Although high mechanical and electronic properties have made carbon nanotube (CNT) a promising active material for lithium ion batteries, the relatively low theoretical specific capacity (372 mAh g⁻¹) of CNT has hindered its application. Here we have developed a general and efficient template strategy in synthesizing a new family of CNTs with controllable hollow walls and explored their promising applications in LIBs. The hollow structure formed between CNT core and nitrogen-doped graphene shell can be effectively used for lithium storage, and a reversible specific capacity of 635 mAh g⁻¹ was achieved as anode material in LIB. Interestingly, the hollow structure has been further incorporated with silicon to offer even higher specific capacity of 930 mAh g⁻¹ with good cyclic stability.

尽管高的机械和电子性能已经使碳纳米管（CNT）成为锂离子电池的有希望的活性材料，但相对较低的CNT理论比容量（372 mAh g ^-1）阻碍了其应用。在这里，我们已经开发了一种通用且有效的模板策略，用于合成具有可控中空壁的新的CNT系列，并探索了它们在LIB中的有希望的应用。CNT核与氮掺杂石墨烯壳之间形成的中空结构可以有效地用于锂的存储，作为LIB中的负极材料，可逆比容量为635 mAh g ^-1。有趣的是，中空结构还与硅结合在一起，以提供更高的930 mAh g ^-1的比容量。 具有良好的循环稳定性。