Huawei patents for Lithium-ion battery and its preparation method

Huawei Technologies Co Ltd recently published a patent for “a hard carbon anode material, lithium-ion battery, and its preparation method and application”, with the publication number CN112645300A.

However, the patent abstract shows that the invention discloses a hard carbon anode material, a lithium-ion battery, and a preparation method and application thereof. The hard carbon anode material prepared by the invention is a typical amorphous carbon with a high pyrolysis yield. The lithium-ion battery prepared as an anode material has a high first reversible capacity, good efficiency, stable properties, and consistency.

PREPARATION METHOD:

• The carbon source precursor powder and additives undergo crosslinking reaction to obtain a modified carbon source precursor; the additives include cross-linking agents, modifiers, and dispersion aids.
• After the modified carbon source precursor is sequentially heat-treated, cooled, and mixed with a lithium-rich agent, a modified hard carbon precursor is prepared.
• The modified hard carbon precursor is vacuum carbonized to obtain the hard carbon negative electrode material.

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