Multi-shell tin phosphide nanospheres as high performance anode material for a sodium ion battery,Sustainable Energy & Fuels

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Multi-shell tin phosphide nanospheres as high performance anode material for a sodium ion battery
Sustainable Energy & Fuels ( IF 5.0 ) Pub Date : 2017-09-01 00:00:00 , DOI: 10.1039/c7se00355b
Sheng Huang _{1,

2,

3,

4,

5} , Chao Meng _{1,

2,

3,

4,

5} , Min Xiao _{1,

2,

3,

4,

5} , Shan Ren _{1,

2,

3,

4,

5} , Shuanjin Wang _{1,

2,

3,

4,

5} , Dongmei Han _{4,

6,

7,

8} , Yuning Li _{9,

10,

11,

12} , Yuezhong Meng _{1,

2,

3,

4,

5}

Affiliation

Tin phosphide (Sn₄P₃) combined with the good conductivity of tin (Sn) and high capacity of phosphorus has been reported to be a potential anode material for the sodium ion battery (SIB). However, the preparation of Sn₄P₃ is limited to ball-milling and compositing with carbon materials. The novel and detailed structure of Sn₄P₃ itself has so far not been revealed. In this research, the multi-shell Sn₄P₃ nano-structure was obtained, for the first time, using a simple and general low temperature solvothermal method. The multi-shell structure with a larger specific surface area and interlayer space endows this new anode material with a short cut pathway for sodium ion diffusion and a buffer space for volume expansion during sodiation, thus avoiding electrode pulverization and improving the cycling performance of the SIB. The as-prepared multi-shell Sn₄P₃ delivers an excellent specific capacity of 770 mAh g⁻¹ with capacity retention of 96% after 50 cycles at the current density of 50 mA g⁻¹, demonstrating the superiority of structure optimization in SIB anode preparation.

中文翻译：

多壳磷化锡纳米球作为钠离子电池的高性能负极材料

据报道，磷化锡（Sn ₄ P ₃）与锡（Sn）的良好导电性和高磷容量相结合，是钠离子电池（SIB）的潜在阳极材料。但是，Sn ₄ P ₃的制备仅限于球磨和与碳材料复合。迄今为止，尚未揭示Sn ₄ P ₃本身的新颖而详细的结构。在本研究中，多壳Sn ₄ P ₃使用一种简单而通用的低温溶剂热方法首次获得了纳米结构。具有较大比表面积和层间空间的多壳结构为这种新型阳极材料赋予了钠离子扩散的捷径和在固态化过程中体积膨胀的缓冲空间，从而避免了电极粉化并改善了SIB的循环性能。所制备的多壳Sn ₄ P ₃在电流密度为50 mA g ^{-1的情况下}经过50次循环后，具有770 mAh g ^-1的出色比容量和96％的容量保持率，证明了SIB中结构优化的优越性阳极准备。

更新日期：2017-09-11

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