Tow nanosize powders of β Ni(OH) 2 and NiO were synthesized by solid state reaction of NiC 2O 4·2H 2O with NaOH and NiCl 2·6H 2O with NaOH respectively and characterized by XRD and SEM. Their electrochemica...Tow nanosize powders of β Ni(OH) 2 and NiO were synthesized by solid state reaction of NiC 2O 4·2H 2O with NaOH and NiCl 2·6H 2O with NaOH respectively and characterized by XRD and SEM. Their electrochemical properties were investigated. The results shown that the composite electrode materials composed of the two kinds of nano particles and zinc powder displayed excellent discharge property.展开更多
A simple strategy to prepare a hybrid of nanocomposites of anatase TiO2/graphene nanosheets （GNS） as anode materials for lithium-ion batteries was reported.The morphology and crystal structure were studied by X-ray ...A simple strategy to prepare a hybrid of nanocomposites of anatase TiO2/graphene nanosheets （GNS） as anode materials for lithium-ion batteries was reported.The morphology and crystal structure were studied by X-ray diffraction （XRD）,field emission scanning electron microscopy （FE-SEM） and transmission electron microscopy （TEM）.The electrochemical performance was evaluated by galvanostatic charge-lischarge tests and alternating current （AC） impedance spectroscopy.The results show that the TiO2/GNS electrode exhibit higher electrochemical performance than that of TiO2 electrode regardless of the rate.Even at 500 mA/g,the capacity of TiO2/GNS is 120.3 mAh/g,which is higher than that of TiO2 61.6 mAh/g.The high performance is attributed to the addition of graphene to improve electrical conductivity and reduce polarization.展开更多
文摘Tow nanosize powders of β Ni(OH) 2 and NiO were synthesized by solid state reaction of NiC 2O 4·2H 2O with NaOH and NiCl 2·6H 2O with NaOH respectively and characterized by XRD and SEM. Their electrochemical properties were investigated. The results shown that the composite electrode materials composed of the two kinds of nano particles and zinc powder displayed excellent discharge property.
基金Project(Y4110230)supported by Natural Science Foundation of Zhejiang Province,ChinaProject(51204146,51101140)supported by the National Natural Science Foundation of ChinaProject(2012M521197)supported by Postdoctoral Science Foundation of China
文摘A simple strategy to prepare a hybrid of nanocomposites of anatase TiO2/graphene nanosheets （GNS） as anode materials for lithium-ion batteries was reported.The morphology and crystal structure were studied by X-ray diffraction （XRD）,field emission scanning electron microscopy （FE-SEM） and transmission electron microscopy （TEM）.The electrochemical performance was evaluated by galvanostatic charge-lischarge tests and alternating current （AC） impedance spectroscopy.The results show that the TiO2/GNS electrode exhibit higher electrochemical performance than that of TiO2 electrode regardless of the rate.Even at 500 mA/g,the capacity of TiO2/GNS is 120.3 mAh/g,which is higher than that of TiO2 61.6 mAh/g.The high performance is attributed to the addition of graphene to improve electrical conductivity and reduce polarization.
