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Space‐Confined Fabrication of MoS2@Carbon Tubes with Semienclosed Architecture Achieving Superior Cycling Capability for Sodium Ion Storage
Advanced Materials Interfaces ( IF 4.3 ) Pub Date : 2020-09-09 , DOI: 10.1002/admi.202000953 Yuan Zhang 1 , Wei Liu 1 , Tianqi Wang 1 , Yongxu Du 1 , Yongpeng Cui 1 , Shuang Liu 1 , Huanlei Wang 1 , Shuai Liu 1 , Ming Chen 1 , Junan Zhou 1
Advanced Materials Interfaces ( IF 4.3 ) Pub Date : 2020-09-09 , DOI: 10.1002/admi.202000953 Yuan Zhang 1 , Wei Liu 1 , Tianqi Wang 1 , Yongxu Du 1 , Yongpeng Cui 1 , Shuang Liu 1 , Huanlei Wang 1 , Shuai Liu 1 , Ming Chen 1 , Junan Zhou 1
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High rate and good cycling capability are always difficult for sodium ion anode materials owing to the unstable electrode structure induced by reversibly intercalation of large‐sized sodium ions. In this paper, based on the unique nanotube arrays of crab shells, a novel space‐confined growth of MoS2 nanosheets in carbon nanotubes is reported to fabricate MoS2@carbon nanotube (MoS2@CT) with a semienclosed architecture. Due to the space‐confined effect, MoS2 sheets are nanosized with poor stacking feature, which are anchored on the inner surface of carbon tubes. The semienclosed architecture built of carbon nanotubes and abundant MoS2 nanosheets enhances the stability and integrity of the electrode structure during cycles. Thereby, the coupling effect of stable structure and MoS2 with fast kinetics achieves a comprehensive performance improvement of the MoS2@CT anode materials. Particularly for cycling capability, it delivers a capacity of 170 mAh g−1 after 10 000 cycles at a high current density of 10 A g−1, which is comparable for most previously reported cases. The assembled Na‐ion hybrid supercapacitors device delivers a high energy density of 82 Wh kg−1 at a power density of 2000 W kg−1 after 5000 cycles with an 89% retention.
中文翻译：
半封闭式结构的MoS2 @碳管的空间受限制造，可实现出色的钠离子存储循环能力
由于大尺寸钠离子的可逆插入引起的电极结构不稳定，钠离子阳极材料始终难以获得高速率和良好的循环能力。在本文中，基于蟹壳的独特纳米管阵列，据报道，碳纳米管中MoS 2纳米片的新型空间限制生长可制造具有半封闭结构的MoS 2 @碳纳米管（MoS 2 @CT）。由于空间限制的作用，MoS 2薄板是纳米级的，具有较差的堆叠特性，它们被固定在碳管的内表面上。由碳纳米管和丰富的MoS 2构成的半封闭体系结构纳米片增强了循环过程中电极结构的稳定性和完整性。从而，稳定的结构和具有快速动力学的MoS 2的耦合效应实现了MoS 2 @CT阳极材料的综合性能改进。特别是对于循环能力，它提供一个容量为170毫安时的克-1以10A g的高电流密度10 000次循环之后-1，这对于大多数先前报道的病例相媲美。经过组装的Na-ion混合超级电容器设备在经过5000次循环后可提供82 Wh kg -1的高能量密度，而功率密度为2000 W kg -1，保留89％。
更新日期：2020-11-06
中文翻译：
半封闭式结构的MoS2 @碳管的空间受限制造，可实现出色的钠离子存储循环能力
由于大尺寸钠离子的可逆插入引起的电极结构不稳定，钠离子阳极材料始终难以获得高速率和良好的循环能力。在本文中，基于蟹壳的独特纳米管阵列，据报道，碳纳米管中MoS 2纳米片的新型空间限制生长可制造具有半封闭结构的MoS 2 @碳纳米管（MoS 2 @CT）。由于空间限制的作用，MoS 2薄板是纳米级的，具有较差的堆叠特性，它们被固定在碳管的内表面上。由碳纳米管和丰富的MoS 2构成的半封闭体系结构纳米片增强了循环过程中电极结构的稳定性和完整性。从而，稳定的结构和具有快速动力学的MoS 2的耦合效应实现了MoS 2 @CT阳极材料的综合性能改进。特别是对于循环能力，它提供一个容量为170毫安时的克-1以10A g的高电流密度10 000次循环之后-1，这对于大多数先前报道的病例相媲美。经过组装的Na-ion混合超级电容器设备在经过5000次循环后可提供82 Wh kg -1的高能量密度，而功率密度为2000 W kg -1，保留89％。
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