Size control of sulfide-based solid electrolyte particles through liquid-phase synthesis
Size control of sulfide-based solid electrolyte particles through liquid-phase synthesis
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DOI：
10.1016/j.powtec.2021.04.050
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发表时间：
2021-07
影响因子：
5.2
通讯作者：
Shuji Ohsaki;T. Yano;Akihiro Hatada;Hideya Nakamura;S. Watano
中科院分区：
文献类型：
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作者：
Shuji Ohsaki;T. Yano;Akihiro Hatada;Hideya Nakamura;S. Watano
全固态锂离子电池（ASS-LiB）由于其高安全性和能量密度而作为下一代二次电池受到关注。ASS-LiB由无机固体电解质组成，而不是有机液体电解质。因此，间隙空隙使电池容量劣化，这是ASS-LiB的严重问题。这个问题的一个简单的解决方案是使用较小的颗粒填充空隙。然而，粒度控制尚未建立，并且对粒度控制的研究不足。本文采用液相振荡法合成了典型的硫化物固体电解质Li 3 PS4（LPS）纳米固体电解质颗粒。以亚微米级的Li 2S为原料，采用湿磨和溶解-沉淀法制备了亚微米级的Li 2S，提高了LPS的成核速率。因此，采用液相振荡法制备了具有高离子电导率的LPS纳米粒子。
All-solid-state lithium-ion batteries (ASS-LiB) have garnered attention as the next-generation secondary batteries owing to their high safety and energy densities. The ASS-LiBs are composed of inorganic solid electrolytes, instead of an organic liquid electrolyte. Therefore, interstitial voids deteriorate the battery capacity, which is a serious problem with ASS-LiBs. A straightforward solution to this problem is to fill the voids using smaller particles. However, the particle size control is yet to be established, and there are insufficient studies on particle size control. In this study, nano-sized solid electrolyte particles of Li3PS4(LPS), which is a typical sulfide solid electrolyte, was synthesized using a liquid-phase shaking method. The nucleation rate of LPS was improved using the submicron-sized Li2S as raw material, which was prepared through wet milling and dissolution-precipitation processes. Consequently, the liquid-phase shaking method with fine Li2S powder was successfully used to synthesize the nano-sized LPS particles with high ionic conductivity.