CAJ | 학술논문

采用溶剂热反应并经在氮气中煅烧的方法制备出不同形貌的 Fe 3 O 4/ C 纳米复合物。无需表面活性剂或模板剂,仅通过调控反应物的浓度,合成出花状、纳米片状、空心球形结构3种纳米结构,并对不同形貌的形成机理进行探讨。此外,三种不同形貌样品的电化学结果表明,花状样品的电化学综合性能显著优于另外两种形貌,在5 C 的充放电电流下,其可逆比容量能达到227 mAh/ g,而空心球形、纳米片状结构样品的容量则分别为45、10 mAh/ g。
채용용제열반응병경재담기중단소적방법제비출불동형모적 Fe 3 O 4/ C 납미복합물。무수표면활성제혹모판제,부통과조공반응물적농도,합성출화상、납미편상、공심구형결구3충납미결구,병대불동형모적형성궤리진행탐토。차외,삼충불동형모양품적전화학결과표명,화상양품적전화학종합성능현저우우령외량충형모,재5 C 적충방전전류하,기가역비용량능체도227 mAh/ g,이공심구형、납미편상결구양품적용량칙분별위45、10 mAh/ g。
Morphology-controlled Fe3 O4 / carbon nanocomposites were synthesized by a solvothermal reaction followed by calcina-tion under a nitrogen atmosphere. Flower-like structures, dispersed nanoflakes and hollow microspheres could be readily obtained by adjusting the concentrations of the reactants. Based on the time-dependent structure evolution, a possible mechanism for the forma-tion of the different morphologies under various conditions was discussed. The lithium storage properties of the different Fe bon composites were compared. The flower-like sample shows the best electrochemical performance with the highest specific capaci-ty of 227 mAh/ g at a current rate of 5 C while hollow microspheres and dispersed nanoflakes have specific capacities of only 45 and 10 mAh/ g, respectively.