Lithium ion cell for a secondary battery
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United States of America Patent
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Dec 29, 2020
Grant Date -
Apr 21, 2016
app pub date -
Jun 10, 2014
filing date -
Jun 12, 2013
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Abstract
Known lithium-ion cells for a secondary battery including an electrode have an active material layer containing active material particles in contact with a non-aqueous electrolyte and a particulate, porous additive. Using this as a basis, it is desired to achieve an improvement in the lithium-ion cells in respect of their gravimetric and volumetric energy density and in respect of inexpensive and reproducible production, and in particular to ensure that the desired properties of the active material layer are not changed, or are not changed to an unacceptable degree, by compression during calendering. Accordingly, it is proposed to use, as an additive, porous carbon particles having a porosity in the range between 50% and 95% and having macropores which are fluidically connected to one another and which are delimited by carbon walls having an average wall thickness in the range of 5 to 500 nm.
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