Patents by Inventor Ju-Yup Kim
Ju-Yup Kim 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: 8338729Abstract: A keypad apparatus for an electronic device permits a thinner construction. The keypad apparatus includes a first light guide plate having key buttons molded in one body attached onto the first light guide plate, a second light guide plate disposed under the first light guide plate, a first light source disposed at one side of the first light guide plate, a second light source disposed at one side of the second light guide plate, and key input switches associated with the key buttons.Type: GrantFiled: October 28, 2009Date of Patent: December 25, 2012Assignee: Samsung Electronics Co., Ltd.Inventors: Ji-Young Jung, Tae-Jin Yoon, Yong-Jin Lee, Jin-Hyuk Choi, Ju-Yup Kim
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Patent number: 7883554Abstract: Provided are a lithium secondary battery with suppressed decomposition of an electrolytic solution, and a preparation method thereof. The lithium secondary battery includes a current collector, a cathode and an anode having each active material layer formed on the current collector, and a polymer electrolyte interposed between the cathode and the anode. In the lithium secondary battery, a fluorine resin film is formed on at least one surface of the active material layers of the cathode and the anode. A fluorine resin exists in pores between constituents contained in at least one active material layer of the cathode and the anode. The polymer electrolyte is a polymerized product of a crosslinking monomer and an electrolytic solution including a lithium salt and an organic solvent. Also, a porous membrane made of an insulating resin is interposed between the cathode and the anode.Type: GrantFiled: September 11, 2007Date of Patent: February 8, 2011Assignee: Samsung SDI Co., Ltd.Inventors: Myung-dong Cho, Ju-yup Kim
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Publication number: 20100126836Abstract: A keypad apparatus for an electronic device permits a thinner construction. The keypad apparatus includes a first light guide plate having key buttons molded in one body attached onto the first light guide plate, a second light guide plate disposed under the first light guide plate, a first light source disposed at one side of the first light guide plate, a second light source disposed at one side of the second light guide plate, and key input switches associated with the key buttons.Type: ApplicationFiled: October 28, 2009Publication date: May 27, 2010Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Ji-Young JUNG, Tae-Jin YOON, Yong-Jin LEE, Jin-Hyuk CHOI, Ju-Yup KIM
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Patent number: 7445872Abstract: An organic electrolytic solution containing a lithium salt, an organic solvent, and an oxalate compound, and a lithium battery using the organic electrolytic solution are provided. Due to the oxalate compound, the organic electrolytic solution stabilizes lithium metal and improves the conductivity of lithium ions. Also, the organic electrolytic solution present invention improves charging/discharging efficiency when used in lithium batteries having a lithium metal anode. Especially when the organic electrolytic solution is used in lithium sulfur batteries, the oxalate compound forms a chelate with lithium ions and improves the ionic conductivity and the charging/discharging efficiency of the battery. In addition, due to the chelation of the lithium ions, negative sulfur ions remain free without interaction with lithium ions, are highly likely to dissolve in an electrolytic solution. As a result, a reversible capacity of sulfur is improved.Type: GrantFiled: June 24, 2003Date of Patent: November 4, 2008Assignee: Samsung SDI Co., Ltd.Inventors: Ju-yup Kim, Myung-dong Cho, Young-gyoon Ryu
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Publication number: 20080070116Abstract: Provided are a lithium secondary battery with suppressed decomposition of an electrolytic solution, and a preparation method thereof. The lithium secondary battery includes a current collector, a cathode and an anode having each active material layer formed on the current collector, and a polymer electrolyte interposed between the cathode and the anode. In the lithium secondary battery, a fluorine resin film is formed on at least one surface of the active material layers of the cathode and the anode. A fluorine resin exists in pores between constituents contained in at least one active material layer of the cathode and the anode. The polymer electrolyte is a polymerized product of a crosslinking monomer and an electrolytic solution including a lithium salt and an organic solvent. Also, a porous membrane made of an insulating resin is interposed between the cathode and the anode.Type: ApplicationFiled: September 11, 2007Publication date: March 20, 2008Applicant: Samsung SDI Co., Ltd.Inventors: Myung-dong Cho, Ju-yup Kim
