阳极
电解质
阴极
复合数
电化学
离子电导率
锂(药物)
材料科学
化学工程
准固态
图层(电子)
电池(电)
复合材料
电极
化学
色素敏化染料
功率(物理)
物理
物理化学
量子力学
工程类
医学
内分泌学
作者
Yang Li,Guoxu Wang,Li‐Zhen Fan
标识
DOI:10.1002/batt.202200212
摘要
Abstract All‐solid‐state lithium batteries with solid‐state electrolytes (SSEs) have gained worldwide attention due to their intrinsic safety and high energy density. However, there is no single electrolyte that can satisfy the out‐of‐sync requirements of both the anode and cathode interface. Herein, an ultrathin asymmetric composite electrolyte (ACE) is prepared by a simple slurry‐casting method, in which a Li 6.75 La 3 Zr 1.75 Ta 0.25 O 12 (LLZTO) enrichment layer with high modulus is used to match the lithium anode and a polymer layer with high electrochemical stability is formed at the cathode. Meanwhile, a polyimide (PI) film is used as a scaffold to improve the mechanical properties of the electrolyte. As a result, the ACE with a thickness of 35 μm exhibits an ionic conductivity of 1.34×10 −4 S cm −1 at room temperature. Furthermore, both the LiNi 0.5 Co 0.2 Mn 0.3 O 2 /ACE/Li and LiFePO 4 /ACE/Li full cells exhibit excellent electrochemical performances.
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