Abstract Silicon-embedded porous carbon microspheres with an exceptional conductive framework for ions and electrons were obtained by electrospraying a mixed polymer solution of polystyrene and polyvinylpyrrolidone, containing silicon nanoparticles, carbon nanotubes and carbon blacks, and subsequent heat treatment. In the composite microspheres, silicon particles were embedded in the porous carbon framework composed of interwoven carbon nanotubes, filled carbon blacks and interconnected amorphous carbon derived from polymers. The cage-like porous carbon microspheres could not only accommodate the volume expansion of silicon but also ensure a robust electrical contact, fast transport for electrons and ions. Therefore, the silicon/carbon anode exhibits a high capacity of 1325 mAh g−1 at 0.2 A g−1 after 60 cycles and superior rate capability with a capacity of 925 mAh g−1 at a large current density of 5 A g−1.

中文翻译：

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电喷雾硅嵌入多孔碳微球作为锂离子电池负极，具有优异的倍率容量

摘要 通过电喷雾聚苯乙烯和聚乙烯吡咯烷酮的混合聚合物溶液，含有硅纳米粒子、碳纳米管和炭黑，并随后进行热处理，获得了具有优异的离子和电子导电骨架的硅嵌入多孔碳微球。在复合微球中，硅颗粒嵌入由交织的碳纳米管、填充的炭黑和由聚合物衍生的相互连接的无定形碳组成的多孔碳框架中。笼状多孔碳微球不仅可以适应硅的体积膨胀，还可以确保牢固的电接触、电子和离子的快速传输。因此，硅/碳负极在 0 时表现出 1325 mAh g-1 的高容量。