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Negative electrode material for lithium-ion batteries (LiB)

Technology for suppressing negative electrode material
swelling during charge and discharge
(JFE Chemical Corporation)

Manufacturing of high value-added products
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.
Problems that can be solved
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.
Technology highlights
Suppresses the negative electrode swelling during charge and discharge, greatly improving the cycle characteristics of LiB.
Technology highlights



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

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
Collaborating group companies
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Negative electrode material for lithium-ion batteries (LiB)
Technology for suppressing negative electrode material swelling during charge and discharge
(JFE Chemical Corporation)
This technology suppresses the negative electrode swelling during charge and discharge,greatly improving the cycle characteristics of LiB.
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