Aqueous-solution synthesis of Na3SbS4 solid electrolytes for all-solid-state Na-ion batteries†,Journal of Materials Chemistry A

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Aqueous-solution synthesis of Na3SbS4 solid electrolytes for all-solid-state Na-ion batteries†
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2017-12-18 00:00:00 , DOI: 10.1039/c7ta09242c
Tae Won Kim _{1,

2,

3,

4,

5} , Kern Ho Park _{1,

2,

3,

4,

5} , Young Eun Choi _{1,

2,

3,

4,

5} , Ju Yeon Lee _{1,

2,

3,

4,

5} , Yoon Seok Jung _{1,

2,

3,

4,

5}

Affiliation

Room-temperature-operable all-solid-state Na-ion batteries (ASNBs) using sulfide Na-ion solid electrolytes (SEs) are promising because of their potential for greater safety, lower cost, and acceptable performance. Despite extensive developments in the area of sulfide Na-ion SEs, their poor chemical stability and prospects for wet-chemical synthesis have been overlooked to date. Herein, the scalable synthesis of Na₃SbS₄via aqueous-solution routes using precursors of Na₂S, Sb₂S₃, and elemental sulfur for ASNBs is described. With no concerns about the evolution of toxic H₂S gas, the aqueous-solution-synthesized Na₃SbS₄ exhibits high ionic conductivities (0.1–0.2 mS cm⁻¹ at 25 °C). Importantly, the homogeneity of the aqueous solutions enables the creation of uniform Na₃SbS₄ coatings on FeS₂. Fe₂S/Na–Sn ASNBs, employing the aqueous-solution-synthesized Na₃SbS₄ and the Na₃SbS₄-coated FeS₂ for the SE layer and positive electrode, respectively, demonstrate a high charge capacity of 256 or 346 mA h g⁻¹ with good reversibility at 30 °C, highlighting their potential for practical applications.

中文翻译：

用于全固态Na离子电池的Na ₃ SbS ₄固体电解质的水溶液合成†

使用硫化钠离子固体电解质（SE）的可在室温下操作的全固态钠离子电池（ASNB）具有广阔的前景，因为它们具有更大的安全性，更低的成本和可接受的性能。尽管硫化物Na-离子SEs领域取得了长足的发展，但迄今为止，它们的不良化学稳定性和湿化学合成的前景一直被人们所忽视。在此，描述了使用Na ₂ S，Sb ₂ S ₃和元素硫的前体用于ASNB的经由水溶液路线的可扩展合成Na ₃ SbS ₄。水溶液合成的Na ₃ SbS ₄无需担心有毒H ₂ S气体的释放表现出高离子电导率（在25°C下为0.1–0.2 mS cm ^-1）。重要的是，水溶液的均质性使得能够在FeS ₂上形成均匀的Na ₃ SbS ₄涂层。Fe ₂ S / Na–Sn ASNBs分别采用水溶液合成的Na ₃ SbS ₄和Na ₃ SbS ₄包覆的FeS _2分别用于SE层和正电极，显示出256或346 mA的高充电容量hg ^-1在30°C时具有良好的可逆性，突出了其在实际应用中的潜力。

更新日期：2017-12-18

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