Sj Materials Co., Ltd.

Ulsan National Institute of Science and Technology

Unist (ulsan National Institute of Science and Technology )

Sin Ho Choi

Soojin Park

Byoung Man Bang

Jaephil Cho

Ji Hyun Yoon

The present invention relates to a method of preparing a porous silicon-based negative electrode active material comprising: mixing a porous silica (SiO) and an aluminum powder; oxidizing all or part of the aluminum powder as an aluminum oxide while at the same time reducing all or part of the porous silica as a porous silicon (Si) by heat-treating a mixture of the porous silica with the aluminum powder, a negative electrode active material, and a rechargeable lithium battery including the same.

Porous silicon based negative electrode active material, method for manufacturing the same, and rechargeable lithium battery including the same

The present invention relates to a method for preparing a silicon-based negative electrode active material, a negative electrode active material for a lithium secondary battery, and a lithium secondary battery comprising the same. More particularly, the method for preparing the silicon-based negative electrode active material comprises: preparing a porous silica (SiO) and a thin metal film; coating the porous silica onto the thin metal film; reducing the porous silica to a porous silicon by performing heat-treatment of the thin metal film and the porous silica; and obtaining the porous silicon.

Method for producing silicon-based negative electrode active material, negative electrode active material for lithium secondary battery, and lithium secondary battery comprising same

Growing community of inventors

Busan, South Korea

Sin Ho Choi