材料科学
阳极
碳化
曲折
锂(药物)
电解质
电化学
化学工程
复合数
电极
多孔性
电池(电)
超级电容器
锂离子电池
纳米技术
复合材料
化学
功率(物理)
扫描电子显微镜
医学
物理化学
量子力学
工程类
内分泌学
物理
作者
Xi Zhang,Yangai Liu,Bing Zhu,Hang Zhao,Ruiyu Mi,Zekun Wang,Peijie He
摘要
Three-dimensional integrated electrode materials have broad application prospects in the field of improving the specific energy of lithium-ion batteries. Metal-organic frameworks and their derivatives are potential anode materials for Li-ion batteries due to their highly controllable composition and structure. Here, we designed and synthesized the Co3O4@carbonized wood (Co3O4@CW) composite as the anode materials of Li-ion batteries by ZIF-67 in situ growth in the balsa wood and high-temperature carbonization. The composite keeps the low-tortuosity and porous structure with a high specific surface area (293.61 m2/g), providing a smooth electrolyte transport path and enabling sufficient reaction sites for lithium-ions, thereby enhancing the electrochemical reactivity. The integrated electrode exhibits a specific capacity of 486.65 mAh/g and good stable performance (90.71% capacity maintain rate) after 200 cycles at the current of 0.2 A/g. The specific capacity reaches 552.37 mAh/g at 0.1 A/g and possessed excellent pseudocapacitive capacity (92.3%, the pseudocapacitive contribution).
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