Inorganic metal sulfides have received extensive investigation as anode materials in lithium-ion batteries (LIBs). However, applications of crystalline organic hybrid metal sulfides as anode materials in LIBs are quite rare. In addition, combining the nanoparticles of crystalline organic hybrid metal sulfides with conductive materials is expected to enhance the electrochemical lithium storage performance. Nevertheless, due to the difficulty of harvesting the nanoparticles of crystalline organic hybrid metal sulfides, this approach has never been tried to date. Herein, nanoparticles of a crystalline organic hybrid cadmium antimony sulfide (1,4-DABH₂)Cd₂Sb₂S₆ (DCAS) were prepared by a top-down method, including the procedures of solvothermal synthesis, ball milling, and ultrasonic pulverization. Thereafter, the nanoparticles of DCAS with sizes of ∼500 nm were intercalated into graphene oxide nanosheets through a freeze-drying treatment and a DCAS@GO composite was obtained. Compared with the reported Sb₂S₃- and CdS-based composites, the DCAS@GO composite exhibited superior electrochemical Li⁺ ion storage performance, including a high capacity of 1075.6 mAh g^–1 at 100 mA g^–1 and exceptional rate tolerances (646.8 mAh g^–1 at 5000 mA g^–1). In addition, DCAS@GO can provide a high capacity of 705.6 mAh g^–1 after 500 cycles at 1000 mA g^–1. Our research offers a viable approach for preparing the nanoparticles of crystalline organic hybrid metal sulfides and proves that intercalating organic hybrid metal sulfide nanoparticles into GO nanosheets can efficiently boost the electrochemical Li⁺ ion storage performance.

中文翻译：

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将有机杂化硫化镉锑纳米颗粒嵌入氧化石墨烯纳米片中用于电化学锂存储


无机金属硫化物作为锂离子电池（LIB）的阳极材料已受到广泛的研究。然而，结晶有机杂化金属硫化物作为锂离子电池负极材料的应用相当罕见。此外，将结晶有机杂化金属硫化物纳米颗粒与导电材料相结合有望增强电化学储锂性能。然而，由于收获结晶有机杂化金属硫化物纳米颗粒的困难，迄今为止从未尝试过这种方法。在此，结晶有机杂化硫化镉锑纳米粒子(1,4-DABH ₂ )Cd ₂ Sb ₂ S ₆ ( DCAS）采用自上而下的方法制备，包括溶剂热合成、球磨和超声粉碎等过程。此后，通过冷冻干燥处理将尺寸为~500 nm的DCAS纳米颗粒嵌入氧化石墨烯纳米片中，得到DCAS@GO复合材料。与报道的Sb ₂ S ₃ 和CdS基复合材料相比，DCAS@GO复合材料表现出优异的电化学Li ⁺ 离子存储性能，包括高100 mA g ^–1 时的容量为 1075.6 mAh g ^–1 ，并且具有出色的倍率容差（5000 mA g ^–1 时为 646.8 mAh g ^–1 ） 。此外，DCAS@GO在1000 mA g ^–1 下循环500次后可提供705.6 mAh g ^–1 的高容量。我们的研究为制备结晶有机杂化金属硫化物纳米颗粒提供了一种可行的方法，并证明将有机杂化金属硫化物纳米颗粒嵌入GO纳米片中可以有效提高电化学锂 ⁺ 离子存储性能。