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jimmywhite419

银虫 (小有名气)

[交流] Nature com.上新出的锂硫电池文章,跟大家讨论分享一下 已有8人参与

Nature com.上新出的锂硫电池文章,跟大家讨论分享一下:
http://www.nature.com/ncomms/201 ... ull/ncomms9622.html

Encapsulation of sulfur with thin-layered nickel-based hydroxides for long-cyclic lithium–sulfur cells
Abstract:Elemental sulfur cathodes for lithium/sulfur cells are still in the stage of intensive research
due to their unsatisfactory capacity retention and cyclability. The undesired capacity
degradation upon cycling originates from gradual diffusion of lithium polysulfides out of the
cathode region. To prevent losses of certain intermediate soluble species and extend lifespan
of cells, the effective encapsulation of sulfur plays a critical role. Here we report an applicable
way, by using thin-layered nickel-based hydroxide as a feasible and effective encapsulation
material. In addition to being a durable physical barrier, such hydroxide thin films can
irreversibly react with lithium to generate protective layers that combine good ionic
permeability and abundant functional polar/hydrophilic groups, leading to drastic improvements
in cell behaviours (almost 100% coulombic efficiency and negligible capacity decay
within total 500 cycles). Our present encapsulation strategy and understanding of hydroxide
working mechanisms may advance progress on the development of lithium/sulfur cells for
practical use.

Nature com.上新出的锂硫电池文章,跟大家讨论分享一下
QQ图片20151017104712.png
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magicpopo

金虫 (著名写手)

电之炼金术士


小木虫: 金币+0.5, 给个红包,谢谢回帖
图3的a图,图4的b图
做过锂硫的简单算一下
3楼2015-10-17 14:33:25
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jimmywhite419

银虫 (小有名气)

引用回帖:
2楼: Originally posted by fdbxlq at 2015-10-17 14:15:21
讨论什么?

话说氢氧化物做壳层材料,用于锂电池电池体系是否合适?

[ 发自手机版 http://muchong.com/3g ]
4楼2015-10-17 16:08:38
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foolishmani

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感觉文章新意和数据都没有我最近的AEM好!NiOH不是典型的电容材料么?
5楼2015-10-18 08:03:22
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jimmywhite419

银虫 (小有名气)

引用回帖:
5楼: Originally posted by foolishmani at 2015-10-18 08:03:22
感觉文章新意和数据都没有我最近的AEM好!NiOH不是典型的电容材料么?

就是看到用氢氧化镍用来做这个,所以觉得很好奇。文章里面貌似说了一些原理,但是不完全明白
6楼2015-10-18 13:14:52
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