Abstract: The present invention relates to a negative electrode active material for a secondary battery, including: a Si main phase formed of crystalline Si; and a matrix coexisting with the Si main phase, in which at least a part of the matrix has a crystal lattice parameter which is any one among n times, 1/n time, n?2 times, n/?2 times, and n?5 times of a crystal lattice parameter of the Si main phase (n is an integer).

Abstract: Provided are a negative electrode active material for a secondary battery, in which a silicon-based negative electrode active material is formed in a three-layer structure including an amorphous matrix, thereby suppressing a dispersal phenomenon of the negative electrode active material during charging/discharging. The negative electrode active material having a three-layer structure includes: a silicon (Si) layer; an amorphous matrix layer outside the Si layer; and a nano grain matrix layer formed on an interface between the Si layer and the amorphous matrix layer.

Abstract: Disclosed is a continuous rapid solidification apparatus, which includes a cooling roll configured to cool a molten metal supplied to an outer circumference surface thereof; a crucible configured to supply the cooling roll with the molten metal; and two or more molten metal supplies configured to melt raw material metal and alternately supply the crucible with the molten metal.

Abstract: Disclosed is a continuous rapid solidification apparatus, which has a cooling roll configured to cool a molten metal supplied to an outer circumference surface thereof; a crucible configured to supply the cooling roll with the molten metal; a molten metal supply configured to melt a raw material metal and supply the crucible with the molten metal; a first chamber configured to form a sealed space where the molten metal supplied from the crucible is cooled by the cooling roll; and a second chamber configured to be formed of a space separated from the first chamber and to form a sealed space where the molten metal is supplied to the crucible by the molten metal supply.

Abstract: Disclosed is a negative active material having a reduced volume change during charge/discharge. A fine crystalline region exists on a matrix of an alloy, and lithium is easily dispersed due to the fine crystalline region. In the negative active material, a ratio of the fine crystalline region is represented by an amorphization degree, and is optimized in designing a battery through a measurement of an expansion rate after 50 cycles. The negative active material is used for a secondary battery and includes an alloy formed by a chemical formula below: (a ratio of Ti to Fe is 1:1 and a ratio of Si:Ti or Si:Fe has a range of 5:1 to 9:1.) Si—?xTiyFezAlu where x, y, z, and u are at %, x: 1?(y+z+u), y: 0.09 to 0.14, z: 0.09 to 0.14, and u: larger than 0.01 and less than 0.2.

Abstract: The present invention relates to a negative active material for a secondary battery, the anode active material comprising: an Si main phase including crystalline Si; and a matrix coexisting with the Si main phase, wherein at least a part of the matrix has a crystal lattice parameter which is one among n times, 1/n times, n?2 times, n/?2 times, and n?5 times (n is an integer) that of the Si main phase.

Abstract: The present disclosure is to provide a negative electrode for a lithium secondary battery having high negative electrode efficiency and excellent capacity retention, and a lithium secondary battery including the negative electrode. In one aspect, there is provided a negative electrode for a lithium secondary battery, wherein the electrode contains 3 to 9% by weight of a silicon-based negative-electrode active material having a following composition formula (1); and 87.5 to 95.5% by weight of a graphite-based negative-electrode active material: SixTiyFezAlu??(1) where x, y, z and u are atomic %, x: 1?(y+z+u), y: 0.09 to 0.14, z: 0.09 to 0.14, u: 0.01 exclusive to 0.2 exclusive.

Abstract: A negative electrode active material for a lithium secondary battery according to an exemplary embodiment of the present invention includes an alloy containing silicon (Si), titanium (Ti), and iron (Fe), wherein the degree of amorphization of the alloy is raised by 40% or more by further adding copper (Cu) to the alloy.

Abstract: Disclosed is a negative active material, which has a small change in a volume during charge/discharge, has enhanced initial efficiency and capacity maintenance characteristics. A fine crystalline region exists on a matrix of an alloy, and lithium is more easily dispersed due to the fine crystalline region. The negative active material for a secondary battery has an improved expansion rate, and is formed by a formula below, and its expansion rate after 50 cycles is 70 to 150%, and an amorphization degree on a matrix within an alloy has a range of 25% or more, and Si has a range of 60 to 70%, Ti has a range of 9 to 14%, Fe has a range of 9 to 14%, and Al has a range larger than 1% and less than 20%.

Abstract: The present disclosure is to provide a negative electrode for a lithium secondary battery having high negative electrode efficiency and excellent capacity retention, and a lithium secondary battery including the negative electrode. In one aspect, there is provided a negative electrode for a lithium secondary battery, wherein the electrode contains 3 to 9% by weight of a silicon-based negative-electrode active material having a following composition formula (1); and 87.5 to 95.5% by weight of a graphite-based negative-electrode active material: SixTiyFezAlu??(i) where x, y, z and u are atomic %, x: 1?(y+z+u), y: 0.09 to 0.14, z: 0.09 to 0.14, u: 0.01 exclusive to 0.2 exclusive.

