Transition metal oxides gain considerable research attentions as potential anode materials for lithium ion batteries,but their applications are hindered due to their poor electronic conductivity,weak cycle stability a...Transition metal oxides gain considerable research attentions as potential anode materials for lithium ion batteries,but their applications are hindered due to their poor electronic conductivity,weak cycle stability and drastic volume change.Here,a NiO@graphene composite with a unique 3D conductive network structure is prepared through a simple strategy.When applied as anode material for Li-ion batteries,at 50 mA g^(−1),the NiO@graphene displays a high reversible capacity of 1366 mAh g^(−1) and a stable cyclability of 205 mAh g^(−1) after 500 cycles.Even at a high rate of 10 A g^(−1),it displays a favorable reversible capacity of 711 mAh g^(−1).Remarkably,when it recovers back to 0.05 A g^(−1),a reversible capacity of 1741 mAh g^(−1) is achieved.Thus,the NiO@graphene composite with 3D structure shows good application prospects as an alternative anode for advanced lithium ion batteries.展开更多
In this study,uniform Co_(3)O_(4) nanoparticles are prepared via a simple and facile hydrothermal synthesis without calcination treatment.When the Co_(3)O_(4)nanomaterials are investigated as anodes for lithium ion ba...In this study,uniform Co_(3)O_(4) nanoparticles are prepared via a simple and facile hydrothermal synthesis without calcination treatment.When the Co_(3)O_(4)nanomaterials are investigated as anodes for lithium ion batteries,a good electrochemical property is achieved.Particularly,the reversible capacity of the as-synthesized Co_(3)O_(4) nanoparticle has a significant growth from383 mAh g^(-1)of the initial cycle to 471 mAh g^(-1)of the 300 th cycle at 2 A g^(-1).Moreover,when it recovers to 50 mA g^(-1)after different current densities,a superior reversible capacity of 695 mAh g^(-1)can be reached.Such favorable electrochemical properties will make the as-obtained Co_(3)O_(4) have a good application prospect as anode material for lithium ion batteries.展开更多
基金supported by the Science&Technology Department of Sichuan Province(No.2019YJ0665)the Opening Project of Material Corrosion and Protection Key Laboratory of Sichuan Province(No.2020CL10)。
文摘Transition metal oxides gain considerable research attentions as potential anode materials for lithium ion batteries,but their applications are hindered due to their poor electronic conductivity,weak cycle stability and drastic volume change.Here,a NiO@graphene composite with a unique 3D conductive network structure is prepared through a simple strategy.When applied as anode material for Li-ion batteries,at 50 mA g^(−1),the NiO@graphene displays a high reversible capacity of 1366 mAh g^(−1) and a stable cyclability of 205 mAh g^(−1) after 500 cycles.Even at a high rate of 10 A g^(−1),it displays a favorable reversible capacity of 711 mAh g^(−1).Remarkably,when it recovers back to 0.05 A g^(−1),a reversible capacity of 1741 mAh g^(−1) is achieved.Thus,the NiO@graphene composite with 3D structure shows good application prospects as an alternative anode for advanced lithium ion batteries.
基金financially supported by the Science&Technology Depar tment of Sichuan Province(No.2019YJ0665)。
文摘In this study,uniform Co_(3)O_(4) nanoparticles are prepared via a simple and facile hydrothermal synthesis without calcination treatment.When the Co_(3)O_(4)nanomaterials are investigated as anodes for lithium ion batteries,a good electrochemical property is achieved.Particularly,the reversible capacity of the as-synthesized Co_(3)O_(4) nanoparticle has a significant growth from383 mAh g^(-1)of the initial cycle to 471 mAh g^(-1)of the 300 th cycle at 2 A g^(-1).Moreover,when it recovers to 50 mA g^(-1)after different current densities,a superior reversible capacity of 695 mAh g^(-1)can be reached.Such favorable electrochemical properties will make the as-obtained Co_(3)O_(4) have a good application prospect as anode material for lithium ion batteries.
