ELECTRODE WITH PROTECTIVE SUBLAYER TO PREVENT DESTRUCTION OF LITHIUM-ION BATTERIES DURING IGNITION Russian patent published in 2020 - IPC H01M10/525 H01M10/42 H01M4/137 H01M4/60 

FIELD: chemistry.

SUBSTANCE: invention can be used for fabrication of both protective sublayers and electrodes, and accumulators themselves. In the electrode design, a protective sublayer is used, which has thickness from 100 nm to 10 mcm and is made of a polymer of the form:

,

including a main chain and side substitutes, where R is a substitute from group (-H, -(CH₂)_nCH₃, -O(CH₂)_nCH₃, where n is in range from 0 to 12), R₁, R₂, R₃ and R₄ – substitutes from group (-H, -CH₃, -(CH₂)₄-), and M is a transition metal from the group (Ni, Co, Cu, Pd), and the electroactive layer consists of a composite material containing 40 to 95 % active cathode material, 1 to 30 % conductive additive and 1 to 30 % binder.

EFFECT: invention allows improving battery safety.

1 cl, 5 dwg