材料科学
电解质
离子电导率
锂(药物)
硫化物
阴极
锂离子电池的纳米结构
储能
薄膜
化学工程
阳极
快离子导体
纳米技术
电极
冶金
物理
工程类
内分泌学
物理化学
功率(物理)
医学
化学
量子力学
作者
Gaolong Zhu,Chen‐Zi Zhao,Hong‐Jie Peng,Hong Yuan,Jie Hu,Haoxiong Nan,Yang Lu,Xin‐Yan Liu,Jia‐Qi Huang,Chuanxin He,Jian Zhang,Qiang Zhang
标识
DOI:10.1002/adfm.202101985
摘要
Abstract All‐solid‐state (ASS) lithium metal batteries (LMBs) are considered the most promising next‐generation batteries due to their superior safety and high projected energy density. To access the practically desired high energy density of ASS LMBs, an ultrathin solid‐state electrolyte (SSE) film with fast ion‐transport capability presents as an irreplaceable component to reduce the proportion of inactive materials in ASS batteries. In this contribution, an ultrathin (60 µ m), flexible, and free‐standing argyrodite (Li 6 PS 5 Cl) SSE film is designed through a self‐limited strategy. A chemically compatible cellulose membrane is employed as the self‐limiting skeleton that not only defined the thinness of the sulfide SSE film but also strengthened its mechanical properties. The ionic conductivity of the SSE film reaches up to 6.3 × 10 −3 S cm −1 at room temperature, enabling rapid lithium‐ion transportation. The self‐limited SSE thin films are evaluated in various ASS LMBs with different types of cathode (sulfur and lithium titanate) and anode materials (lithium and lithium‐indium alloy) at both mold‐cell and pouch‐cell levels, demonstrating a stable performance and high‐rate capability. This study provides a general strategy for the rational design of an SSE thin film towards high‐energy‐density ASS batteries.
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