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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >One-pot synthesis of tin chalcogenide-reduced graphene oxide-carbon nanotube nanocomposite as anode material for lithium-ion batteries
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One-pot synthesis of tin chalcogenide-reduced graphene oxide-carbon nanotube nanocomposite as anode material for lithium-ion batteries

机译：锂离子电池阳极材料的锡硫族化物 - 氧化物降氧化物 - 碳纳米纳米复合材料的单壶合成

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In this study, a ternary tin chalcogenide (TC)-reduced graphene oxide (RGO) carbon nanotube (CNT) nanocomposite was synthesized as a lithium-ion battery (LIB) anode by a simple one-step protocol. The nanocomposite was prepared through a hydrothermal method using tin chloride as the tin precursor, thiourea as the sulfur source and reducing agent, and GO-CNT hybrid as the carbonaceous nanostructure. The structure, morphology, and phase analysis of the synthesized nanocomposite powder were investigated using Raman spectroscopy, field-emission scanning electron microscopy (FESEM), and X-ray diffraction (XRD). The results show that GO is reduced while SnS and SnS2 nanosheets along with SnO2 nanoparticles are simultaneously formed within the RGO-CNT hybrid framework throughout the hydrothermal process. During the first lithiation-delithiation process, the discharge capacity and the columbic efficiency for the ternary TC-RGO-CNT nanocomposite electrode at a current density of 50 mA g(-1) are 1401 mA h g(-1). and 50%, respectively. The TC-RGO-CNT electrode gives an improved capacity of 197 mA h g(-1) at 500 mA g(-1) while the corresponding value for the bare TC, and binary TC-CNT and TC-RGO nanocomposite electrodes was only 5, 18, and 41 mA h g(-1), respectively. Meanwhile, the ternary nanocomposite anode indicates outstanding stability after 150 cycles with a reversible capacity of 100 mA h g(-1) at 500 mA g(-1). The excellent electrochemical performance of the ternary TC-RGO-CNT nanocomposite is ascribed to the synergistic effect of the high capacity of electrochemically-active TC nanostructures along with the large surface area, porous structure, and exceptional conductivity of the 3D RGO-CNT framework.
机译：在该研究中，通过简单的一步方案，通过简单的一步方案合成三烯锡硫属元素化物（Tc）碳氧化物（Rgo）碳纳米氧化物（Rgo）纳米氧化物（RGO）纳米核化合物作为锂离子电池（Lib）阳极。通过使用氯化锡作为锡前体，硫脲作为硫源和还原剂制备纳米复合材料，以及作为碳质纳米结构的Go-CNT杂交剂。使用拉曼光谱，现场排放扫描电子显微镜（FESEM）和X射线衍射（XRD）研究了合成纳米复合粉的结构，形态和相分析。结果表明，在整个水热过程的RGO-CNT杂交骨架内同时形成SNS和SNS2纳米液以及SNO2纳米颗粒的同时降低。在第一锂锂化工程期间，在50mA G（-1）的电流密度下的三元TC-RGO-CNT纳米复合电极的放电容量和牙牙效率为1401mA Hg（-1）。分别为50％。 TC-rgo-CNT电极在500mA G（-1）处提高了197 mA Hg（-1）的容量，而裸菌体Tc的相应值和二进制Tc-CNT和Tc-Rgo纳米复合电极仅为5 ，分别为18和41 mA hg（-1）。同时，三元纳米复合阳极表示在500mA g（-1）的可逆容量为100mA H（-1）的150次循环后的突出稳定性。三元TC-RGO-CNT纳米复合材料的优异电化学性能归因于电化学活性TC纳米结构的高容量以及3D RGO-CNT框架的大表面积，多孔结构和卓越导电性的协同效应。

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