Abstract：
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.
摘要：
无机金属硫化物作为锂离子电池（LIB）中的负极材料已得到广泛的研究。然而,结晶有机杂化金属硫化物作为阳极材料在LIB中的应用相当罕见。此外,结晶有机杂化金属硫化物的纳米颗粒与导电材料的结合有望提高电化学锂存储性能。然而，由于难以收获结晶有机杂化金属硫化物的纳米粒子，迄今为止，这种方法从未尝试过。在这里，通过自上而下的方法制备了结晶有机杂化硫化镉锑（1,4-DABH2）Cd2Sb2S6（DCAS）的纳米颗粒，包括溶剂热合成的程序，球磨,和超声波粉碎。此后,通过冷冻干燥处理，将尺寸为~500nm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Sb2S3-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100mAg-1时的1075.6mAhg-1的高容量和出色的速率公差（5000mAg-1时的646.8mAhg-1）。此外,DCAS@GO可以在1000mAg-1下进行500次循环后提供705.6mAhg-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粒子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粒子嵌入GO纳米片中可以有效地提高电化学Li+离子存储性能。
