Synthesis of mesoporous SnO2 spheres via self-assembly and superior lithium storage properties
Synthesis of mesoporous SnO2 spheres via self-assembly and superior lithium storage properties
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DOI：
10.1016/j.electacta.2010.11.072
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发表时间：
2011-02
影响因子：
6.6
通讯作者：
Xiaoming Yin;Libao Chen;Chengchao Li;Quanyi Hao;Shuang Liu;Q. Li;E. Zhang;Taihong Wang
中科院分区：
文献类型：
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作者：
Xiaoming Yin;Libao Chen;Chengchao Li;Quanyi Hao;Shuang Liu;Q. Li;E. Zhang;Taihong Wang
本文首次报道了一种制备锂离子电池用sno2介孔球的简单方法。在353K条件下进行初反应30min，在773K条件下进行煅烧，制备了尺寸为100 ~ 300nm的介孔sno2微球。小颗粒的纳米效应和三维介孔结构促进了电解质和锂离子的转移，抑制了体积变化，大大提高了循环性能。作为负极材料，在200mAg−1的电流密度下，循环50次后可输出761mAhg−1的容量。即使在2Ag−1时，经过50次循环后仍保持480mAhg−1。此外，我们认为结构的高稳定性是改善循环性能的原因。
This paper firstly reported a simple route to prepare SnO2mesoporous spheres for lithium ion battery. Mesoporous SnO2spheres in range of 100–300nm were prepared by primary reaction at 353K for 30min, and calcination process at 773K, which could be scaled up for manufacturing. The nano-size effect of the small particle and the 3D mesoporous structure promoted the electrolyte and lithium ion transfer and suppressed the volume changes, which greatly enhanced the cycle performances. As the anode material, it could deliver 761mAhg−1capacity after 50 cycles at the current density of 200mAg−1. Even at 2Ag−1, it retained 480mAhg−1after 50 cycles. Furthermore, we suggested that the high stability of the structure was responsible for the improved cycle properties.