Abstract: Disclosed is a negative active material having a reduced volume change during charge/discharge. A fine crystalline region exists on a matrix of an alloy, and lithium is easily dispersed due to the fine crystalline region. In the negative active material, a ratio of the fine crystalline region is represented by an amorphization degree, and is optimized in designing a battery through a measurement of an expansion rate after 50 cycles. The negative active material is used for a secondary battery and includes an alloy formed by a chemical formula below: (a ratio of Ti to Fe is 1:1 and a ratio of Si:Ti or Si:Fe has a range of 5:1 to 9:1.) Si—?xTiyFezAlu where x, y, z, and u are at %, x: 1?(y+z+u), y: 0.09 to 0.14, z: 0.09 to 0.14, and u: larger than 0.01 and less than 0.2.

Abstract: Disclosed is a continuous rapid solidification apparatus, which comprises a cooling roll configured to cool a molten metal supplied to an outer circumference surface thereof; a crucible configured to supply the cooling roll with the molten metal; and two or more molten metal supplies configured to melt raw material metal and sequentially supply the crucible with the molten metal.

Abstract: Disclosed is a continuous rapid solidification apparatus, which comprises a cooling roll configured to cool a molten metal supplied to an outer circumference surface thereof; a crucible configured to supply the cooling roll with the molten metal; a molten metal supply configured to melt a raw material metal and supply the crucible with the molten metal; a first chamber configured to form a sealed space where the molten metal supplied from the crucible is cooled by the cooling roll; and a second chamber configured to be formed of a space separated from the first chamber and to form a sealed space where the molten metal is supplied to the crucible by the molten metal supply.

Abstract: The present invention provides a negative active material for a secondary battery with an improved expansion rate, which is formed by a formula below, and in which an expansion rate of the negative active material after 50 cycles is 70 to 150%, and an amorphization degree on a matrix within an alloy has a range of 25% or more, and Si has a range of 60 to 70%, Ti has a range of 9 to 14%, Fe has a range of 9 to 14%, and Al has a range larger than 1% and less than 20%. Formula: SixTiyFezAlu (x, y, z, and u are at %, x: 1?(y+z+u)).

Abstract: A negative electrode active material for a lithium secondary battery according to an exemplary embodiment of the present invention includes an alloy including silicon (Si), copper (cu), and aluminum (Al) of 40 to 70 at %, wherein the ratio of aluminum (Al) to copper (Cu) included in the alloy is substantailly 10:90 to 30:70, and the alloy further includes iron (Fe), and further includes zirconium (Zr) or titanium (Ti).

Abstract: A negative plate for a lithium secondary battery according to an exemplary embodiment of the present invention includes: a negative active material including a silicon (Si) alloy; a binder; and a single-walled carbon nano tube (SWCNT) dispersion liquid, the ratio of the SWCNT dispersion liquid to the silicon (Si) alloy included in the negative plate for the lithium secondary battery is 800:3 to 20:1.

Abstract: A negative electrode active material for a lithium secondary battery according to an exemplary embodiment of the present invention includes an alloy containing silicon (Si), titanium (Ti), and iron (Fe), wherein the degree of amorphization of the alloy is raised by 40% or more by further adding copper (Cu) to the alloy.

Abstract: A negative electrode active material for a lithium secondary battery according to an exemplary embodiment of the present invention includes: silicon (Si) of 40 to 60 at %; and an alloy including copper (Cu) and aluminum (Al), in which a ratio of the aluminum (Al) to the copper (Cu) included in the alloy is 30:70 to 65:35, and the silicon (Si) does not substantially form an intermetallic compound within the alloy.

Abstract: Disclosed is a furnace transformer, which is capable of preventing induction heating by using an integrated insulating plate and paramagnetic shield plate. The furnace transformer, in which bushings of a plurality of phases is drawn out to the outside, includes an insulating plate configuring a partial surface of an external side of the furnace transformer, and all of the bushings of the plurality of phases are installed while passing through the insulating plate. According to the furnace transformer according to the present invention may maximally suppress induction heating generated on a surface of a tank adjacent to a secondary side and minimize an overall size of the furnace transformer.

Abstract: The present invention provides a negative active material for a secondary battery with an improved expansion rate, which is formed by a formula below, and in which an expansion rate of the negative active material after 50 cycles is 70 to 150%, and an amorphization degree on a matrix within an alloy has a range of 25% or more, and Si has a range of 60 to 70%, Ti has a range of 9 to 14%, Fe has a range of 9 to 14%, and Al has a range larger than 1% and less than 20%.