摘要:
A carbon negative electrode material for a lithium secondary battery includes: a core carbon material; and a coated layer covering the core carbon material and comprising a carbon coating material and carbon fiber.
摘要:
Disclosed are an anode material for a secondary battery and a secondary battery using the same. The present invention provides the anode material for a secondary battery, produced by coating a high-crystallinity core carbonaceous material with a coating carbonaceous material and calcining the high-crystallinity core carbonaceous material, wherein the anode material for a secondary battery has a delamination area of 0.1×10−5 to 1.0×10−4 or a volume fraction of water uptake of 0.01 or less. The secondary battery according to the present invention may be useful to improve a charging/discharging capacity and a charging/discharging efficiency of the battery and ensure a stability of the battery since the battery has an improved protection against a degradation reaction of an electrolyte if the battery is produced using the anode material for a secondary battery.
摘要:
A negative active material for a secondary battery includes a core carbon material, and a carbide layer formed on at least a portion of an edge of the core carbon material, and has a specific surface area ratio of 1.6 or less and a sphericity ratio of 0.6 or more when the negative active material is compressed with a pressure of 1.3 ton per 1 cm2 for 2 seconds. A secondary battery manufactured using the negative active material can prevent deterioration of characteristics caused by destruction of the carbide layer and deformation of core carbon material that may occur during a compression process performed to manufacture an electrode for the secondary battery. As a result, the secondary battery can be improved in aspect of a discharging capacity, a cycle efficiency and a discharging capacity retention rate at a long cycle.
摘要:
The present disclosure relates to a sludge collector including: a plurality of flights collecting sludge in a settling basin; a chain connected to the plurality of flights to move the flights; and an attachment-integrated roller unit detachably coupled to an attachment connected to the flights, and preventing the flights from being reversed when the flights are operated.
摘要:
The present invention relates to a negative electrode active material for a lithium secondary battery, a preparation method thereof, and a lithium secondary battery containing the negative electrode active material. The negative electrode active material for the lithium secondary battery according to the present invention is formed by mixing: a carbon material coated with vapor growth carbon fiber (VGCF) and amorphous graphite; and one or more kinds of other carbon material selected from natural graphite, artificial graphite, amorphous-coated graphite, resin-coated graphite and amorphous carbon. According to the present invention, when the negative electrode active material is prepared, the carbon fiber is uniformly dispersed throughout the carbon material, and the carbon material is coated with the amorphous graphite and then mixed with other carbon materials, and thus, a high electrode density can be achieved. Accordingly, even with high electrode density, the invention can provide the negative electrode active material with excellent electrochemical properties such as charge/discharge efficiency and cycle characteristics.
摘要:
Disclosed are an anode material for a secondary battery, a method for producing the same and a secondary battery using the same. The present invention provides the anode material for a secondary battery produced by coating a high-crystallinity core carbonaceous material with a coating carbonaceous material and calcinating the high-crystallinity core carbonaceous material, wherein the anode material has a specific volume of 0.002 cc/g or less. The anode material for a secondary battery of the present invention may be produced by coating a high-crystallinity core carbonaceous material with a coating carbonaceous material and undergoing a predetermined calcination process, and the anode material can have an increased volume ratio of the micropores. Accordingly, the secondary battery of the present invention may be useful to improve charging/discharging capacity and efficiency since sorption of lithium ion in the anode material is improved.
摘要:
The present disclosure relates to a sludge collector including: a plurality of flights collecting sludge in a settling basin; a chain connected to the plurality of flights to move the flights; and an attachment-integrated roller unit detachably coupled to an attachment connected to the flights, and preventing the flights from being reversed when the flights are operated.
摘要:
A carbon negative electrode material for a lithium secondary battery includes: a core carbon material; and a coated layer covering the core carbon material and comprising a carbon coating material and carbon fiber.
摘要:
Disclosed are an anode material for a secondary battery, a secondary battery using the same, a manufacturing method of the anode material for a secondary battery and a secondary battery using the same. The present invention provides an anode material for a secondary battery including an anode active material; and a coating material with which a surface of the anode active material is coated using a mixture of a conductive material and a pitch which is a low-crystallinity carbonaceous material, wherein the conductive material in the coating material is included in a content of 0.2% by weight or more of the anode active material and the low-crystallinity carbonaceous material. According to the present invention, the secondary battery having an excellent electrical property may be provided by preventing a charging/discharging efficiency and a charging/discharging capacity of the battery from being deteriorated, and simultaneously improving conductivity of the electrode.
摘要:
Disclosed are an anode material for a secondary battery, a method for producing the same and a secondary battery using the same. The present invention provides the anode material for a secondary battery produced by coating a high-crystallinity core carbonaceous material with a coating carbonaceous material and calcinating the high-crystallinity core carbonaceous material, wherein the anode material has a specific volume of 0.002 cc/g or less. The anode material for a secondary battery of the present invention may be produced by coating a high-crystallinity core carbonaceous material with a coating carbonaceous material and undergoing a predetermined calcination process, and the anode material can have an increased volume ratio of the micropores. Accordingly, the secondary battery of the present invention may be useful to improve charging/discharging capacity and efficiency since sorption of lithium ion in the anode material is improved.