• JIA ZHU

      Articles written in Bulletin of Materials Science

    • One-step hydrothermal synthesis of flower-like CoS hierarchitectures for application in supercapacitors

      JIA ZHU LEI XIANG DONG XI YAZHOU ZHOU JUAN YANG

      More Details Abstract Fulltext PDF

      Flower-like CoS hierarchitectures were successfully synthesized through a hydrothermal route in the presence of ethylenediamine as ligand and structure-directing agent. The structure and morphology of the products were characterized by X-ray diffraction, transmission electron microscopy, field emission scanning electron microscopy and N$_2$ adsorption–desorption isotherm. Flower-like CoS hierarchitectures are constructed by two-dimensional CoS nanopedals interlaced and stacked with each other. When tested as electrode material for supercapacitors, the as-fabricated CoS delivers a specific capacitance of 357 F g$^{−1}$ at 0.5 A g$^{−1}$. After 2000 repetitive charge–discharge cycles, there is only 12.7% loss of the original specific capacitance. The results signify that the CoS supercapacitor possesses good electrochemical performances, suggesting its potential application in supercapacitor.

    • Cobalt sulphide/graphene aerogel nanocomposite with enhanced anode performance for lithium energy storage

      JIA ZHU YI ZHAO PEIXIANG NING SHENG TANG

      More Details Abstract Fulltext PDF

      Cobalt sulphide/graphene aerogel nanocomposite (CGA) is successfully fabricated via a one-pot hydrothermal approach aided with ethylenediamine. CoS nanoparticles constructed by nanoplates are uniformly anchored and well distributed on the loose graphene aerogel framework. Owing to a synergistic effect combining nanosized CoS with graphene aerogel advantages, CGA as an anode material for lithium energy storage exhibits high reversible capacity,superior long-cycle property and excellent high-rate capability. Prominently, CGA maintains a high capacity approaching $\sim$1100 mAh g$^{-1}$ after 200 cycles at 100 mA g$^{-1}$. Even at 1 A g$^{-1}$, CGA still delivers a capacity of 460 mAh g$^{-1}$. This approach can be readily applicable to prepare other graphene aerogel-based nanocomposites as anode materials.

  • Bulletin of Materials Science | News

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      Posted on October 12, 2020

      Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
      Chemical Sciences 2020

      Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
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      Posted on July 25, 2019

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