Samsung Electronics Co., Ltd.

Seoul National University

Hyosung Tns Inc.

Joonhee Kim

Jungock Park

Mokwon Kim

Kyounghwan Choi

Dongmin Im

Sangbok Ma

Jonghoon Ka

Hyunjin Kim

Hyunpyo Lee

Sungjin Lim

Jae Min Park

Jae Min Cha

Hee Youn Lee

Hyukjae Kwon

Heungchan Lee

Dongjoon Lee

Yeonsu Jung

Minhoo Byeon

Young Shik Cho

Chong Rae Park

A composite cathode active material represented by Li(CoM1)PO(Formula 1) having an olivine structure, wherein a unit-cell volume of the composite cathode active material is in a range of about 283 Åto about 284.6 Å. A cathode including the composite cathode active material, and a secondary battery including the composite cathode active material are also disclosed. In Formula 1, M1 includes i) at least one of Sc, Ti, V, Cr, Cu, or Zn, and optionally at least one of Fe or Ni, and 0.9≤x≤1.1, 0.9≤y≤1.1, and 0<w≤0.3.

Composite cathode active material, method of preparing the same, cathode including the same, and secondary battery including the composite cathode active material

A gas diffusion layer for a metal-air battery, the gas diffusion layer including: a porous layer including non-conductive fiber structures, a conductive carbon layer including a carbon material that is disposed on a surface of a non-conductive fiber structure of the plurality of non-conductive fiber structures.

Gas diffusion layer for metal-air battery, method of manufacturing the same, and metal-air battery including the same

A positive electrode active material includes a lithium-transition metal composite phosphate including a first crystalline phase having a composition represented by Formula 1 and having an olivine structure, and a second crystalline phase having a composition represented by Formula 2 and having a pyrophosphate-containing structure, wherein the second crystalline phase is in an amount of greater than 0 mole percent and not greater than 50 mole percent with respect to a total number of moles of the first crystalline phase and the second crystalline phase, a positive electrode, a secondary battery:LiM1PO  Formula 1LiM2(PO)  Formula 2 In Formulas 1 and 2, 0.9≤x≤1.1, 0.9≤y≤1.1, 5.5≤a≤6.5, and 4.8≤b≤5.2, and M1 and M2 are each independently an element from Groups 3 to 11 in the 4th period of the Periodic Table of the Elements, or a combination thereof.

Composite positive electrode active material, method of preparing the same, positive electrode including the same, and secondary battery including the same

A cathode active material includes a compound represented by Formula 1:Li(CoM)(PO)  Formula 1

Cathode active material, preparation method thereof, cathode including the same, and secondary battery

A gas diffusion layer for a metal-air battery may include a plurality of carbon nanotube thin films that are arranged to be stacked, and the carbon nanotube thin films may include a plurality of first carbon nanotubes arranged in a predetermined direction. The gas diffusion layer for the metal-air battery may include a plurality of carbon nanotube thin films in which a plurality of carbon nanotubes are arranged such that they cross each other by a floating catalyst chemical vapor deposition ('FCCVD') method.

Metal air battery and method of manufacturing gas diffusion layer included in metal air battery

A metal-air battery includes: at least one positive electrode layer, which is configured for using oxygen as an active material and includes a first surface and a second surface opposite the first surface; a gas diffusion layer on the first surface of the positive electrode layer and including a plurality of carbon fibers; an electrolyte layer on the second surface of the positive electrode layer; and a negative electrode metal layer on the electrolyte layer, wherein the positive electrode layer includes a plurality of grooves, and wherein portions of the plurality of carbon fibers are in the grooves.

Gas diffusion layer for metal-air battery, metal-air battery including the gas diffusion layer, and method of manufacturing the metal-air battery

A positive electrode for a metal-air battery, the positive electrode including: a first layer disposed on a surface of an electrolyte membrane or a separator and including a first carbon material, a first electrolyte, and a first binder having an affinity with the first electrolyte; and a second layer disposed on the first layer and including a second carbon material, a second electrolyte, and a second binder having an affinity with the second electrolyte, wherein the first carbon material is different from the second carbon material, the first carbon material has a Brunauer Emmett Teller specific surface area which is greater than a Brunauer Emmett Teller specific surface area of the second carbon material, and wherein an amount of the first binder may be about 1.5 times to about 3 times greater than an amount of the second binder.

