利用简单的溶剂热法,以四水合乙酸锰为锰源、尿素为沉淀剂,在氧化石墨烯(GO)存在条件下,一步制得了球形碳酸锰与GO组成的前驱物.该前驱物在氮气氛围中于500℃煅烧4h,成功转化为由一氧化锰(MnO)微球与GO组成的复合材料MnO/GO.利用X射线衍射仪(XRD)和场发射扫描电镜(FESEM)分别对材料的物相和形貌进行了表征,并对材料的锂电性能进行了研究.结果表明:复合材料首次放电比容量为1 326.8 mA·h/g(0.1 Mg,0.01～3.00 V);在电流密度为0.2 A/g条件下,循环100次后材料的放电比容量仍能保持在626.5 mA· h/g.复合材料的电化学性能较单一MnO微球有显著提高.%The composite precursors consisting of spherical MnCO3 particles and graphene oxide (GO) were successfully synthesized with MnAc2·4H2O as Mn2+ resource in the presence of urea and graphene oxide(GO) by simple solvothermal method.After calcined at 500 ℃ for 4 h in N2 subsequently,the precursors converted into MnO/GO composites on a large scale.The composition and morphology of the materials were characterized with XRD and field emission scanning electron microscope (FESEM).The electrochemical energy storage properties of as-prepared MnO/GO composites were also investigated.It was found that the specific capacity of MnO/GO composites reached 1 326.8 mA·h/g at 0.1 A/g (0.01 ～3.00 V),based on the calculation from the first discharge curve.In addition,the specific capacity of the materials still maintained at 626.5 mA·h/g,after cycling for 100 times at 0.2 A/g.Compared with pristine MnO microspheres,the electrochemical properties of as-prepared MnO/GO composites showed enhanced electrochemical performances.
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