材料科学
过电位
锂(药物)
成核
枝晶(数学)
电化学
图层(电子)
化学工程
纳米技术
电解质
溅射沉积
金属锂
电流密度
快离子导体
金属
导线
化学稳定性
电极
电化学电位
磁滞
导电体
锂离子电池的纳米结构
作者
Geng Li,Xiao Li,Kai Zhu,Yufei Wang,Minghua Chen,Jae‐Kwang Kim,Zhen Chen
标识
DOI:10.1021/acsami.5c18870
摘要
Li1.3Al0.3Ti1.7(PO4)3 (LATP) with a sodium superionic conductor structure has attracted significant attention in recent years owing to its excellent chemical stability and outstanding electrochemical performance. However, direct contact with lithium metal leads to severe interfacial reactions and dendrite penetration, which can be further accelerated under aggressive conditions of fast-charging, hindering its application in solid-state lithium metal batteries (SSLMBs). In this study, we propose a dual-interface engineering strategy to address these challenges. By adopting a magnetron sputtering method, a high-dielectric-constant Ba0.5Sr0.5TiO3 (BST) layer deposited homogenizes the interfacial electric field distribution, while an Ag layer reacts with lithium during cycling to in situ form a Li-Ag alloy, reducing the lithium nucleation overpotential and guiding uniform lithium deposition. This synergistic modification effectively suppresses dendrite formation, enabling symmetric cells to achieve an ultralong cycling lifespan of over 7000 h at 0.1 mA(h) cm-2, with high critical current densities of 2.6 mA cm-2 (constant-time mode) and 3.0 mA cm-2 (constant-capacity mode). Furthermore, the modified full-cells retain 63.9% of initial capacity after 1000 cycles at 0.5 C. This work provides an effective interfacial design strategy for the development of safe and durable SSLMBs.
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