In situ synthesized SnSe nanorods in a SnOx@CNF membrane toward high-performance freestanding and binder-free lithium-ion batteries†,Inorganic Chemistry Frontiers

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In situ synthesized SnSe nanorods in a SnOx@CNF membrane toward high-performance freestanding and binder-free lithium-ion batteries†
Inorganic Chemistry Frontiers ( IF 6.1 ) Pub Date : 2018-02-09 00:00:00 , DOI: 10.1039/c7qi00762k
Haocheng Yuan _{1,

2,

3,

4,

5} , Yuqiang Jin _{1,

2,

3,

4,

5} , Jinle Lan _{1,

2,

3,

4,

5} , Yuan Liu _{5,

6,

7,

8,

9} , Yunhua Yu _{1,

2,

3,

4,

5} , Xiaoping Yang _{1,

2,

3,

4,

5}

Affiliation

The poor reversibility of the first conversion reaction (SnO₂ + 4Li⁺ + 4e⁻ → Sn + 2Li₂O) and the inferior electrical conductivity of the resulting Li₂O make tin oxides not make full use of their lithium storage performance. In this study, various amounts of SnSe nanorods were in situ incorporated into SnO_x@CNFs via electrospinning and thermal treatment processes. Binder-free SnSe/SnO_x@CNFs exhibit a greatly enhanced lithium-ion storage performance due to their higher electrical conductivity, faster Li-ion diffusivity, and better reversible ability. The optimal SnSe/SnO_x@CNFs exhibited a higher initial coulombic efficiency (86.5%) and better reversible capacity (740.7 mA h g⁻¹ at 200 mA g⁻¹ after 70 cycles) than pristine SnO_x@CNFs (68.1%, 552 mA h g⁻¹ at 200 mA g⁻¹ after 70 cycles). Moreover, the high capacity of the SnSe/SnO_x@CNF electrode can be maintained as high as 345 mA h g⁻¹ at 1 A g⁻¹ over 1000 cycles, demonstrating its robust long-term stability. This work provides new insights for designing high-performance tin-based anode materials for lithium-ion batteries.

中文翻译：

SnO _x @CNF膜中的原位合成SnSe纳米棒，用于高性能的独立式和无粘结剂锂离子电池†

第一转换反应的可逆性较差（SNO ₂ + 4Li ⁺ + 4e中^- →锡+ 2LI ₂ O），将所得Li的劣电导率₂ ö化妆锡氧化物不能充分利用的其锂存储性能。在这项研究中，通过静电纺丝和热处理工艺将各种数量的SnSe纳米棒原位掺入SnO _x @CNFs中。无粘结剂的SnSe / SnO _x @CNFs具有更高的电导率，更快的锂离子扩散率和更好的可逆性，从而大大增强了锂离子的存储性能。最佳SnSe / SnO _x@CNF表现出比原始SnO _x @CNFs更高的初始库伦效率（86.5％）和更好的可逆容量（740.7 mA hg ^-1在200 mA g ^-1后在70个循环后）（68.1％，552 mA hg ^-1在200 mA下）70个循环后g ^-1）。此外，SnSe / SnO _x @CNF电极的高容量可以在1000次循环中以1 A g ^-1维持高达345 mA hg ^-1的容量，这证明了其强大的长期稳定性。这项工作为设计用于锂离子电池的高性能锡基负极材料提供了新的见识。

更新日期：2018-02-09

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