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[資源]
ACS NANO剛出來的具有實際意義的超電電極探討
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先上摘要:Nanoporous nickel hydroxide (Ni(OH)2) thin film was grown on the surface of ultrathin-graphite foam (UGF) via a hydrothermal reaction. The resulting free-standing Ni(OH)2/UGF composite was used as the electrode in a supercapacitor without the need for addition of either binder or metal-based current collector. The highly conductive 3D UGF network facilitates electron transport and the porous Ni(OH)2 thin film structure shortens ion diffusion paths and facilitates the rapid migration of electrolyte ions. An asymmetric supercapacitor was also made and studied with Ni(OH)2/UGF as the positive electrode and activated microwave exfoliated graphite oxide (?a-MEGO?) as the negative electrode. The highest power density of the fully packaged asymmetric cell (44.0 kW/kg) was much higher (2?27 times higher), while the energy density was comparable to or higher, than high-end commercially available supercapacitors. This asymmetric supercapacitor had a capacitance retention of 63.2% after 10000 cycles. 文章一出來后,我仔細(xì)看了,很少看到做超電的文章能發(fā)到這個雜志上,個人感覺亮點在于:1、選擇泡沫石墨做集流體(看引用就知道這個東西很高級,都發(fā)到science上去了),優(yōu)于傳統(tǒng)的泡沫鎳,碳紙以及金屬箔片。2、雖然單位面積上長的活性物質(zhì)少,但計算比容時包括了集流體的質(zhì)量,算出的數(shù)值更可信,也更有實際意義。3、不只單做電極,進行了組裝,使得更有實際意義(不像婁雄文的帶灌水的性質(zhì),為發(fā)文章而發(fā)文章)。對于我們這些跟著牛人走的孩子來說,我要能做出泡沫石墨或者能買到,我就換個體系試試 ,這是小弟我的一點愚見,希望各位高手多多探討一下這篇文章! |
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