摘要
采用水热法制备了不同Ag修饰量的Ag/MoO_2纳米复合材料,并利用浸渍法将其负载在多孔泡沫镍(Nickel foam,NF)上制备成Ag/MoO_2/NF无粘结剂型直接电极。在该电极中Ag/MoO_2纳米颗粒均匀地负载在泡沫镍上形成了三维网络结构,其中MoO_2纳米颗粒是由~10 nm的纳米晶组成。当Ag修饰量为5%时,Ag0.05/MoO_2/NF具有最佳的电化学性能:在0.1 C的电流密度下,首次放电比容量高达1180 m Ah/g,100次循环后仍保持805 m Ah/g;且当电流密度由2 C降低至0.1 C时,比容量由468 m Ah/g升高至820 m Ah/g,表现出优异的储锂性能。
Ag/Mo02nanocomposites with different Ag contents were synthesized by hydrothermal method,which were anchored on the porous Ni foam to prepare Ag/Mo02/NF as binder-free electrode via the dip-coating method.It was found that Ag/Mo02nanocomposites consisted of many-10nm nanocrystals were uniformly loaded on Ni foam with3D network structure.When the Ag content is5%,Ago05/Mo02/NF electrode has the optimal electrochemical properties.The initial discharge capacity is1180mAh/g at a current density of0.1C.It was worth noting that the discharge capacity still retains805mAh/g after100cycles,when the current density return to0.1C from2C(468mAh/g),Ago05/Mo02/NF electrode delivers a high capacity of820mAh/g,indicating excellent lithium storage performance.
作者
祁琰媛
郑申波
杨雪
周博
周洋
周静
QI Yan-yuan;ZHENG Shen-bo;YANG Xue;ZHOU Bo;ZHOU Yang;ZHOU Jing(Center for Materials Research and Analysis, Wuhan University of Technology, Wuhan 430070, China;State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China)
出处
《人工晶体学报》
CSCD
北大核心
2017年第10期1923-1929,共7页
Journal of Synthetic Crystals
基金
国家自然科学基金(51506155)
关键词
Mo02
水热法
Ag修饰
泡沫镍
锂离子电池
直接电极
Mo02
hydrothermal method
Ag modification
Ni foam
lithium ion battery
binder-free electrode
