材料科学
集电器
电极
储能
碳化
碳纤维
曲折
锂(药物)
导电体
磷酸铁锂
纳米技术
电池(电)
电流(流体)
工作(物理)
复合材料
多孔性
机械工程
电气工程
电化学
电解质
扫描电子显微镜
物理化学
功率(物理)
内分泌学
工程类
化学
物理
复合数
医学
量子力学
作者
Chaoji Chen,Ying Zhang,Yiju Li,Yudi Kuang,Jianwei Song,Wei Luo,Yanbin Wang,Yonggang Yao,Glenn Pastel,Jia Xie
标识
DOI:10.1002/aenm.201700595
摘要
The growing demand for advanced energy storage techniques and devices has driven the energy storage market to strive for higher performance, longer cycling life, and better safety. Thick electrode design enabling more electroactive materials has the potential to significantly improve the energy density on device level yet faces major challenges of slow ion transport and high deformability. Here, inspired by natural wood materials with aligned channels along the tree growth direction, a highly conductive, lightweight, and low‐tortuosity carbon framework (CF) directly carbonized from natural wood as an ultrathick 3D current collector is demonstrated. Benefiting from the uniqueness of the multichanneled CF, an ultrathick 3D electrode of lithium iron phosphate filled carbon framework with a large thickness of 800 µm and active material mass loading of 60 mg cm −2 delivers a rational capacity of 7.6 mAh cm −2 (95 Ah L −1 based on volume), long cycling life, and lower deformability with enhanced mechanical properties. This work presents a design concept for thick electrode toward high performance energy storage devices that are not limited to lithium‐ion batteries.
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