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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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victor417

铁杆木虫 (正式写手)


[资源] 锂硫电池不用铜箔与泡沫镍做集流体的原因,电化学原位生成Cu2S,NiS最新文献

An effective strategy is explored for the in situ generation of a Cu2S/tubular mesoporous carbon composite by exploiting the charge–discharge processes of a S/C composite on a copper-foil current collector. By studying the reaction mecha-nism, we discover that the dissolved polysulfide ions (from the reaction of pristine sulfur) and inserted Li+ are firmly anchored by the copper ions released from the copper foil, which forms insoluble CuxS intermediates in the mesopore channels of the carbon matrix. Moreover, the new electrochemically active CuxS intermediates are gradually converted to the final product, Cu2S, during subsequent cycles. The as-prepared Cu2S nanoparticles are highly dispersed throughout the tubular mesoporous carbon, and the Cu2S/C composite exhibits a high reversible capacity of 270 mAh g-1 at 0.2 C over 300 cycles, with the negligible capacity loss, when used as a cathode ma-terial for a lithium-ion battery. Furthermore, the composite shows an outstanding rate capability with a reversible capacity
of 225 mAh g-1 under a high rate of 10 C. This work provides a convenient platform for the controlled synthesis of metal sul-fides for lithium-storage applications.
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  • 2014-02-20 09:32:35, 2.28 M

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淡溪风

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非常感谢,受教了
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楼主,学习了,谢谢!
6楼2014-02-20 20:32:29
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简单回复
2014-02-20 11:54   回复  
五星好评  顶一下,感谢分享!
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