Lg Chem, Ltd

Lg Energy Solution, Ltd.

Hanon Systems

Korea Research Institute of Chemical Technology

Korea Atomic Energy Research Institute

King Abdullah City for Atomic and Renewable Energy

Electronics and Telecommunications Research Institute

Gwangju Institute of Science and Technology

Ulsan National Institute of Science and Technology

Toray Industries, Inc.

Toray Battery Separator Film Co., Ltd.

Institute of Chemical Technology

Lg Chemical Co., Ltd.

Unist, Inc.

Seok Koo Kim

Soon Ho Ahn

Sang Young Lee

Hyun Hang Yong

Eun Ju Lee

Jung Don Suk

Je Young Kim

Sei Woon Oh

Jooyong Song

Yong Jun Kim

In Chul Kim

Young In Kim

Yong Sik Kim

Sun Kyu Kim

Ji Eun Lee

Se Mi Park

Youngin Kim

Yongku Kang

Changjin Lee

Chul Haeng Lee

Wang Mo Jung

Sung Jin Kim

Byung Chun Park

Ji Hoon Ryu

Jong Keon Yoon

Dae Soo Kim

Ji Hye Park

Daesung Kwon

Dong Kyu Kim

Yo Han Kwon

Changho Hong

Haeng-Seok Ko

Young Ju Kim

Jingak Jang

Osung Kwon

Su Rim Lee

Jun Min Lee

Yong Ju Lee

Jae Ho Jung

Cha Hun Ku

Jae Hyun Lee

Hyun Min Kim

Hoe Jin Hah

Jung Seok Choi

Hoejin Hah

Han Young Lee

Young Sik Kim

Myung Ki Lee

Young Deok Kim

Jang Hyuk Hong

Ji Won Min

Ju Ri Kim

Boo Yong Um

Seung Hyun Chung

Janis Doelle

Joohyung Moon

Seungyeob Ryu

Seung Sik Won

Soojai Shin

Hyunjun Cho

Bokkyu Choi

Se Wan Ji

Younchang Jeong

Byeong Ha Lee

Jae O Jung

Jung Ah Shim

Soon Hyung Choi

Jung Won Cho

Youngsik Kim

Soon Ju Choi

Chae Ah Kim

Juhyeon Yoon

Youngmin Bae

Hunsik Han

Cheongbong Chang

Junewoo Kee

Minkyu Lee

Eun Ji Kim

Joon Yong Sohn

Chan Young Lee

Jiyoon Kwon

Dae Jong Seo

Hyungi Yoon

Sun Hwak Woo

Kwang Hee Lee

Chul Gi Hong

Cheolhoon Choi

Yeo Kyung Yoon

Mi Won Son

Young Taik Hong

Jin Hyung Lim

Yeon Suk Hong

Juri Kim

Hong Kyu Kang

Bonghyun Cho

Ilhong Kim

Byung Hoon Oh

Kilsung Kwon

Seung Won Park

Jeong Beom Lee

Methods and systems may reliably predict the lifespan characteristics of a lithium secondary battery, for example, the mode of variation in cycle capacity in advance. A method may include a first step of subjecting a lithium secondary battery in a form of a blocking cell to an impedance spectroscopic analysis, a second step of deriving a relationship capacitance for each frequency and a calculating a charge amount, a third step of repeatedly performing the first and second steps, and a fourth step of measuring a capacity for each cycle of the lithium secondary battery and deriving a prediction expression of the capacity for each cycle of the lithium secondary battery.

Method for predicting lifespan characteristics of lithium secondary battery

Provided in one embodiment of the present invention is a solar cell upper electrode which is positioned on a photoactive layer and which includes a conductive polymer layer, wherein ionic liquid comes in contact with the surface of the conductive polymer layer so as to the post-treated, and, due to the post-treatment, an ion-exchange reaction occurs only in the upper area of the conductive upper electrode according to an embodiment of the present invention is not gelated so as to improve electrode performance, and does not oxidize a photoactive layer positioned under the electrode so as to be usable as an upper electrode, and thus can improve the performance of a solar cell to which the electrode is applied.

