Invention Grant
US08741254B2 Method of preparing bundle type silicon nanorod composite through electroless etching process using metal ions and anode active material for lithium secondary cells comprising the same
有权
通过使用金属离子和包含该锂二次电池的负极活性材料的无电蚀刻工艺制备束型硅纳米棒复合材料的方法
- Patent Title: Method of preparing bundle type silicon nanorod composite through electroless etching process using metal ions and anode active material for lithium secondary cells comprising the same
- Patent Title (中): 通过使用金属离子和包含该锂二次电池的负极活性材料的无电蚀刻工艺制备束型硅纳米棒复合材料的方法
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Application No.: US12535216Application Date: 2009-08-04
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Publication No.: US08741254B2Publication Date: 2014-06-03
- Inventor: Joong Kee Lee , Byung Won Cho , Joo Man Woo , Hyung Sun Kim , Kyung Yoon Chung , Won Young Chang , Sang Ok Kim , Sang Eun Park
- Applicant: Joong Kee Lee , Byung Won Cho , Joo Man Woo , Hyung Sun Kim , Kyung Yoon Chung , Won Young Chang , Sang Ok Kim , Sang Eun Park
- Applicant Address: KR Seoul
- Assignee: Korea Institute of Science and Technology
- Current Assignee: Korea Institute of Science and Technology
- Current Assignee Address: KR Seoul
- Agency: Frommer Lawrence & Haug, LLP
- Agent Ronald R. Santucci
- Priority: KR10-2009-0046373 20090527
- Main IPC: C01B33/02
- IPC: C01B33/02
Abstract:
The present invention relates to a method of preparing a porous silicon nanorod structure composed of columnar bundles having a diameter of 50-100 nm and a length of 2-5 μm, and a lithium secondary cell using the porous silicon nanorod structure as an anode active material. The present invention provides a high-capacity and high-efficiency anode active material for lithium secondary cells, which can overcome the low conductivity of silicon and improve the electrode deterioration attributable to volume expansion because it is prepared by electrodepositing the surface of silicon powder with metal and simultaneously etching the silicon powder partially using hydrofluoric acid.
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