and TechnologyInventors: Chien-Liang Chang, Wu-Ching Hung, Jeng-Kuei Chang, Bo-Rui Pan
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Publication number: 20200273626Abstract: In this patent, a high energy and power density supercapacitor was invented. A coin cell with supercapacitor includes a spring lamination, a working electrode, a counter electrode, a separator, and an Organic electrolyte. The working and counter electrodes were Activated carbon/N-doping porous graphene/binder coated on Aluminum substrate. The separator was from Nippon Kodoshi Corporation. The Organic electrolyte was 1M TEABF4/PC. The method of producing N-doping porous graphene included the following steps: Step 1: Graphite oxide (GO) was transferred into the furnace. Step 2: Inject 50 c.c./min gas flow of Nitrous oxides for one hour. Step 3: Intensify 40 Celsius degrees/min to 900 Celsius degrees and after holding for one hour, lower the temperature naturally to the room temperature, it can be prepared into N-doping porous graphene. In this patent, the capacitance of the supercapacitor is 122 F/g and the power density is 31 kW/Kg.Type: ApplicationFiled: February 25, 2019Publication date: August 27, 2020Inventors: Chien-Liang Chang, Wu-Ching Hung, Jeng-Kuei Chang, Bo-Rui Pan
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Publication number: 20200043673Abstract: A high volumetric energy and power density supercapacitor is provided. This supercapacitor includes a coin cell, a spring lamination, a working electrode, a counter electrode, a separator, and an ionic liquid electrolyte. The working and counter electrodes are N-P doping porous graphene coated on Al substrate. The ionic liquid electrolyte is EMI-FSI. The method of producing N-P doping porous graphene includes following steps: S1: Graphite oxide is quickly transferred into the furnace, which had been held at 300° C. and the porous graphene can be produced. S2: The porous graphene and red phosphorus are put together in the evacuated tube furnace and heated to 700° C. for 1 hr. S3: Heated to 800° C. for 30 min in a mixed argon and ammoniac atmosphere and then the N-P doping porous graphene can be made. The capacitance of the supercapacitor is 105 F/g and the volumetric power density is 1.19 kW/L.Type: ApplicationFiled: November 28, 2018Publication date: February 6, 2020Inventors: Chien-Liang Chang, Wu-Ching Hung, Jeng-Kuei Chang, Bo-Rui Pan
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Patent number: 9719172Abstract: The present invention relates to a method for treating a metal surface, comprising (A) providing an ionic liquid solution and a substrate of a first metal, wherein the ionic liquid solution comprises an ionic liquid and an ion of a second metal; and (B) immersing the substrate of the first metal in the ionic liquid solution to form a coating layer of the second metal on a surface of the substrate of the first metal by reducing the ion of the second metal. The surface of the substrate of the first metal is protected by the coating layer of the second metal, thereby improving the corrosion resistance.Type: GrantFiled: July 18, 2014Date of Patent: August 1, 2017Assignee: National Central UniversityInventors: Jeng-Kuei Chang, Yi-Chen Wang, Jheng-Yi Lin
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Patent number: 9257235Abstract: An electrochemical capacitor includes a positive electrode, a negative electrode disposed proximally to the positive electrode, and a non-aqueous electrolyte, wherein the positive electrode and the negative electrode are immersed in the non-aqueous electrolyte, and a case is presented in the energy storage system to accommodate the non-aqueous electrolyte, the positive electrode, and the negative electrode. The positive electrode has a porous matrix having a plurality of micrometer sized pores and nanostructured metal oxides, wherein the porous matrix is a 3-dimensional (3D) mesoporous metal or a 3D open-structured carbonaceous material, and the nanostructured metal oxides are coated inside the plurality of pores of the porous matrix.Type: GrantFiled: April 10, 2015Date of Patent: February 9, 2016Assignee: NATIONAL SYNCHROTRON RADIATION RESEARCH CENTERInventors: Ming Jay Deng, Jeng Kuei Chang, Jin Ming Chen, Kueih Tzu Lu
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Publication number: 20150213963Abstract: An electrochemical capacitor includes a positive electrode, a negative electrode disposed proximally to the positive electrode, and a non-aqueous electrolyte, wherein the positive electrode and the negative electrode are immersed in the non-aqueous electrolyte, and a case is presented in the energy storage system to accommodate the non-aqueous electrolyte, the positive electrode, and the negative electrode. The positive electrode has a porous matrix having a plurality of micrometer sized pores and nanostructured metal oxides, wherein the porous matrix is a 3-dimensional (3D) mesoporous metal or a 3D open-structured carbonaceous material, and the nanostructured metal oxides are coated inside the plurality of pores of the porous matrix.Type: ApplicationFiled: April 10, 2015Publication date: July 30, 2015Inventors: MING JAY DENG, JENG KUEI CHANG, JIN MING CHEN, KUEIH TZU LU
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Publication number: 20150203968Abstract: The present invention relates to a method for treating a metal surface, comprising (A) providing an ionic liquid solution and a substrate of a first metal, wherein the ionic liquid solution comprises an ionic liquid and an ion of a second metal; and (B) immersing the substrate of the first metal in the ionic liquid solution to form a coating layer of the second metal on a surface of the substrate of the first metal by reducing the ion of the second metal. The surface of the substrate of the first metal is protected by the coating layer of the second metal, thereby improving the corrosion resistance.Type: ApplicationFiled: July 18, 2014Publication date: July 23, 2015Inventors: Jeng-Kuei CHANG, Yi-Chen WANG, Jheng-Yi LIN
