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北京石油化工学院2026年研究生招生接收调剂公告
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莫木

至尊木虫 (著名写手)

[交流] 交流In situ atomic-scale imaging of electrochemical lithiation in silicon 已有2人参与

In situ atomic-scale imaging of electrochemical lithiation in silicon


In lithium-ion batteries, the electrochemical reaction between the electrodes and lithium is a critical process that controls the capacity, cyclability and reliability of the battery. Despite intensive study, the atomistic mechanism of the electrochemical reactions occurring in these solid-state electrodes remains unclear. Here, we show that in situ transmission electron microscopy can be used to study the dynamic lithiation process of single-crystal silicon with atomic resolution. We observe a sharp interface (~1 nm thick) between the crystalline silicon and an amorphous LixSi alloy. The lithiation kinetics are controlled by the migration of the interface, which occurs through a ledge mechanism involving the lateral movement of ledges on the close-packed {111} atomic planes. Such ledge flow processes produce the amorphous LixSi alloy through layer-by-layer peeling of the {111} atomic facets, resulting in the orientation-dependent mobility of the interfaces.[ Last edited by zlin on 2012-11-7 at 16:48 ]
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莫木

至尊木虫 (著名写手)

引用回帖:
6楼: Originally posted by 黄磊314 at 2012-11-08 21:01:26
看不到啊

http://muchong.com/bbs/viewthread.php?tid=5154310
7楼2012-11-08 21:15:43
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0.8

顶一下,感谢分享!
3楼2012-11-07 08:25:35
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0.8

顶一下,感谢分享!
4楼2012-11-07 09:17:06
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Rainycc

木虫 (著名写手)


小木虫: 金币+0.5, 给个红包,谢谢回帖
技术原理很简单,但是操作的技巧非常难,对设备要求非常高
5楼2012-11-08 01:00:44
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