Nanoelectrical investigation and electrochemical performance of nickel-oxide/carbon sphere hybrids through interface manipulation

JOURNAL OF COLLOID AND INTERFACE SCIENCE

卷:469

Article

Yang, Xiaogang^1,2  Zhang, Yan'ge^1,2  Wu, Guodong^1,2  Zhu, Congxu^1,2  Zou, Wei^1,2  Gao, Yuanhao^1,2  Tian, Jie³  Zheng, Zhi^1,2,4 

[1] Xuchang Univ, Key Lab Micronano Mat Energy Storage & Convers He, Xuchang 461000, Henan, Peoples R China

[2] Xuchang Univ, Inst Surface Micro & Nano Mat, Xuchang 461000, Henan, Peoples R China

[3] Univ Sci & Technol China, Engn & Mat Sci Expt Ctr, Mat Test & Anal Lab, Jinzhai Rd 96, Hefei 230026, Peoples R China

[4] Collaborat Innovat Ctr Nano Funct Mat & Applicat, Kaifeng 475000, Henan, Peoples R China

关键词: Metal oxides/carbon hybrids;    Interfaces;    Nanoelectrical conductivity;    Impedance;    Lithium ion battery;    Stability;   

DOI  :  10.1016/j.jcis.2016.02.031

来源: Elsevier

【 摘 要 】

Advanced hetero-nanostructured materials for electrochemical devices, such as Li-ion batteries (LiBs), dramatically depend on each functional component and their interfaces to transport and storage charges, where the bottleneck is the sluggish one in series. In this work, we prepare Ni(OH)(2)@C hybrids through a continuous feeding in reflux and followed by a hydrothermal treatment. The as-prepared Ni(OH)(2)@C can be further converted into NiO@C hybrids after thermal annealing. As a control, Ni(OH)(2)&C and NiO&C nanocomposites have also been prepared. Peakforce Tuna measurement shows the conductivity of the NiO@C hybrids is higher than that of NiO@C composites in nanoscale. To further investigate the quality of the interface, 100 charge/discharge cycles of the hybrids are performed in LiBs. The capacity retention of hybrid materials has significantly improved than the simple carbon composites. The enhancement of the electrochemical performance is attributed to the better electric conductivity and smaller charge transfer impedance and strong covalent interface between nickel species and carbon spheres obtained through the controlled seeded deposition. (C) 2016 Elsevier Inc. All rights reserved.

【 授权许可】

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