发明授权
- 专利标题： Negative electrode carbon material for lithium ion secondary battery and manufacturing method thereof
- 专利标题（中）： 锂离子二次电池用负极碳材料及其制造方法
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申请号： US11330395申请日： 2006-01-12
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公开(公告)号： US07981395B2公开(公告)日： 2011-07-19
- 发明人: Shoji Sasaki , Tsuyoshi Temma , Munehiro Kadowaki , Hironori Ozawa , Kazunori Ozawa , Syujun Shikano , Kanji Matsuda
- 申请人： Shoji Sasaki , Tsuyoshi Temma , Munehiro Kadowaki , Hironori Ozawa , Kazunori Ozawa , Syujun Shikano , Kanji Matsuda
- 申请人地址： JP Tokyo
- 专利权人： Enax, Inc.
- 当前专利权人： Enax, Inc.
- 当前专利权人地址： JP Tokyo
- 代理机构： Edwards Angell Palmer & Dodge LLP
- 主分类号： H01M4/13
- IPC分类号： H01M4/13 ; H01M4/02 ; H01M4/62 ; H01M4/58 ; H01M4/60 ; C09C1/56 ; C01B31/00 ; C01B31/02
摘要：
A negative electrode carbon material for a lithium ion secondary battery manufactured by calcinating a rice starch portion obtained by removing the pericarp and tests from unpolished rice and a method for manufacturing the same. The rice starch portion is preferably middle-grade white bran or high-grade white bran each obtained when unpolished rice is polished. The above negative electrode carbon material may have a relatively broad peak at a 2θ of 40 to 50° and a sharp peak at a 2θ of 42 to 44° in its powder X-ray (CuKα) diffraction. According to the present invention, a negative electrode carbon material for a lithium ion secondary battery which has the same quality as the prior art product can be manufactured at a low cost by making effective use of middle-grade white bran or high-grade white bran of rice.
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