Hierarchical architectures composed of nanomaterials in different forms are essential to improve the performance of lithium-ion battery (LIB) anodes. Here, we systematically studied the effects of hierarchical ZnO nanostructures on the electrochemical performance of LIBs. ZnO nanowire (NW) trunks were decorated with ZnO NWs or ZnO nanosheets (NSs) by successive hydrothermal synthesis to create hierarchical three-dimensional nanostructures. The branched ZnO NSs on the ZnO NW trunk exhibited a two-fold higher specific gravimetric capacity compared to ZnO NWs and branched ZnO NWs on ZnO NW trunks after 100 cycles of charging–discharging at 0.2C (197.4 mA g⁻¹). The improvement in battery anode performance is attributable to the increased interfacial area between the electrodes and electrolyte, and the void space of the branched NSs that facilitates lithium ion transport and volume changes during cycling.

中文翻译：

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用于锂离子电池阳极的用 ZnO 纳米片装饰的 ZnO 纳米线干线的分层组装

由不同形式的纳米材料组成的分层结构对于提高锂离子电池 (LIB) 阳极的性能至关重要。在这里，我们系统地研究了分级ZnO纳米结构对LIBs电化学性能的影响。ZnO 纳米线 (NW) 主干通过连续的水热合成用 ZnO NW 或 ZnO 纳米片 (NS) 进行装饰，以创建分层的三维纳米结构。在 0.2C（197.4 mA g ^-1）。电池负极性能的提高归因于电极和电解质之间的界面面积增加，以及在循环过程中促进锂离子传输和体积变化的支化 NS 的空隙空间。