Atomic layer deposition of crystalline epitaxial MoS2 nanowall networks exhibiting superior performance in thin-film rechargeable Na-ion batteries†,Journal of Materials Chemistry A

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Atomic layer deposition of crystalline epitaxial MoS2 nanowall networks exhibiting superior performance in thin-film rechargeable Na-ion batteries†
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2018-01-02 00:00:00 , DOI: 10.1039/c7ta09399c
M. B. Sreedhara _{1,

2,

3,

4,

5} , Subhra Gope _{5,

6,

7,

8} , Badri Vishal _{1,

2,

3,

4,

5} , Ranjan Datta _{1,

2,

3,

4,

5} , Aninda J. Bhattacharyya _{5,

6,

7,

8} , C. N. R. Rao _{1,

2,

3,

4,

5}

Affiliation

We have grown ultrathin crystalline epitaxial thin films of MoS₂ on c-sapphire by employing atomic layer deposition, without the need for post-annealing. The films have been characterized by using various microscopic and spectroscopic techniques. The crystallographic epitaxial relationships between the films and the substrate are 〈01−10〉 Al₂O₃∥〈11−20〉 MoS₂ and 〈0001〉Al₂O₃∥〈0001〉 MoS₂. Interestingly, the films show a high density of nanowalls and exhibit a high surface to volume ratio. The high surface area of the nanowall network results in excellent electrochemical characteristics as demonstrated by the performance of the Na-ion battery with MoS₂ as the active electrode. The battery exhibits high capacity, remarkable stability, cyclability and high rate capability over a wide range of operating currents, even in the absence of conducting and binder additives. The MoS₂ Li-ion battery also exhibits similar features.

中文翻译：

晶体外延MoS ₂纳米壁网络的原子层沉积在薄膜可充电Na离子电池中表现出卓越的性能†

我们已经通过采用原子层沉积技术在c蓝宝石上生长了MoS _2的超薄晶体外延薄膜，而无需进行后退火处理。通过使用各种显微和光谱技术对薄膜进行了表征。薄膜和基片之间的外延晶关系是<01-10>的Al ₂ ö ₃ ∥<11-20>的MoS ₂和<0001>的Al ₂ ö ₃ ∥<0001>的MoS ₂。有趣的是，这些膜显示出高密度的纳米壁并且显示出高的表面体积比。纳米壁网络的高表面积可产生出色的电化学特性，如以MoS ₂作为活性电极的Na离子电池的性能所证明。即使在没有导电和粘合剂添加剂的情况下，该电池在宽范围的工作电流下仍具有高容量，出色的稳定性，可循环性和高倍率性能。MoS ₂锂离子电池也具有相似的功能。

更新日期：2018-01-02

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