分离器(采油)
阳极
材料科学
电解质
电极
集电器
电化学
多孔性
化学工程
电流密度
纳米技术
复合材料
化学
物理
物理化学
量子力学
工程类
热力学
作者
Songquan Zhang,Meng Wang,Zhiming Zhou,Yongbing Tang
标识
DOI:10.1002/adfm.201703035
摘要
Abstract Searching for low‐cost and high‐capacity electrode materials such as metal anodes is of important significance for the development of new generation rechargeable batteries. However, metal anodes always suffer from severe volume expansion/contraction during a repeated electrochemical alloying/dealloying process. In this study, a novel concept about modifying metal‐anodes‐based battery construction with a multifunctional electrode (ME) design is provided. The ME consists of a 3D porous separator that is modulated with a patterned aluminum anode, which simultaneously works as a current collector, anode material, and separator in a dual‐ion battery (DIB). The 3D porous separator not only enables the ME to possess significantly improved electrolyte uptake and retention capabilities, but also acts as a protecting layer to restrict the surface pulverization of the Al anode. The ME‐DIB displays remarkably enhanced cell performances, including excellent cycling stability with 92.4% capacity retention after 1000 cycles at a current density of 2 C, and superior rate performance with 80.7% capacity retention at 10 C.
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