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Superresilient Hard Carbon Nanofabrics for Sodium-Ion Batteries.
Small ( IF 13.0 ) Pub Date : 2020-02-20 , DOI: 10.1002/smll.201906883 Chenfeng Ding 1, 2 , Lingbo Huang 1 , Jinle Lan 1 , Yunhua Yu 1 , Wei-Hong Zhong 2 , Xiaoping Yang 1
Small ( IF 13.0 ) Pub Date : 2020-02-20 , DOI: 10.1002/smll.201906883 Chenfeng Ding 1, 2 , Lingbo Huang 1 , Jinle Lan 1 , Yunhua Yu 1 , Wei-Hong Zhong 2 , Xiaoping Yang 1
Affiliation
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Developing supermechanically resilient hard carbon materials that can quickly accommodate sodium ions is highly demanded in fabricating durable anodes for wearable sodium-ion batteries. Here, an interconnected spiral nanofibrous hard carbon fabric with both remarkable resiliency (e.g., recovery rate as high as 1200 mm s-1 ) and high Young's modulus is reported. The hard carbon nanofabrics are prepared by spinning and then carbonizing the reaction product of polyacrylonitrile and polar molecules (melamine). The resulting unique hard carbon possesses a highly disordered carbonaceous structure with enlarged interlayer spacing contributed from the strong electrostatic repulsion of dense pyrrolic nitrogen atoms. Its excellent resiliency remains after intercalation/deintercalation of sodium ions. The outstanding sodium-storage performance of the derived anode includes excellent gravimetric capacity, high-power capability, and long-term cyclic stability. More significantly, with a high loading mass, the hard carbon anode displays a high-power capacity (1.05 mAh cm-2 at 2 A g-1 ) and excellent cyclic stability. This study provides a unique strategy for the design and fabrication of new hard carbon materials for advanced wearable energy storage systems.
中文翻译：
用于钠离子电池的超弹性硬碳纳米织物。
在制造用于可穿戴钠离子电池的耐用阳极中，迫切需要开发能够快速容纳钠离子的超机械弹性硬碳材料。在此，报道了具有显着的回弹性（例如，高达1200mm s-1的回复率）和高杨氏模量的互连螺旋纳米纤维硬碳织物。通过旋转然后碳化聚丙烯腈和极性分子（三聚氰胺）的反应产物来制备硬碳纳米织物。所得的独特硬碳具有高度无序的碳质结构，并且由于致密的吡咯氮原子的强静电排斥作用而使层间距增大。在钠离子嵌入/脱嵌后，仍具有出色的回弹性。衍生阳极的出色的钠存储性能包括极好的重力容量，高功率容量和长期循环稳定性。更重要的是，在高负载质量的情况下，硬碳阳极显示出高功率容量（在2 A g-1下为1.05 mAh cm-2）和出色的循环稳定性。这项研究为高级可穿戴式能量存储系统的新型硬碳材料的设计和制造提供了独特的策略。
更新日期：2020-03-20
中文翻译：
用于钠离子电池的超弹性硬碳纳米织物。
在制造用于可穿戴钠离子电池的耐用阳极中，迫切需要开发能够快速容纳钠离子的超机械弹性硬碳材料。在此，报道了具有显着的回弹性（例如，高达1200mm s-1的回复率）和高杨氏模量的互连螺旋纳米纤维硬碳织物。通过旋转然后碳化聚丙烯腈和极性分子（三聚氰胺）的反应产物来制备硬碳纳米织物。所得的独特硬碳具有高度无序的碳质结构，并且由于致密的吡咯氮原子的强静电排斥作用而使层间距增大。在钠离子嵌入/脱嵌后，仍具有出色的回弹性。衍生阳极的出色的钠存储性能包括极好的重力容量，高功率容量和长期循环稳定性。更重要的是，在高负载质量的情况下，硬碳阳极显示出高功率容量（在2 A g-1下为1.05 mAh cm-2）和出色的循环稳定性。这项研究为高级可穿戴式能量存储系统的新型硬碳材料的设计和制造提供了独特的策略。
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