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Patent number: 7312001Abstract: A non-aqueous electrolytic solution and a lithium battery employing the same are provided. The non-aqueous electrolyte solution that contains a substituted or unsubstituted acetate can effectively stabilize lithium metal and improve the conductivity of lithium ions.Type: GrantFiled: September 25, 2003Date of Patent: December 25, 2007Assignee: Samsung SDI Co., Ltd.Inventors: Ju-yup Kim, Myung-dong Cho, Young-gyoon Ryu
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Patent number: 7288339Abstract: Provided are a lithium secondary battery with suppressed decomposition of an electrolytic solution, and a preparation method thereof. The lithium secondary battery includes a current collector, a cathode and an anode having each active material layer formed on the current collector, and a polymer electrolyte interposed between the cathode and the anode. In the lithium secondary battery, a fluorine resin film is formed on at least one surface of the active material layers of the cathode and the anode. A fluorine resin exists in pores between constituents contained in at least one active material layer of the cathode and the anode. The polymer electrolyte is a polymerized product of a crosslinking monomer and an electrolytic solution including a lithium salt and an organic solvent. Also, a porous membrane made of an insulating resin is interposed between the cathode and the anode.Type: GrantFiled: January 21, 2003Date of Patent: October 30, 2007Assignee: Samsung SDI Co., Ltd.Inventors: Myung-dong Cho, Ju-yup Kim
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Patent number: 7244531Abstract: A non-aqueous electrolyte for stabilizing the active surface of a lithium anode and a lithium battery using the non-aqueous electrolyte are provided. The non-aqueous electrolyte contains an organic solvent and a halogenated organic metal salt of formula (1) below: where M is one of Si, Sn, Pb, and Ge; R1 is one of F, Cl, Br, and I; R2 is a substituted or unsubstituted C1-C20 alkyl group or a substituted or unsubstituted phenyl group; and R3 and R4 are independently selected from the group consisting of F, Cl, Br, I, a substituted or unsubstituted C1-C20 alkyl group, and a substituted or unsubstituted phenyl group.Type: GrantFiled: August 1, 2003Date of Patent: July 17, 2007Assignee: Samsung SDI Co., Ltd.Inventors: Han-su Kim, Ju-yup Kim, Seok-soo Lee
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Patent number: 7163767Abstract: Provided is an organic electrolytic solution including a lithium salt and an organic solvent containing an alkoxy-containing compound such as 1,1,3-trimethoxypropane. When polyglyme and an organic compound having dioxolane moiety are further added into the organic electrolytic solution, a lithium metal stabilizing effect and the ionic conductivity of lithium ions are enhanced, and thus, the charging/discharging efficiency of lithium is greatly improved. Such an organic electrolytic solution can be effectively used for any kind of lithium batteries and lithium sulfur batteries, even whose which use a lithium metal anode.Type: GrantFiled: June 2, 2003Date of Patent: January 16, 2007Assignee: Samsung SDI Co., Ltd.Inventors: Ju-yup Kim, Young-gyoon Ryu, Seok-soo Lee, Seung-sik Hwang
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Patent number: 7087349Abstract: An organic electrolytic solution and a lithium secondary battery employing the same, wherein the organic electrolytic solution for a lithium secondary battery includes a polymer adsorbent having an ethylene oxide chain capable of being adsorbed into a lithium metal, a material capable of reacting with lithium to form a lithium alloy, a lithium salt, and an organic solvent. The organic electrolytic solution may be applied to all types of batteries including lithium ion batteries, lithium polymer batteries and lithium metal polymer batteries using a lithium metal for a negative electrode material, and the like. In particular, when the organic electrolytic solution is utilized in a lithium metal polymer battery, it serves to stabilize the lithium metal, and to increase the lithium ionic conductivity, thereby improving the cycle characteristics and charging/discharging efficiency of the battery.Type: GrantFiled: October 30, 2002Date of Patent: August 8, 2006Assignee: Samsung SDI Co., Ltd.Inventors: Ju-yup Kim, Do-young Seung, Young-gyoon Ryu