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Publication number: 20150198556Abstract: The present invention relates to a sensing electrode of an enzyme-based sensor, and the enzyme-based sensor comprising the same can be stably stored at room temperature. The sensing electrode comprises: an electrode substrate and an enzyme sensing layer formed thereon, wherein the enzyme sensing layer comprises sequentially laminated layers of: a first carbon material-nano metal layer containing a carbon material and nano-metal particles; an ionic liquid layer comprising an ionic liquid consisting of a cation and an anion; a second carbon material-nano metal layer containing a carbon material and nano-metal particles; and an enzyme layer. The present invention also provides a method for manufacturing the sensing electrode of an enzyme-based sensor.Type: ApplicationFiled: July 16, 2014Publication date: July 16, 2015Inventors: Jeng-Kuei CHANG, Jia-Wun WU, Sheng-Wei LEE, Chueh-Han WANG, Yi-Chen WANG
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Publication number: 20150162634Abstract: The preparation method of electrolytes provided by the present invention involves applications of a first solid oxide powder and a second solid oxide powder, both of which are prepared by using a sol-gel process and a calcination process. Each of the first and second solid oxide powders is a Perovskite-type oxide. After the first and second solid oxide powders are readily mixed, they are compressed into a pellet and then sintered to prepare the afore-mentioned electrolytes for SOFC. It is found in the present invention that by mixing and compressing different solid oxide powders, the solid oxide powder having smaller particle size can fill into the gaps of the other solid oxide powder. After the pellet is sintered, the density of the product is significantly improved.Type: ApplicationFiled: February 13, 2015Publication date: June 11, 2015Inventors: Sheng-Wei LEE, Kan-Rong LEE, Jing-Chie LIN, Chuan LI, Chung-Jen TSENG, Jeng-Kuei CHANG, Shian-Ching JANG, I-Ming HUNG, Chi-Shiung HSI, Sheng-Long LEE, Yen-Jiun CHIANG, Yu-Shuo HUANG
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Patent number: 9030803Abstract: An electrochemical energy storage system includes a positive electrode, a negative electrode disposed proximally to and not in contact with the positive electrode, and a non-aqueous electrolyte, wherein the positive electrode and the negative electrode are immersed in the non-aqueous electrolyte, and a case is presented in the energy storage system to accommodate the non-aqueous electrolyte, the positive electrode, and the negative electrode. The positive electrode has a porous matrix having a plurality of micrometer sized pores and nanostructured metal oxides, wherein the porous matrix is a 3-dimensional (3D) mesoporous metal or a 3D open-structured carbonaceous material, and the nanostructured metal oxides are coated inside the plurality of pores of the porous matrix. The non-aqueous electrolyte includes organic salts having acylamino group and lithium salts characterized as LiX, wherein Li is lithium and X comprises ClO4?, SCN?, PF6?, B(C2O4)2?, N(SO2CF3)2?, CF3SO3?, or the combination thereof.Type: GrantFiled: May 24, 2012Date of Patent: May 12, 2015Assignee: National Synchrotron Radiation Research CenterInventors: Ming Jay Deng, Jeng Kuei Chang, Jin Ming Chen, Kueih Tzu Lu
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Publication number: 20150037694Abstract: The preparation method of electrolytes provided by the present invention includes a first solid oxide powder and a second solid oxide powder, both of which are prepared by using a sol-gel process and a calcination process. Each of the first and second solid oxide powders is a Perovskite-type oxide. After the first and second solid oxide powders are readily mixed, they are compressed into a pellet and then sintered to prepare the afore-mentioned electrolytes for SOFC. It is found in the present invention that by mixing and compressing different solid oxide powders, the solid oxide powder having smaller particle size can fill into the gaps of the other solid oxide powder. After the pellet is sintered, the density of the product is significantly improved.Type: ApplicationFiled: September 20, 2013Publication date: February 5, 2015Applicant: NATIONAL CENTRAL UNIVERSITYInventors: SHENG-WEI LEE, KAN-RONG LEE, JING-CHIE LIN, CHUAN LI, CHUNG-JEN TSENG, JENG-KUEI CHANG, SHIANG-CHING JANG, I-MING HUNG, CHI-SHIUNG HSI, SHENG-LONG LEE, YEN-CHUN CHIANG
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Publication number: 20130163145Abstract: An electrochemical energy storage system includes a positive electrode, a negative electrode disposed proximally to and not in contact with the positive electrode, and a non-aqueous electrolyte, wherein the positive electrode and the negative electrode are immersed in the non-aqueous electrolyte, and a case is presented in the energy storage system to accommodate the non-aqueous electrolyte, the positive electrode, and the negative electrode. The positive electrode has a porous matrix having a plurality of micrometer sized pores and nanostructured metal oxides, wherein the porous matrix is a 3-dimensional (3D) mesoporous metal or a 3D open-structured carbonaceous material, and the nanostructured metal oxides are coated inside the plurality of pores of the porous matrix. The non-aqueous electrolyte includes organic salts having acylamino group and lithium salts characterized as LiX, wherein Li is lithium and X comprises ClO4?, SCN—, PF6?, B(C2O4)2?, N(SO2CF3)2?, CF3SO3?, or the combination thereof.Type: ApplicationFiled: May 24, 2012Publication date: June 27, 2013Inventors: Ming Jay DENG, Jeng Kuei Chang, Jin Ming Chen, Kueih Tzu Lu