Technology for suppressing negative electrode material swelling during charge and discharge

Suppresses the negative electrode swelling during charge and discharge,
greatly improving the cycle characteristics of LiB.

Solution Point

Swelling suppression treatment for spherical natural graphite.
(Achieved actual sales to major battery manufacturers)
Newly developed coating material for carbon coating can be used for existing production lines.

Features 01

Problems that can be solved

Swelling and shrinking of the negative electrode active material during charge and discharge lead to the occurrence of
electrode peeling and isolated particles.
⇒　The swelling control of the active material is important for the improvement of the cycle characteristics.

Features 02

Technology highlight

Suppresses the negative electrode swelling during charge and discharge, greatly improving the cycle characteristics of LiB.

Comparison of electrode swelling and cycle characteristics before
and after charge and discharge cycle

Suppresses the negative electrode swelling caused by swelling and shrinking of the negative electrode active material
during charge and discharge, improving cycle characteristics (capacity retention rate after 500 cycles: approx. 1.5 times).

Links 01