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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A conductive sulfur-hosting material involving ultrafine vanadium nitride nanoparticles for high-performance lithium-sulfur battery

关键字:POROUS CARBON; CATHODE; POLYSULFIDES; NITROGEN; AEROGELS

摘要:A three-dimensional nitrogen doped porous carbon/vanadium nitride nanoparticles (3DNPC/VN) as a sulfur-hosting material for lithium-sulfur battery has been successfully synthesized by a facile method. Within this method, the 3D nanoporous carbonaceous framework is obtained by a one-step carbonization of sodium citrate. The ultrafine VN nanoparticles with typical size of 5-10 nm are prepared by a common condition of 700 degrees C heat-treatment under flowing N-2, and they are uniformly dispersed in the pores of carbon skeleton, as shown in the TEM images. The VN nanoparticles here play important roles of enhancing electronic conductivity, anchoring polysulfides and catalyzing reaction reversion. At a rate of 1C, the 3DNPC/VN-S cathode exhibits a discharge specific capacity of 734 mAh g(-1) for the initial cycle and a reversible capacity of 615 mAh g(-1) after 300 cycles, achieving a high capacity retention rate of 83.8%. Even at a high rate of 8 C, the discharge capacity of the 3DNPC/VN-S cathode can still reach 687 mAh g(-1), indicating an excellent rate performance. Therefore, this novel strategy is effective on designing a high-performance lithium-sulfur battery. (C) 2019 Elsevier Ltd. All rights reserved.

卷号:331

期号:wu

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