青岛科技大学  English 
张忠华
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副教授 硕士生导师  

教师拼音名称:zhangzhonghua

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所在单位:新能源材料与器件教研室

学历:博士研究生

办公地点:材料学院楼215A

性别:男

联系方式:15092410550

学位:工学博士

职称:副教授

毕业院校:中国科学院大学

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材料科学与工程其他专业

材料学

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2023-09-15 2023 年度山东省优秀研究生导师

2022-12-30 2022年山东省优秀硕士学位论文指导教师

2022-03-01 2021年度校级先进工作者

2020-06-01 2019年度校级先进工作者

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Sandwich Structure of 3D Porous Carbon and Water-Pillared V2O5 Nanosheets for Superior Zinc-Ion Storage Properties

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摘要:Vanadium oxides are promising cathode materials for rechargeable aqueous zinc-ion batteries (RAZIBs). However, the self-agglomeration and poor ion/electron conductivity of vanadium oxides in the charge/discharge process usually lead to low capacity and capacity attenuation, which limits their commercial application. Herein, we report a facile and mass-production method for fabricating 3D porous carbon/water-pillared V2O5 nanosheet composites with sandwich structure (PC/V2O5 . nH(2)O), which can further reduce the preparation cost of vanadium-oxide-based cathodes. Moreover, the excellent structural characteristics of PC/V2O5 . nH(2)O not only effectively inhibits the aggregation and stacking of V2O5 . nH(2)O but also increases the contact area between the active substance and the electrolyte, which is conducive to the transport of zinc ions and improves the electrochemical performance of RAZIBs. The PC/V2O5 . nH(2)O cathode displays an excellent rate performance (325.3 mAh g(-1) at high current density 20 A g(-1)), a high specific discharge capacity of 415.4 mAh g(-1) at 0.5 A g(-1), an outstanding cyclic stability, and capacity retention (after 1000 cycles the capacity retention rate about 97.1 %). Ex situ XRD patterns reveal that the charge/discharge process of the PC/V2O5 . nH(2)O electrode undergoes a reversible intercalation and conversion process. The method used in this work provides an idea for large-scale synthesis of vanadium-based cathode materials for multivalent batteries.

卷号:8

期号:10

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崂山校区 - 山东省青岛市松岭路99号   
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