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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Intercalation species regulation in layered vanadium oxide scaffolds enables long cycle life Mg-metal anodes

关键字:CATHODE; PERFORMANCE; POLYANILINE; INSERTION; LITHIUM

摘要:Magnesium-metal anode has received tremendous attention because of its rich resources, satisfied volumetric capacity and intrinsic safety. Three-dimensional scaffolds can homogenize the electrodeposition of Mg and elongate its lifespan, yet the lack of reasonable design strategies seriously hinders their practical implementation. Herein, as a proof-of-concept, a conjugated polyaniline intercalation strategy is employed to expand the inter -layer of V2O5 nanosheets-assembling scaffolds, which display elongated cycle life and reduced Mg stripping/ plating overpotentials. The underlying contributions of polyaniline intercalation are revealed to be the accel-eration of the Mg-ions diffusion kinetics, the introduction of additional active sites by partial Mg-ions pre -insertion and the improved magnesiophilic property, all of which facilitate the subsequent uniform electrode -position of Mg with boosted electrochemical kinetics. In contrast, V2O5 scaffolds without any intercalant or with water/polyaniline co-intercalation show inferior Mg stripping/plating reversibility and unsatisfied lifespan due to the non-uniform Mg electrodeposition or the passivation of Mg metal anodes by the escaping water molecules. Moreover, this facile conjugated polymer intercalation strategy is demonstrated to be applicable to other promising metal-anode chemistries.

卷号:466

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