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Patent number: 7078124Abstract: A positive electrode which has a positive active material layer formed on a conductive substrate and a polymer film coated on the positive active material layer, wherein the positive active material layer includes a positive active material, pores of which are filled with a polymeric material containing a nonaqueous electrolyte, and the polymer film, and the polymer film formed of the polymeric material containing the nonaqueous electrolyte. The polymeric material is formed by polymerization of a composition comprising a monomer and the nonaqueous electrolyte. The monomer includes 1 to 6 functional groups per molecule, and the functional groups are selected from the group consisting of vinyl, allyl, acryl, methacryl and epoxy group.Type: GrantFiled: August 25, 2004Date of Patent: July 18, 2006Assignee: Samsung SDI Co., Ltd.Inventors: Ju-Yup Kim, Myung-Dong Cho, Young-Gyoon Ryu
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Publication number: 20050191556Abstract: The present invention is related to a negative electrode for a lithium secondary battery, a method of manufacturing the same, and a lithium secondary battery containing the negative electrode. In particular, the negative electrode of the present invention has improved initial charge/discharge efficiency, and increased lifespan by limiting the swelling of a lithium alloy-based active material. The negative electrode comprises a negative active material layer, comprising a lithium alloy-based negative active material, formed on a current collector, where the surface of the negative active material layer is coated with a polymer film formed from a solution mixture of a crosslinking monomer with ionic conductivity and low electric conductivity, a polymer support, and an organic solvent, and the negative active material layer includes cavities filled with crosslinking monomers that are cross-linked with one another.Type: ApplicationFiled: December 30, 2004Publication date: September 1, 2005Inventors: Ju-Yup Kim, Han-Su Kim, Myung-Dong Cho
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Publication number: 20050175903Abstract: A positive electrode which has a positive active material layer formed on a conductive substrate and a polymer film coated on the positive active material layer, wherein the positive active material layer includes a positive active material, pores of which are filled with a polymeric material containing a nonaqueous electrolyte, and the polymer film, and the polymer film formed of the polymeric material containing the nonaqueous electrolyte. The polymeric material is formed by polymerization of a composition comprising a monomer and the nonaqueous electrolyte. The monomer includes 1 to 6 functional groups per molecule, and the functional groups are selected from the group consisting of vinyl, allyl, acryl, methacryl and epoxy group.Type: ApplicationFiled: August 25, 2004Publication date: August 11, 2005Inventors: Ju-Yup Kim, Myung-Dong Cho, Young-Gyoon Ryu
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Publication number: 20050106471Abstract: The present invention is related to an organic electrolytic solution comprising a halogenated benzene compound, such as 1-iodobenzene or 1-chlorobenzene. Specifically, the halogenated benzene compound has a high polarity and is capable of reducing the reactivity of the lithium metal surface. Due to these characteristics of the halogenated benzene compound, the lithium ions are unlikely to bond with the sulfide anions. Therefore, the solubility of the sulfide within the electrolyte is increased, thereby improving the charge/discharge efficiency characteristics of the lithium ions and the lifespan of batteries. Moreover, the organic electrolytic solution of the present invention may be used in any battery type where an anode is composed of lithium metal, and in particular, lithium sulfur batteries.Type: ApplicationFiled: October 21, 2004Publication date: May 19, 2005Inventors: Ju-Yup Kim, Han-Soo Kim, Jin-Hwan Park, Seok-Soo Lee