Positive electrode for metal-air battery and metal-air battery including the same

An automatic teller machine includes a first interface unit, a second interface unit, a front panel and a control unit. The first interface unit is configured to display financial information for financial transaction to a user. The second interface unit is disposed in a region different from a region in which the first interface unit is disposed. The second interface unit has a plurality of operation parts to be operated by the user. The front panel is movable to a first position in which the operation parts are hidden from the outside of the automatic teller machine and a second position in which the operation parts are exposed to the outside of the automatic teller machine. The control unit is configured to control the front panel so as to be located in one of the first position and the second position.

Automatic teller machine

A metal-air battery includes a gas diffusion layer; a first cathode and a second cathode disposed on opposite surfaces of the gas diffusion layer, respectively; an ion conducting membrane, including a folded portion, surrounding the first cathode, the gas diffusion layer, and the second cathode and disposed on each of the first cathode and the second cathode; and an anode, including a folded portion, surrounding the ion conducting membrane and disposed on the ion conducting membrane, where the folded portion of the anode is folded in a same direction as the folded portion of the ion conducting membrane.

Metal-air battery

Provided is a metal-air battery including a cathode having an air path. The metal-air battery includes a plurality of folded cells stacked in a direction, and each of the folded cells includes: an anode having a U-shape defined by first and second portions separated from and parallel to each other, and a side portion which connects the first and the second portions to each other; an anode protection film arranged on an inner surface of the anode; and a first cathode and a second cathode on the anode protection film, the first cathode and the second cathode arranged facing each other between the first portion and the second portion of the anode. The first cathode and the second cathode each includes a base which contacts the anode protection film, and a plurality of protrusion units extended from the base.

Metal-air battery including cathode with air path

Metal-air batteries include first and second battery stack structures each comprising an anode, an anode electrolyte layer, a cathode, and a gas diffusion layer, and cathode current collectors disposed between the first and second battery stack structures and having a non-flat shape, where the cathodes of the first and second battery stack structures face each other, the cathode current collectors contact the gas diffusion layers of the first and second battery stack structures, at least one of the cathode current collectors includes protrusions, and an empty space between the cathode current collector and the first and second battery stack structures is an air supply unit to supply air to the gas diffusion layer.

A metal air battery includes: at least one gas diffusion layer including a first surface and a second surface facing the first surface; at least one cathode layer disposed on the first surface and on the second surface of the gas diffusion layer and configured to use oxygen as an active material; an electrolyte membrane disposed on the cathode layer; an metal anode layer disposed on the electrolyte membrane; and a cathode current collector including at least one blade, wherein the gas diffusion layer is electrically conductive, and wherein the at least one blade of the cathode current collector contacts and is at least partially embedded in the gas diffusion layer.

Metal air battery and cathode current collector included therein

A metal air battery includes at least one gas diffusion layer assembly; a positive electrode layer disposed on a surface of the at least one gas diffusion layer assembly, wherein the positive electrode layer is capable of using oxygen as an active material; a protective electrolyte membrane disposed on the positive electrode layer; and a negative electrode metal layer disposed on the protective electrolyte membrane, wherein the gas diffusion layer assembly includes a first gas diffusion layer and a second gas diffusion layer, wherein the second gas diffusion layer is disposed on a first surface and an opposite second surface of the first gas diffusion layer, and wherein a gas diffusivity of the first gas diffusion layer is greater than a gas diffusivity of the second gas diffusion layer. Also, the gas diffusion layer assembly described above, and a method of manufacturing a metal air battery including the gas diffusion layer assembly.

Growing community of inventors

Seoul, South Korea

Joonhee Kim