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用于离子电池的空心碳纳米管/碳纳米纤维混合阳极

Yuming Chen, Xiaoyan Li, Kyusung Park

Journal of the American Chemical Society

|October 23, 2013

概括

新型化碳复合材料具有较高的表面积和孔积,作为离子电池的阳极材料表现出卓越的性能,具有出色的容量和稳定性.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
纳米技术纳米技术

背景情况:

开发先进的阳极材料对于提高离子电池性能至关重要.
基于碳的材料由于其独特的电气和结构特性而具有潜力.

研究的目的:

为了合成和描述新的N-doped空心碳纳米管/碳纳米纤维复合材料.
评估这些复合材料作为离子电池的阳极材料的电化学性能.

主要方法:

在现场化学蒸汽沉积被用于材料合成.
布鲁纳乌尔·艾梅特·特勒 (BET) 分析被用来确定表面积和孔隙体积.
进行了电化学测试,以评估可逆能力,速率能力和循环稳定性.

主要成果:

合成的复合材料实现了1840 m2/g的超高BET表面积和1.21 cm3/g的总孔积.
阳极材料在70个循环后在0.1 A/g下显示出~1150 mAh/g的可逆容量.
在8A/g的高电流密度下观察到显著的稳定性,在3500个循环后容量衰减不到20%.

结论:

新的N-doped空心碳纳米管/碳纳米纤维复合材料是先进的离子电池的优质阳极材料.
它们的高表面积,孔积和优异的电化学稳定性有助于提高性能.
这种材料为开发下一代储能解决方案提供了途径.

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