材料科学
阳极
多孔性
煅烧
化学工程
硫黄
体积热力学
锂(药物)
电导率
电极
纳米技术
复合材料
催化作用
冶金
医学
生物化学
化学
物理
物理化学
量子力学
工程类
内分泌学
作者
Xiaqing Chang,Qizhen Zhu,Qian Zhao,Peng Zhang,Ning Sun,Razium Ali Soomro,Xiaoxue Wang,Bin Xu
标识
DOI:10.1021/acsami.2c19681
摘要
Co3O4 is a potential high-capacity anode material for lithium-ion batteries (LIBs) and potassium-ion batteries (PIBs), but the poor electrical conductivity and large volume fluctuations during long-term cycling severely limit its cycle durability and rate capabilities, especially for PIBs with large K-ion size. Here, we propose a sulfur template route to fabricate an integral 3D porous Co3O4/MXene (Ti3C2Tx) foam using simple vacuum co-filtrating an aqueous dispersion of Co3O4, S and MXene followed by calcining to remove the S template. The 3D porous structure can easily accommodate the large volume changes of Co3O4 while maintains electrode structural integrity, allowing to realize outstanding long-term cycle stability when tested as anodes for both LIBs (620.4 mA h g-1 after 1000 cycles at 1 A g-1) and PIBs (134.1 mA h g-1 after 1000 cycles at 0.5 A g-1). The high metallic conductivity of the 3D porous MXene network further facilitates the electron/ion transmission, resulting in an improved rate capability of 390 mA h g-1 at 13 A g-1 for LIBs and 125.3 mA h g-1 at 1 A g-1 for PIBs. The robust performance of the 3D porous Co3O4/MXene foam reflects its perspective as a high-performance anode material for both LIBs and PIBs.
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