Stable cyclability of porous Si anode applied for sulfide-based all-solid-state batteries
Stable cyclability of porous Si anode applied for sulfide-based all-solid-state batteries
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DOI：
10.1016/j.egypro.2018.11.125
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
R. Okuno;Mari Yamamoto;Y. Terauchi;Masanari Takahashi
中科院分区：
文献类型：
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作者：
R. Okuno;Mari Yamamoto;Y. Terauchi;Masanari Takahashi
将多孔硅作为负极材料应用于以Li3PS4为电解质的全固态锂离子电池。球磨多孔硅复合阳极在100次循环中表现出90%以上的高容量保持率。相比之下，对于非多孔Si复合阳极观察到较差的循环稳定性。提出了结构模型，以一致地解释所有的周期特征。我们认为Si颗粒中的孔隙缓解了锂化和脱锂过程中的大体积变化，从而导致高容量保持率。
Porous Si was applied as the anode material to all-solid-state lithium-ion batteries with Li3PS4electrolyte. The ball-milled porous Si composite anode exhibited a high capacity retention over 90 % at 100 cycles. In contrast, the poorer cycle stability was observed for the non-porous Si composite anodes. The structural models were proposed to consistently explain all the cycle characteristics. We believe that the pores in Si particles relieved the large volume change during the lithiation and delithiation, resulting in the high capacity retention.