Carbonaceous material for lithium secondary battery anode active material additive
A negative electrode active material and lithium secondary battery technology, which is applied in the direction of secondary batteries, battery electrodes, active material electrodes, etc., can solve problems such as difficult to achieve large current input characteristics, poor life characteristics, difficult to charge and discharge quickly, etc.
Pending Publication Date: 2020-10-27
AEKYUNG CHEM CO LTD
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Problems solved by technology
[0006] In order to increase the charge-discharge rate, lithium ions need to be quickly adsorbed and desorbed on the negative electrode of the lithium secondary battery, but for graphite, it is difficult to achieve large current input characteristics, so it is difficult to perform rapid charge and discharge, and the life characteristics bad
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[0029] Unless otherwise defined herein, all terms (including technical and scientific terms) used in this specification may have the meaning commonly understood by one of ordinary skill in the art to which this invention belongs. Throughout this specification, unless expressly stated to the contrary, "comprising" any element will be understood to imply the further inclusion of other elements but not the exclusion of any other elements. Additionally, unless expressly stated to the contrary, the singular forms include the plural forms herein.
[0030] Embodiments of the present invention provide a carbonaceous material for a negative electrode active material of a lithium secondary battery, which, when included as an additive in the negative electrode active material of a lithium secondary battery, can realize high-speed lithium secondary battery Excellent output characteristics while maintaining excellent lifetime characteristics.
[0031] According to the carbonaceous materia...
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Abstract
The present invention relates to a carbonaceous material for a lithium secondary battery anode active material additive and provides a carbonaceous material for a lithium secondary battery anode active material additive, the carbonaceous material having a D v50 of 6 [mu]m or less and a D n50 of 1[mu]m or less. When employed in an anode, the carbonaceous material for a lithium secondary battery anode active material additive according to an aspect of the present invention can occlude and release lithium ions at a high rate, whereby a lithium secondary battery comprising same has enhanced outputcharacteristics and is superior in lifespan properties due to a low capacity decrement even upon repeated charging and discharging.
Description
technical field [0001] The present invention relates to a lithium secondary battery, and more particularly, to a carbonaceous material used as a negative electrode active material additive for the lithium secondary battery. Background technique [0002] For commercialization of electric vehicles, research into batteries with higher capacities has been actively conducted to increase the cruising range. [0003] Graphite, which is generally used as an anode active material for lithium secondary batteries, has a low theoretical capacity and, therefore, has a limitation in increasing the cruising range, so active attempts are being made to adopt a new high-capacity anode active material such as silicon-based Negative active material. [0004] However, this research is still not enough for commercialization, and commercialization currently requires a lot of time. [0005] Therefore, in order to accelerate the commercialization of electric vehicles, alternatively, another method...
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IPC IPC(8): H01M4/62H01M4/133H01M10/0525C01B32/05
CPCY02E60/10C01B32/05H01M10/0525H01M2004/027H01M4/587H01M4/133H01M4/364H01M4/625C01P2006/12C01P2002/72C01P2006/40C01B32/90C01P2002/78C01P2004/51
Inventor 李长浩蔡秉睦赵常元李东柱丁粹彬
Owner AEKYUNG CHEM CO LTD