花状二硫化锡的储钠性能研究  

Sodium storage performance of flower-like SnS_(2)

作　　者：位帅洁 李帅辉[3] 赵志鹏 李丹[1,2] WEI Shuaijie;LI Shuaihui;ZHAO Zhipeng;LI Dan(College of Chemistry,Zhengzhou University,Zhengzhou 450001,China;Green Catalysis Center,Zhengzhou University,Zhengzhou 450001,China;School of Software,Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]郑州大学化学学院,郑州450001 [2]郑州大学绿色催化中心,郑州450001 [3]郑州大学软件学院,郑州450001

出　　处：《华电技术》2021年第7期37-41,共5页HUADIAN TECHNOLOGY

基　　金：国家自然科学基金青年基金资助项目(21701144)。

摘　　要：随着锂资源的消耗和碳中和背景下以可再生能源为主体的新型电力系统对大规模储能设备要求的提高,钠离子电池成为目前电化学能源工程研究的热点。以硫代乙酰胺为硫源,SnCl_(2)·2H_(2)O为锡源,通过温和的水热法制备得到了一系列具有纳米多孔片层和开放的结构框架的三维花状SnS_(2)。结合X射线衍射、扫描电镜、透射电镜、比表面分析、电化学性能测试等对SnS_(2)材料的形貌、结构、比表面积等物理性质和电化学性质进行了表征,结果显示:水热时间为4 h(4 h-SnS_(2))制备得到的SnS_(2)结晶性最好且形貌均一,组成花状结构的纳米片层较薄且具有较大的比表面积(196.39 m^(2)/g),有利于缩短Na+的传输路径、电解液充分接触以及电子在相界面间的传递和转移,从而提高SnS_(2)的储钠性能;4 h-SnS_(2)在1 A/g的电流密度下循环150次后放电比容量仍然能保持在526.8(mA·h)/g。为以SnS_(2)作为负极材料的钠离子电池的规模化制备以及钠离子电池的应用研究提供了基础数据。With the increasing consumption of lithium resources and the improvement of renewable energy-based modern electric system's requirements for large-scale energy storage equipment in the context of pursuing carbon neutrality,sodium ion batteries have become the hot spot of electrochemical energy engineering research at present.Using thioacetamide as sulfur source and SnCl_(2)·2H_(2)O as tin source,a series of three-dimensional flower-like SnS_(2) with nanoporous lamellae and open frameworks were prepared by a mild hydrothermal method.The physical and electrochemical properties such as morphology,structure and specific surface area of the flower-like SnS_(2) were characterized by X-ray diffraction,scanning electron microscopy,transmission electron microscopy,specific surface analysis and electrochemical performance test.The results show that the SnS_(2) prepared with a hydrothermal time of 4 h(4 h-SnS_(2))processes the best crystallinity and uniform morphology.The nano-lamellae composing the flower-like structure are thin and of a large specific surface area(196.39 m^(2)/g),which is beneficial for shortening the Na+transport path,and facilitating the full contact to electrolyte and the transfer of electrons between phase interfaces.Thus,the sodium storage performance of SnS_(2) can be improved.The specific discharge capacity of 4 h-SnS_(2) is maintained at 526.8(mA·h)/g after 150 cycles at a current density of 1 A/g.This work provides basic fundamental data for the large-scale preparation and research of sodium ion batteries with SnS_(2) as anode material.

关 键 词：碳中和 可再生能源 储能电池 钠离子电池 负极材料 二硫化锡 花状结构 倍率性能 循环性能 

分 类 号：TM912[电气工程—电力电子与电力传动] O646[理学—物理化学]