ELECTRODE MATERIAL AND USE THEREOF IN LITHIUM ION BATTERIES

摘要

The invention relates to an electrode material for lithium ion batteries, comprising 5-85% by weight of nanoscale silicon particles, which are not aggregated and of which the volume-weighted particle size distribution is between the diameter percentiles d10>20 nm and d90<2000 nm and has a breadth d90-d10<1200 nm; 0-40% by weight of an electrically conductive component containing nanoscale structures with expansions of less than 800 um; 0-80% by weight of graphite particles with a volume-weighted particle size distribution between the diameter percentiles d10>0.2 μm and d90<200 μm; 5-25% by weight of a binding agent; wherein a proportion of graphite particles and electrically conductive components produces in total at least 10% by weight, wherein the proportions of all components produce in total a maximum of 100% by weight.

主权项

1. An electrode material for lithium ion batteries, comprising
5-85% by weight of nanosize silicon particles which have fracture surfaces and a sphericity of 0.3<ψ<0.9 and are not aggregated and whose volume-weighted particle size distribution lies between diameter percentiles d10>20 nm and d90<2000 nm and has a width d90-d10 of <1200 nm; 0-40% by weight of an electrically conductive component comprising nanosize structures having dimensions of less than 800 nm; 0-80% by weight of graphite particles having a volume-weighted particle size distribution between diameter percentiles d10>0.2 μm and d90<200 μm; 5-25% by weight of a binder;wherein a total proportion of graphite particles and electrically conductive component is at least 10% by weight, where proportions of all components add up to a maximum of 100% by weight.