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Publication number: 20050042503Abstract: A lithium-sulfur battery includes a cathode, a lithium metal anode, and a separator interposed between the cathode and the anode. The separator contains less than two fluorine atoms per carbon atom to enable a protective layer to form on a surface of the lithium metal anode. The lithium-sulfur battery forms a uniform and dense LiF protective layer on the surface of the lithium metal and stabilizes the lithium metal during its operation. The lithium-sulfur battery prevents the formation of lithium dendrites and inhibits the decomposition of an electrolytic solution to provide improved cycle characteristics and excellent charging/discharging efficiency. In addition, the lithium-sulfur battery blocks the reaction of polysulfide with the surface of lithium metal to prevent a reduction of the lifetime of the battery.Type: ApplicationFiled: August 20, 2004Publication date: February 24, 2005Inventors: Ju-Yup Kim, Young-Gyoon Ryu
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Publication number: 20040157132Abstract: A lithium sulfur battery including: a cathode that contains sulfur or a sulfur compound as an active material: an anode; a separator interposed between the cathode and the anode; and an organic electrolytic solution that contains a lithium salt, dialkoxypropane having the formula of (CH2)3R1R2, and an organic solvent are provided. The organic electrolytic solution, which contains dialkoxypropane, is less reactive with lithium of the anode and improves the conductivity of lithium ions and the discharging capacity and cycle properties of lithium sulfur batteries.Type: ApplicationFiled: October 29, 2003Publication date: August 12, 2004Applicant: Samsung SDI Co., Ltd.Inventors: Ju-yup Kim, Seok-soo Lee, Young-gyoon Ryu, Myung-dong Cho
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Publication number: 20040096750Abstract: A non-aqueous electrolytic solution and a lithium battery employing the same are provided. The non-aqueous electrolyte solution that contains a substituted or unsubstituted acetate can effectively stabilize lithium metal and improve the conductivity of lithium ions.Type: ApplicationFiled: September 25, 2003Publication date: May 20, 2004Applicant: Samsung SDI Co., Ltd.Inventors: Ju-Yup Kim, Myung-Dong Cho, Young-Gyoon Ryu
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Publication number: 20040096737Abstract: A non-aqueous electrolyte for stabilizing the active surface of a lithium anode and a lithium battery using the non-aqueous electrolyte are provided.Type: ApplicationFiled: August 1, 2003Publication date: May 20, 2004Applicant: Samsung SDI Co., Ltd.Inventors: Han-su Kim, Ju-yup Kim, Seok-soo Lee
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Publication number: 20040096749Abstract: An organic electrolytic solution containing a lithium salt, an organic solvent, and an oxalate compound, and a lithium battery using the organic electrolytic solution are provided. Due to the oxalate compound, the organic electrolytic solution stabilizes lithium metal and improves the conductivity of lithium ions. Also, the organic electrolytic solution present invention improves charging/discharging efficiency when used in lithium batteries having a lithium metal anode. Especially when the organic electrolytic solution is used in lithium sulfur batteries, the oxalate compound forms a chelate with lithium ions and improves the ionic conductivity and the charging/discharging efficiency of the battery. In addition, due to the chelation of the lithium ions, negative sulfur ions remain free without interaction with lithium ions, are highly likely to dissolve in an electrolytic solution. As a result, a reversible capacity of sulfur is improved.Type: ApplicationFiled: June 24, 2003Publication date: May 20, 2004Applicant: Samsung SDI Co., Ltd.Inventors: Ju-Yup Kim, Myung-Dong Cho, Young-Gyoon Ryu
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Publication number: 20040067418Abstract: Provided is an organic electrolytic solution including a lithium salt and an organic solvent containing an alkoxy-containing compound such as 1,1,3-trimethoxypropane. When polyglyme and an organic compound having dioxolane moiety are further added into the organic electrolytic solution, a lithium metal stabilizing effect and the ionic conductivity of lithium ions are enhanced, and thus, the charging/discharging efficiency of lithium is greatly improved. Such an organic electrolytic solution can be effectively used for any kind of lithium batteries and lithium sulfur batteries, even whose which use a lithium metal anode.Type: ApplicationFiled: June 2, 2003Publication date: April 8, 2004Applicant: Samsung SDI Co., Ltd.Inventors: Ju-yup Kim, Young-gyoon Ryu, Seok-soo Lee, Seung-sik Hwang