摘要:
The present invention relates to a manufacturing method of a lithium-titanium composite oxide doped with two kinds of different metals and a lithium-titanium composite oxide doped with two kinds of different metals. More particularly, the present invention relates to a manufacturing method of a lithium-titanium composite oxide doped with different metals, solid-phase mixing after adjusting a mixing ratio of two kinds of different metals and pulverizing the same, and spray drying the same to adjust contents of impurities, and a lithium-titanium composite oxide doped with different metals manufactured therefrom. By doping two kinds of different metals on the surface of the lithium-titanium composite oxide of the present invention after adjusting the ratio of the two different metals to be a desirable ratio, the present invention reduces the contents of rutile-type titanium dioxide, anatase-type titanium dioxide and Li 2 TiO 3 which have been included as impurities in the prior arts, thereby manufacturing titanium dioxide having excellent capacity characteristics and structural characteristics, and a battery including the titanium dioxide having excellent battery characteristics of high initial charge and discharge efficiency and rate capability.
摘要:
An optical semiconductor lighting apparatus with enhanced heat dissipating efficiency and dust-proof efficiency is disclosed. The optical semiconductor lighting apparatus comprises a housing which is open at a side thereof, a light source module disposed in the housing and having at least of a light source, a fan disposed adjacent to the light source module and blowing air to the light source module, and a reflector reflecting the light generated from the light source module to determine an illumination scope of the light. In the housing, a moving path discharging, through the light source module, at least a portion of the air drawn by the fan is formed. Since at least a portion of the air blown to the light source module by the fan is discharged through the moving path inside the housing, thus, external dusts can be prevented from moving toward the light source module.
摘要:
The present invention relates to a positive active material for lithium secondary battery, its manufacturing method, and lithium secondary battery including the same, and it provides that a positive active material for lithium secondary battery, comprising: a core and a coating layer, wherein, the core is lithium metal oxide, the coating layer comprises boron, the boron compound in the coating layer comprises a lithium boron oxide and a boron oxide, the lithium boron oxide is included 70 wt% or more and 99 wt% in the entire coating layer, the lithium boron oxide comprises Li 2 B 4 O 7 , with respect to the lithium boron oxide 100wt%, the content of Li 2 B 4 O 7 is 55 wt% or more and 99 wt% or less.
摘要:
Provided is a reduction furnace reducing ore containing an iron oxide component, and including a charge feeding port 110 having a charge material introduced therethrough and a reducing gas intake port 170 having reducing gas injected therethrough, wherein the charge feeding port 110 is formed in an upper portion thereof and the reducing gas intake port 170 is installed in a bottom portion thereof. According to the present invention, since the reducing gas may be injected into the center of a lower portion of the reduction furnace, the reducing gas may be allowed to be uniformly distributed in the reduction furnace, and thus, a reduction rate of the charge material may be increased and reduction rates between particles of the charge material may be uniformized.
摘要:
Provided is a reduction furnace reducing ore containing an iron oxide component, and including a charge feeding port 110 having a charge material introduced therethrough and a reducing gas intake port 170 having reducing gas injected therethrough, wherein the charge feeding port 110 is formed in an upper portion thereof and the reducing gas intake port 170 is installed in a bottom portion thereof. According to the present invention, since the reducing gas may be injected into the center of a lower portion of the reduction furnace, the reducing gas may be allowed to be uniformly distributed in the reduction furnace, and thus, a reduction rate of the charge material may be increased and reduction rates between particles of the charge material may be uniformized.
摘要:
Presented is a method for producing a negative electrode active material which has a high discharge capacity, high charge-discharge efficiency, and excellent high-output characteristics, and which experiences only a small volume change during charging/discharging. A method for producing a negative electrode active material for a lithium secondary battery according to an embodiment of the present invention includes: a step for producing primary particles by pulverizing a carbon raw material containing 4 to 10 wt% of volatile matters; a step for producing secondary particles by mixing the primary particles with a binder; and a step for producing a graphite material by graphitizing the secondary particles.
摘要:
Provided is a reduction furnace reducing ore containing an iron oxide component, and including a charge feeding port 110 having a charge material introduced therethrough and a reducing gas intake port 170 having reducing gas injected therethrough, wherein the charge feeding port 110 is formed in an upper portion thereof and the reducing gas intake port 170 is installed in a bottom portion thereof. According to the present invention, since the reducing gas may be injected into the center of a lower portion of the reduction furnace, the reducing gas may be allowed to be uniformly distributed in the reduction furnace, and thus, a reduction rate of the charge material may be increased and reduction rates between particles of the charge material may be uniformized.
摘要:
Provided is a traffic class of an IEEE 802.16/WiBro system. The unsolicited grant service (UGS) scheduling method with regard to a subscriber station (SS) and a base station (BS) that are disposed in a network wherein an IEEE 802.16/WiBro system is realized, the method includes: when the SS requires 1 through M (where M is a positive integer) UGS flows, and the BS serves 1 through N (where N is a positive integer) frames, the BS storing grant periods and guaranteed sizes that are granted to the M UGS flows in each N frame; and the BS comparing service capacity of a frame and a sum of guaranteed sizes of each flow belonging to the N frames, and determining if an overload occurs.
摘要:
There is provided a method of switching a zone through which services are provided to subscriber stations (SS) in an environment using an FRF-1 zone and an FRF-3 zone based on traffic load of each zone in order to reduce the inter-cell interference in 802.16/WiBro systems. The service zone switching method based on load considering inter-cell interference in 802.16/WiBro systems may be useful to minimize the inter-cell interference, enhance the capacity of cells and improve users' transmission quality in the cells by determining whether the services are provided through one out of an FRF-1 zone (a zone where users in 3 sectors of one cell can use all subchannels) and an FRF-3 zone (a zone where users in each of 3 sectors of one cell can use one third of all subchannels; 3 sectors of one cell use 3 channel group, respectively), which are present in one frame, based on the distribution and traffic load of subscriber stations (SS) present in one cell, which consists of 3 sector units, under the environment of the 802.16/WiBro systems, and providing services through the selected zone.
摘要:
Provided is a bi-directional service flow management method in a wideband wireless connection communication system, and more particularly, a method of performing a bi-directional flow establishment. The method of providing a flow service in an IEEE 802.16/WiBro includes: generating a revised dynamic service addition (DSA) related message in which an area for designating bidirectional flow management information is allocated from a standard DSA related message; and performing a bidirectional flow initialization process between a subscriber station (SS) and a base station (BS) via single control message negotiation based on the revised DSA related message.