纠结的锂离子电池库伦效率的问题？对， 我看过你说的那篇关于sno2和石墨烯的混合材料容量会上升的文章，容量都很高，这里贴一下原文的截图。作者也给出了解释，the decay of reversible capacity of thesno2/graphene during the first 20 cycles could be due to thepulverization of original sno2 and in situ formed sn nanoparticlesduring li insertion/extraction process, which lead to loss ofelectrical connectivity between neighboring particles. duringdischarge/charge cycles, the in situ formed sn nanoparticlesbecame smaller and smaller due to electrochemical milling effect and attached on the graphene sheets tightly. it is reportedthat activation energies for solid-state double decomposition reactionsdecreased with decreasing reagent particle size . thus, theconversion reaction, sno2 + 4li+ +4e?→2li2o+ sn, which is usuallyreported to be irreversible, can become reversible in thesno2/graphene nanocomposite due to the very small sn nanoparticles而且fe3o4/c 也有类似的报道， 我的样品容量上升是在50次循环之后出现的。? ?但我这里的问题是循环20次左右之后，charge capacity 大于discharge capacity，也就是循环效率大于1 。 所以不知有人能否有个更好的解释。文献报道数据.jpg我的实验数据.jpg，查看更多
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