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lhongl2008

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[资源] JPS上最新Li-S文章

The lithium/sulfur battery is a very promising technology for high energy applications. Among other advantages, this electrochemical system has a high theoretical specific capacity of 1675 mAh/g, but suffers from several drawbacks: poor elemental sulfur conductivity, active material dissolution and use of the highly reactive lithium metal electrode. More particularly, the discharge capacity is known to be dictated by the short lithium polysulfide precipitation. These poorly soluble and highly insulating species are produced at the end of discharge, and are responsible for the positive electrode passivation and the early end of discharge. Nevertheless, the discharge capacity can be improved by working on the positive
electrode specific surface area and morphology, as well as on the electrolyte composition. In this paper, we focused on the positive electrode issue. To this purpose, various current collector structures have been tested in order to achieve a high positive electrode surface area and a stable morphology during cycling. We demonstrated that the discharge capacity could be increased up to 1400 mAh/g
thanks to the use of carbon foam. As well, the capacity fading could be dramatically decreased in comparison with the one obtained for conventional sulfur composite electrodes.






[ 来自科研家族 锂电池世界 ][ Last edited by lhongl2008 on 2012-4-27 at 15:57 ]
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kielwochen

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★★★★★ 五星级,优秀推荐

有锂有硫,没有最牛,只有更硫! 感谢分享!
6楼2012-04-27 20:51:23
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lhongl2008

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下载后请回帖,好资源大家分享。回帖是一种美德,也许你不差那一个金币。

[ Last edited by lhongl2008 on 2012-4-27 at 16:06 ]
2楼2012-04-27 15:55:28
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lhongl2008

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引用回帖:
8楼: Originally posted by chichung at 2012-04-27 22:42:34:
回帖有金币拿吗?

不在乎这几个金币
13楼2012-04-28 09:27:01
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简单回复
2012-04-27 19:54   回复  
五星好评  顶一下,感谢分享!
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三星好评  顶一下,感谢分享!
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