기계적 합금화법에 의한 실리콘계 복합물질의 전지전극특성 (Battery Electrode Characteristics of Si-based Composite by Mechanical Alloying Method)

서지정보

· 발행기관 : 한국분말재료학회
· 수록지 정보 : 한국분말재료학회지 / 16권 / 6호 / 389 ~ 395페이지
· 저자명 : 이철경, 이종호, 이상우

초록

A Si-CuO-graphite composite was prepared by a mechanical alloying (MA) method. The Si-CuO
composite has a mixture structure, where CuO is homogeneously dispersed in Si. Also, Cu2O and Cu3Si phases
were formed during MA and heat treatment. Graphite with the Si-CuO composite was mixed in the same mill for
30 minutes with weight ratio of Si-CuO composite and graphite as 1:1. The Si-CuO composite was homogeneously
covered with graphite. SiC phase was not formed. Electrochemical tests of the composite have been
investigated, and the first charge and discharge capacities of the material were about 870mAh/g and 660mAh/g,
respectively. Those values are about 76% of the first cycle efficiency. The cycle life of the composite showed that
the initial discharge capacity of 660 mAh/g could be maintained up to 92% after 20 cycles.

영어초록

A Si-CuO-graphite composite was prepared by a mechanical alloying (MA) method. The Si-CuO
composite has a mixture structure, where CuO is homogeneously dispersed in Si. Also, Cu2O and Cu3Si phases
were formed during MA and heat treatment. Graphite with the Si-CuO composite was mixed in the same mill for
30 minutes with weight ratio of Si-CuO composite and graphite as 1:1. The Si-CuO composite was homogeneously
covered with graphite. SiC phase was not formed. Electrochemical tests of the composite have been
investigated, and the first charge and discharge capacities of the material were about 870mAh/g and 660mAh/g,
respectively. Those values are about 76% of the first cycle efficiency. The cycle life of the composite showed that
the initial discharge capacity of 660 mAh/g could be maintained up to 92% after 20 cycles.

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