Solar cell upper electrode and manufacturing method therefor

A secondary battery according to an embodiment of the present disclosure may include an electrode assembly and a pouch-type batter. The battery case may include a cup part to accommodate electrode assembly. A sealing part may extend outward from an edge of the cup part and may be sealed. A venting device may be inserted into the sealing part through which a gas inside the cup part may be discharged to the outside. The sealing part may include a vent sealing portion into which the venting device may be inserted, and a weak sealing portion which may be positioned between the vent sealing portion and the cup part and sealed more weakly than the periphery thereof.

Secondary battery and sealing block

Disclosed is an organic/inorganic composite porous film comprising: (a) inorganic particles; and (b) a binder polymer coating layer formed partially or totally on surfaces of the inorganic particles, wherein the inorganic particles are interconnected among themselves and are fixed by the binder polymer, and interstitial volumes among the inorganic particles form a micropore structure. A method for manufacturing the same film and an electrochemical device including the same film are also disclosed. An electrochemical device comprising the organic/inorganic composite porous film shows improved safety and quality.

Organic/inorganic composite porous film and electrochemical device prepared thereby

A lithium secondary battery includes a positive electrode, a negative electrode, a separator, and an electrolyte, wherein the positive electrode includes a positive electrode active material layer having a positive electrode active material containing an overlithiated manganese-based oxide represented by Formula 1 below, and the negative electrode includes a negative electrode active material layer having a silicon-based negative electrode active material,LiNiCoMnMO  [Formula 1]

Lithium secondary battery

The present invention relates to a method for manufacturing a secondary battery and a secondary battery. The method for manufacturing the secondary battery comprises an accommodation step of accommodating an electrode assembly in an accommodation part of a battery case, a vent membrane mounting step of mounting a vent membrane on a discharge hole, which passes between the inside and outside of the battery case, in the battery case, and a case sealing step of sealing the battery case, wherein the vent membrane allows only a gas to pass through the discharge hole of the battery case, but blocks a liquid.

Method for manufacturing secondary battery and secondary battery

The present disclosure provides a positive electrode for a secondary battery which includes a positive electrode active material and a lithium-based alloy. Also, the present disclosure provides a method of preparing the positive electrode for a secondary battery which includes the steps of forming a positive electrode material mixture layer including a positive electrode active material and forming a coating layer including a lithium-based alloy on the positive electrode material mixture layer, or forming a positive electrode material mixture layer by coating a positive electrode collector with a slurry for forming a positive electrode, which includes a positive electrode active material and a lithium-based alloy, and rolling the positive electrode collector.

Positive electrode for secondary battery, method of preparing the same, and lithium secondary battery including the same

A lithium secondary battery including: a negative electrode; a positive electrode; a separator disposed between the negative electrode and the positive electrode; and an electrolyte, wherein the negative electrode includes SiOx (where 0<x<2) and a carbon-based negative electrode active material, the positive electrode includes a positive electrode active material including a lithium-rich manganese-based oxide in which a manganese content in the total metal except lithium is greater than 50 mol %, and a ratio (Li/Me) of the number of moles of lithium to a total number of moles of metals except lithium is greater than 1, and the depth of using SiOx defined by the disclosed Equation (1) in a state of SOC 0% is 1 to 15, preferably 3 to 15.

A separator comprising a crosslinked polyolefin substrate having a plurality of pores and an inorganic coating layer having internal pores formed on at least one surface of the crosslinked polyolefin substrate. The inorganic coating layer on the at least one surface of the crosslinked polyolefin substrate has internal pores formed by an immersion phase separation method, and a high power secondary battery including the same.

Crosslinked polyolefin separator having inorganic coating layer and high power secondary battery comprising the same

Provided is a positive electrode for a lithium secondary battery, the positive electrode including a positive electrode mixture layer on a positive electrode current collector, wherein the positive electrode mixture layer includes a positive electrode active material and a lithium ion additive, the lithium ion additive is a lithium ion conductive ceramic material represented by Formula 1 below, and the lithium ion conductive ceramic material has a structure in which lithium ions are additionally inserted into vacancy sites of a NASICON-type (Na super ionic conductors-type) structure.LiMM(PO)&#x2003;&#x2003;[Formula 1] In Formula 1, Mis at least one of Ti and Ge, Mis one or more selected from the group consisting Al, Cr, Ga, Fe, Sn, In, Lu, Y, and La, and 0&#x3c;x1&#x2264;0.3, and 1.7&#x2264;y1&#x2264;2.0.

