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 capacityof 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.查看更多0个回答 . 22人已关注
求翻译啊 关于荧光寿命试验的结果？Prior to orientation, the film was characterized by lifetime parameters that were typical of stilbene derivatives in isolated and rigid environments as well as in excimer-type arrangements. After film drawing, the long-lived component greatly reduced its contribution, from 10.4 ns to 0.95 ns, which resulted in a photoluminescent trace that was typical of non-interacting dye BBS mechanophores.QQ图片20151026193326.png查看更多6个回答 . 2人已关注
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