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首页> 外文期刊>RSC Advances >Fabrication of a reversible SnS2/RGO nanocomposite for high performance lithium storage
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Fabrication of a reversible SnS2/RGO nanocomposite for high performance lithium storage

机译：用于高性能锂储存的可逆SNS2 / RGO纳米复合材料的制备

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SnS _(2) /graphene (SnS _(2) /G) composites have been explored extensively as a promising candidate for Lithium Ion Battery (LIB) anodes in recent years. Previously, the SnS _(2) conversion/reduction step of the reaction mechanism is generally believed to be irreversible or only partially reversible, which severely underestimates the theoretical capacity of SnS _(2) . In this work, SnS _(2) nanoparticles have been successfully stacked on reduced graphene oxide (RGO) via a facile and effective solvothermal method using ethylene glycol as a chelant. The SnS _(2) /graphene nanocomposite retained many of the original 2D characteristics of the graphene nanosheets. As a result, Li ~(+) storage properties were significantly improved. The SnS _(2) /RGO nanocomposites show a higher storage capacity of 939.0 mA h g ~(?1) after 30 cycles at a current density of 0.1 A g ~(?1) , and a long-term cycle capacity of 615.5 mA h g ~(?1) even after 200 cycles at 1 A g ~(?1) . The superior cycling stability of the SnS _(2) /RGO electrode is attributed to greater reversibility in the initial conversion reaction, ascribed to the presence of the Sn nanoparticles.
机译：SNS _（2）/石墨烯（SNS _（2）/ g）复合材料已被广泛探讨，作为近年来锂离子电池（LIB）阳极的有希望的候选者。以前，通常认为反应机制的SNS _（2）转换/还原步骤是不可逆的或仅部分可逆的，这严重低估了SNS _（2）的理论能力。在这项工作中，SNS _（2）纳米颗粒通过使用乙二醇作为螯合剂的容易和有效的溶剂热方法成功地堆叠在氧化物氧化物（RGO）上。 SNS _（2）/石墨烯纳米复合材料保留了石墨烯纳米片的许多原始2D特性。结果，Li〜（+）储存性能显着改善。 SNS _（2）/ rgo纳米复合材料在30次循环的电流密度为0.1Ag〜（α1）后，较高的储存容量为939.0 mA Hg〜（α1），长期循环容量为615.5 mA Hg〜（？1）即使在1 a g〜（Δ1）的200周期后。 SNS _（2）/ RGO电极的优异循环稳定性归因于初始转化反应中的更大可逆性，归因于Sn纳米颗粒的存在。

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