Positive electrode for lithium secondary battery, preparation method thereof, and lithium secondary battery including same

The present invention discloses a method for determining dispersibility, comprising (a) selecting two random points (-') of an electrode material layer, (b) finding a difference &#x394;of an absolute value of two voltage values by measuring voltages between the two points (-&#x2032;) in different current directions, (c) selecting two other random points (-&#x2032; to n-n&#x2032;, where n is an integer that is equal to or greater than 2) that are different from two points selected in the process (a) and, and repeating the processes (a) and (b) at least once to find &#x394;to &#x394;n, (d) finding a mean value of differences &#x394;to &#x394;n of the absolute values obtained by repeating the process (b) and the process (c), and (e) finding a standard deviation of &#x394;to &#x394;n from the mean value.

Method for determining dispersibility of electrode material layer

A method of manufacturing a negative electrode for a secondary battery includes a first step of preparing a lithium metal sheet coated with a lithium metal or to which the lithium metal is adhered in a form of a thin film on a release film and wound into a roll, a second step of laminating the lithium metal sheet to allow the lithium metal to be adjacent to a negative electrode material mixture, to thereby manufacture a negative electrode in which lithium metal is laminated and a third step of applying pressure to the negative electrode. The release film is coated with silicon. The negative electrode manufacturing method uniformly laminates or bonds lithium metal which is difficult to handle on the negative electrode material mixture of the secondary battery and advantageously enhances the speed of the pre-lithiation by using the patterned lithium metal.

Method for manufacturing negative electrode for secondary battery and negative electrode for secondary battery

The present invention relates to a prevention device for loss of coolant accident (LOCA) and a nuclear reactor having the same. The prevention device for LOCA includes a nozzle portion integrally formed in a reactor vessel and having a communication hole communicating with the inside of the reactor vessel, a nozzle finishing portion assembled to the nozzle portion and an injection line for injecting a fluid to the inside of the reactor vessel respectively on both sides thereof in a communicating manner, and a check valve mounting portion installed to be embedded inside the nozzle portion and having at least one check valve opened by flow such that the fluid is injected into the reactor vessel, wherein the check valve blocks outflow of a reactor coolant from the reactor vessel in case of failure of the injection line.

Prevention device for LOCA and nuclear reactor having the same

A battery cell includes a positive electrode, a negative electrode, and a separation film provided between the positive electrode and the negative electrode. A variation ratio of thickness of a battery cell before a pressurizing jig is disconnected and after the pressurizing jig is disconnected is equal to or less than 0.009, and the variation ratio of thickness of a battery cell is defied by a value generated by dividing a variation value of thickness that is a difference between the thickness of a battery cell after the pressurizing jig is disconnected and the thickness of a battery cell before the pressurizing jig is disconnected by the thickness of a battery cell before the pressurizing jig is disconnected.

Battery cell, secondary battery, and method of manufacturing battery cell

The present invention provides a single electrode assembly, in which a plurality of negative electrodes and positive electrodes are stacked alternately and repeatedly, and separators are disposed between the plurality of negative electrodes and positive electrodes, the electrode assembly including: a negative electrode tab part formed on one end of the electrode assembly and extending from the plurality of negative electrodes; a positive electrode bus bar spaced apart from the negative electrode tab part on the one end of the electrode assembly and electrically connecting the plurality of the positive electrodes; a positive electrode tab part formed on the other end of the electrode assembly opposite to the one end and extending from the plurality of positive electrodes; and a negative electrode bus bar spaced apart from the positive electrode tab part on the other end of the electrode assembly and electrically connecting the plurality of the negative electrodes.

Electrode assembly and method for manufacturing the same

Growing community of inventors

Daejeon, South Korea

Seok Koo Kim