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chengzhi2103

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[资源] 利用PVDF为碳源制备纳米级Si@C核壳结构负极材料 已有1人参与

Nanosized core/shell silicon@carbon anode material for lithium ion batteries
with polyvinylidene fluoride as carbon source

利用聚偏氟乙烯(PVDF)为碳源制备锂离子电池纳米级Si@C核壳结构负极材料

A nanosized anode material for lithium ion batteries with silicon as core and amorphous carbon as shell was synthesized by dispersing nanosized silicon in polyvinylidene fluoride solution and a subsequent pyrolysis process. The amorphous nature of the carbon in the composite was detected by X-ray
diffraction and Raman spectroscopy. The core/shell structure was further identified by transmission electron microscopy. High reversible capacity and acceptable rate capability were exhibited compared with pristine silicon. The reversible capacity of the silicon@carbon nanocomposite at 50 mA g1 after 30 cycles is 1290 mAh g1 with a capacity retention of 97%. A stable reversible capacity of 450 mAh g1
was delivered even at 1000 mA g1. These improvements are attributed to the amorphous carbon shell, which suppresses the agglomeration of nanosized silicon, reduces the cell impedance, buffers the volume changes and stabilizes the electrode structure during charge/discharge cycles.

fig.3.jpg



fig.5.jpg



fig.4.jpg[ Last edited by chengzhi2103 on 2012-11-21 at 16:35 ]
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suyi865

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小木虫: 金币+0.5, 给个红包,谢谢回帖
好像没什么新意吧
3楼2012-11-21 16:40:40
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chengzhi2103

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我忘传文献了 刚看到已经补传上来了
2楼2012-11-21 16:36:49
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chengzhi2103

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引用回帖:
3楼: Originally posted by suyi865 at 2012-11-21 16:40:40
好像没什么新意吧

呃(⊙o⊙)…你看了啊?反正是属于Si包覆C这类的 碳源很多 研究的也很多
4楼2012-11-21 16:44:44
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简单回复
wangcen5楼
2012-11-21 17:45   回复  
五星好评  顶一下,感谢分享!
2012-11-21 21:11   回复  
五星好评  顶一下,感谢分享!
johnia7楼
2012-11-22 08:06   回复  
五星好评  顶一下,感谢分享!
2012-11-22 08:14   回复  
五星好评  顶一下,感谢分享!
zydp9楼
2012-11-22 08:49   回复  
三星好评  顶一下,感谢分享!
zcm30810楼
2012-11-22 08:53   回复  
五星好评  顶一下,感谢分享!
dcqxinyang11楼
2012-11-22 11:30   回复  
五星好评  顶一下,感谢分享!
sugeng199612楼
2012-11-22 17:06   回复  
五星好评  顶一下,感谢分享!
2012-11-22 18:08   回复  
五星好评  顶一下,感谢分享!
2012-11-23 09:01   回复  
三星好评  顶一下,感谢分享!
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