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Regulate Phosphorus Configuration in High P-Doped Hard Carbon as a Superanode for Sodium Storage
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2021-03-03 , DOI: 10.1021/acsami.0c23165 Xiaoyan Wang 1 , Mingxing Hou 2 , Zhenglu Shi 1 , Xiang Liu 1, 3 , Isao Mizota 4 , Hongtao Lou 5 , Bin Wang 6 , Xianhua Hou 1
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2021-03-03 , DOI: 10.1021/acsami.0c23165 Xiaoyan Wang 1 , Mingxing Hou 2 , Zhenglu Shi 1 , Xiang Liu 1, 3 , Isao Mizota 4 , Hongtao Lou 5 , Bin Wang 6 , Xianhua Hou 1
Affiliation
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Heteroatom-doped hard carbon is a popular method to optimize the electrochemical performance of anode electrodes for sodium-ion batteries. Herein, phosphorus-doped hollow carbon nanorods (P-HCNs) are obtained by a one-step synthesis with a high phosphorus content of 7.5 atom %. By controlling the P configuration, the P-HCNs03 exhibits reversible capacity as high as 260 mA h g–1 at the current density of 1.0 A g–1 after 500 cycles with an initial Coulombic efficiency (ICE) of 73%. When the amount of phosphorus in the as-prepared materials is changed, the different structures of the P-doped carbon lattices are analyzed by X-ray diffraction, Raman spectroscopy, and X-ray photoelectron spectroscopy. Based on the first-principles calculation, although the P–O bond has the most configurations, the excellent reversible capacity of the electrode is attributed to the strong Na-absorption ability of P═O and P–C bonds. The sodium-based dual-ion batteries (NDIBs) assembled with P-HCNs03 as an anode and expanded graphite as a cathode (P-HCNs03//EG) exhibited a high energy density of 138 W h kg–1 at a power density of 159 W kg–1. The results provide an important angle to optimize the performance of hard carbons with other functionalized heteroatoms.
中文翻译：
调节高P掺杂硬碳中磷的组态，以作为钠存储的超级阳极
杂原子掺杂的硬碳是优化钠离子电池阳极电极电化学性能的常用方法。在此，磷掺杂空心碳纳米棒（P-HCNs）是通过一步合成法合成的，磷含量为7.5原子％，高。通过控制P配置，P-HCNs03在1.0 A g –1的电流密度下可显示高达260 mA hg –1的可逆容量。500次循环后，初始库仑效率（ICE）为73％。当所制备的材料中的磷含量发生变化时，通过X射线衍射，拉曼光谱和X射线光电子能谱分析P掺杂碳晶格的不同结构。根据第一性原理计算，尽管P–O键具有最多的构型，但电极的优异可逆容量归因于P═O和P–C键的强大的Na吸收能力。钠基双离子电池（NDIBs）以P-HCNs03为阳极，膨胀石墨为阴极（P-HCNs03 // EG），功率密度为138 W h kg –1。 159千克–1。结果为优化硬碳与其他功能化杂原子的性能提供了重要的角度。
更新日期：2021-03-17
中文翻译：
调节高P掺杂硬碳中磷的组态，以作为钠存储的超级阳极
杂原子掺杂的硬碳是优化钠离子电池阳极电极电化学性能的常用方法。在此，磷掺杂空心碳纳米棒（P-HCNs）是通过一步合成法合成的，磷含量为7.5原子％，高。通过控制P配置，P-HCNs03在1.0 A g –1的电流密度下可显示高达260 mA hg –1的可逆容量。500次循环后，初始库仑效率（ICE）为73％。当所制备的材料中的磷含量发生变化时，通过X射线衍射，拉曼光谱和X射线光电子能谱分析P掺杂碳晶格的不同结构。根据第一性原理计算，尽管P–O键具有最多的构型，但电极的优异可逆容量归因于P═O和P–C键的强大的Na吸收能力。钠基双离子电池（NDIBs）以P-HCNs03为阳极，膨胀石墨为阴极（P-HCNs03 // EG），功率密度为138 W h kg –1。 159千克–1。结果为优化硬碳与其他功能化杂原子的性能提供了重要的角度。
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