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Abstract：
There is an ever-increasing demand for rechargeable batteries with fast charging, long cycling, high safety, and low cost in new energy storage systems. Herein, a heterogeneous architecture composed of MoS2-coupled carbon nanosheets encapsulated on sodium titanate nanowires is developed and demonstrated as an advanced anode for sodium-ion batteries (SIBs). Owing to the synergistic effects of ultrastable substrate of 1D sodium titanate (NTO) nanowires, high-capacity promoter of 2D MoS2 nanosheets as well as the 2D conductive carbon matrix, the resulting 1D/2D-2D hybrid demonstrates excellent high-rate capacity and super-durable cyclability, delivering a stable capacity of up to 425.5 mAh g-1 at 200 mA g-1. Even at an ultrafast charging/discharging process within 80 s, the capacity can be maintained at 201 mAh g-1 after 16 000 cycles with only 0.0012% capacity loss per cycle, one of the best high-rate capacities and cyclabilities for NTO-based hybrid composites. The present work highlights the designing protocol of hierarchical nanoarchitectures with stable substrate and high-capacity electrodes for next-generation energy storage applications.
摘要：
对快速充电的可充电电池的需求不断增加，长时间骑自行车,安全性高,和低成本的新型储能系统。在这里，开发了由封装在钛酸钠纳米线上的MoS2偶联的碳纳米片组成的异质结构，并将其证明为钠离子电池（SIB）的先进阳极。由于1D钛酸钠（NTO）纳米线的超稳定衬底的协同作用，2DMoS2纳米片以及2D导电碳基质的高容量促进剂，所得的1D/2D-2D混合表现出优异的高速率容量和超持久的循环能力，在200mAg-1时提供高达425.5mAhg-1的稳定容量。即使在80s内的超快充电/放电过程中，16000次循环后，容量可以保持在201mAhg-1，每个循环只有0.0012%的容量损失，NTO基混合复合材料的最佳高倍率容量和循环能力之一。本工作重点介绍了具有稳定衬底和高容量电极的分层纳米体系结构的设计方案，用于下一代能量存储应用。
