CAJ | 학술논문

在不添加表面活性剂的水溶液体系中，采用水合肼作为还原剂制备得到具有八面体形貌的氧化亚铜/石墨烯复合材料。透射电镜分析表明：氧化亚铜颗粒与石墨烯在复合物中呈多层次分布，而且氧化亚铜一次颗粒很好地嵌入在石墨烯层间。相比于纯氧化亚铜，氧化亚铜/石墨烯复合材料作为锂离子电池负极材料的电化学性能得到了显著的改善。在100 mA/g的电流密度下循环50次后，氧化亚铜/石墨烯复合物的可逆比容量高达348.4 mA?h/g，同时，在不同倍率下(50,100,200,400,800 mA/g)循环60次后，其可恢复容量仍达305.8 mA?h/g。
재불첨가표면활성제적수용액체계중，채용수합정작위환원제제비득도구유팔면체형모적양화아동/석묵희복합재료。투사전경분석표명：양화아동과립여석묵희재복합물중정다층차분포，이차양화아동일차과립흔호지감입재석묵희층간。상비우순양화아동，양화아동/석묵희복합재료작위리리자전지부겁재료적전화학성능득도료현저적개선。재100 mA/g적전류밀도하순배50차후，양화아동/석묵희복합물적가역비용량고체348.4 mA?h/g，동시，재불동배솔하(50,100,200,400,800 mA/g)순배60차후，기가회복용량잉체305.8 mA?h/g。
A facile way was used to synthesize Cu2O/reduced graphene oxide (rGO) composites with octahedron-like morphology in aqueous solution without any surfactant. TEM images of the obtained Cu2O/rGOs reveal that the Cu2O particles and rGO distribute hierarchically and the primary Cu2O particles are encapsulated well in the graphene nanosheets. The electrochemical performance of Cu2O/rGOs is enhanced compared with bare Cu2O when they are employed as anode materials for lithium ion batteries. The Cu2O/rGO composites maintain a reversible capacity of 348.4 mA?h/g after 50 cycles at a current density of 100 mA/g. In addition, the composites retain 305.8 mA?h/g after 60 cycles at various current densities of 50, 100, 200, 400 and 800 mA/g.