文章基本信息

标题：Interfacial Architecture for Extra Li⁺ Storage in All-Solid-State Lithium Batteries
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作者：Bum Ryong Shin ; Young Jin Nam ; Jin Wook Kim 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2014
卷号：4
DOI：10.1038/srep05572
出版社：Springer Nature
摘要：The performance of nanocomposite electrodes prepared by controlled ball-milling of TiS₂ and a Li₂S–P₂S₅ solid electrolyte (SE) for all-solid-state lithium batteries is investigated, focusing on the evolution of the microstructure. Compared to the manually mixed electrodes, the ball-milled electrodes exhibit abnormally increased first-charge capacities of 416 mA h g⁻¹ and 837 mA h g⁻¹ in the voltage ranges 1.5–3.0 V and 1.0–3.0 V, respectively, at 50 mA g⁻¹ and 30°C. The ball-milled electrodes also show excellent capacity retention of 95% in the 1.5–3.0 V range after 60 cycles as compared to the manually mixed electrodes. More importantly, a variety of characterization techniques show that the origin of the extra Li⁺ storage is associated with an amorphous Li–Ti–P–S phase formed during the controlled ball-milling process.