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小木虫论坛-学术科研互动平台 » 材料区 » 微米和纳米 » 微纳器件 » 戴宏杰小组最新成果——铝离子电池（Nature）
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高慧民

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91楼2015-04-09 14:37:04
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QQ005

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顶一下，感谢分享！
92楼2015-04-09 14:54:21
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tianhao7712
93楼2015-04-09 16:37:24
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starpigeon

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Actually it is only a new kind of supercapacitor, even though they claimed that it was an aluminum ion battery. It is the ionic liquid electrolyte (EMImAlCl4) that reacts with (AlCl4- anions intercalate into) graphite foil under moderate voltage, not Al3+ cations from Al electrode. If the Al electrode is replaced by other stable metal or graphite, the results should be the same. Compared with other real aluminum ion battery (Chem. Commun., 2011, 47, 12610–12612), its specific capacity is too low (60 vs 273 mAh/g). As a supercapacitor, its specific capacitance is only 4A/g*54s/(2.45-0.4V)=105.4 F/g. I can only smile on this "Nature" paper.
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94楼2015-04-09 22:03:40
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sci605

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94楼: Originally posted by starpigeon at 2015-04-09 22:03:40
Actually it is only a new kind of supercapacitor, even though they claimed that it was an aluminum ion battery. It is the ionic liquid electrolyte (EMImAlCl4) that reacts with (AlCl4- anions intercal ...

确实有点水，容量太低
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博学、审问、慎思、明辨、笃行
95楼2015-04-10 10:42:51
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nanobox

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The rechargeable aluminum-ion battery
By:Jayaprakash, N (Jayaprakash, N.) ; Das, SK (Das, S. K.) ; Archer, LA (Archer, L. A.)
CHEMICAL COMMUNICATIONS
Volume: 47  Issue: 47  Pages: 12610-12612
DOI: 10.1039/c1cc15779e
Published: 2011

Abstract
We report a novel aluminium-ion rechargeable battery comprised of an electrolyte containing AlCl(3) in the ionic liquid, 1-ethyl-3-methylimidazolium chloride, and a V(2)O(5) nano-wire cathode against an aluminium metal anode. The battery delivered a discharge capacity of 305 mAh g(-1) in the first cycle and 273 mAh g(-1) after 20 cycles, with very stable electrochemical behaviour.
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96楼2015-04-10 11:24:04
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这世道的无常，注定敢爱的人一生伤
97楼2015-04-10 11:48:49
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98楼2015-04-10 12:10:37
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shdweller

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94楼: Originally posted by starpigeon at 2015-04-09 22:03:40
Actually it is only a new kind of supercapacitor, even though they claimed that it was an aluminum ion battery. It is the ionic liquid electrolyte (EMImAlCl4) that reacts with (AlCl4- anions intercal ...

补充一下：
1. 阳极的铝的氧化产物是AlCl7。因此嵌入到石墨中的AlCl4实际上是来自于电解液。文章里电解液有2mL, 石墨只有3 mg，电解液远远过量。因此电池性能和阳极铝没多大关系。文章也提到了一下，电池的部分能量是存在电解液里的。我认为是一半了。
2. 充放电深度有点低，才～60 mA h g-1。估计都是在表明层发生反应。此即超级电容器特征也。还有，1分钟充完电，那不是电容器是啥？
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99楼2015-04-21 03:00:14
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sz明月天涯
100楼2015-05-02 11:08:08
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