Metal sulfides with high capacity have been considered as candidates for efficient sodium-ion storage. However, their undesirable rate capability and fast capacity fading hinder their commercial applications. Herein, we prepared a platelet-like CuS material with twin crystals. The edges of the platelet are composed of single crystal structures, and the interior of platelet contains twin crystal structures. Due to its structural and compositional advantages, this platelet-like CuS material with twin crystal structures manifests superior rate performance (420 mA h g⁻¹ at 0.05 A g⁻¹ and 277 mA h g⁻¹ at 5 A g⁻¹) and excellent cycling stability without capacity decay after around 500 cycles at 2 A g⁻¹.

中文翻译：

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片状CuS浸渍有双晶体结构，用于高性能钠离子存储

高容量的金属硫化物已被认为是有效钠离子存储的候选者。但是，它们不希望的速率能力和快速的容量衰减阻碍了它们的商业应用。在此，我们制备了具有双晶的片状CuS材料。血小板的边缘由单晶结构组成，并且血小板的内部包含双晶结构。由于它的结构和组成的优点，这片状的CuS材料与双晶结构体现优异的倍率性能（420毫安汞柱^-1 0.05 A G ^-1和277毫安汞柱^-1在5 A G ^-1）和优异的循环在2 A g ^-1下经过约500次循环后，稳定性没有容量衰减。