Abstract SnO2 has been studied as a promising anode material for lithium-ion batteries due to its high theoretical capacity. However, the large volume change (>300%) and severe structural collapse during cycles are serious. To solve these issues, the porous SnO2 dumbbell-shaped hollow microspheres (DSHSs) were synthesized by a sacrificial template method. The porous SnO2 DSHSs deliver a capacity of 695 mAh g−1 when the current density returns from 1600 to 100 mA g−1. After being tested at larger current density of 1.0 A g−1 for 100 cycles, the capacity retain 602 mAh g−1. The superior performance of porous SnO2 DSHSs can be attributed to the porous and hollow microstructure, which provides more lithium storage sites; shorter Li-ion diffusion length and sufficient void space.

中文翻译：

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多孔SnO 2 空心微球作为高性能锂离子电池负极

摘要 SnO2 因其高理论容量而被研究为一种很有前途的锂离子电池负极材料。然而，循环期间的大体积变化（> 300％）和严重的结构坍塌是严重的。为了解决这些问题，通过牺牲模板法合成了多孔 SnO2 哑铃形空心微球 (DSHS)。当电流密度从 1600 回到 100 mA g-1 时，多孔 SnO2 DSHS 的容量为 695 mAh g-1。在 1.0 A g-1 的较大电流密度下测试 100 次循环后，容量保持在 602 mAh g-1。多孔 SnO2 DSHS 的优异性能可归因于多孔和中空的微观结构，它提供了更多的锂存储位点；更短的锂离子扩散长度和足够的空隙空间。