| Design and Construction of 3D Porous Na3V2(PO4)3/C as High Performance Cathode for Sodium Ion Batteries |
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| 作者姓名： | HoU Baoxiu MA Linlin ZANG Xiaohuan SHANG Ningzhao SONG Jianmin ZHAO Xiaoxian WANG Chun QI Jian WANG Jiangyan YU Ranbo |
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| 作者单位： | Department of Chemistry;Department of Physical Chemistry;State Key Laboratory of Biochemical Engineering;University of Chinese Academy of Sciences |
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| 基金项目： | This work was supported by the National Natural Science Foundation of China(Nos.51772294,51972306);the Natural Science Foundation of Hebei Province,China(No.B2019204009);the Youth Innovation Promotion Association of the Chinese Academy of Sciences(No.2017070). |
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| 摘 要： | An easy and delicate approach using cheap carbon source as conductive materials to construct 3D sequential porous structural Na3V2(PO4)3/C(NVP/C)with high performance for cathode materials of sodium ion battery is highly desired.In this paper,the NVP/C with 3D sequential porous structure is constructed by a delicate approach named as“cooking porridge”including evaporation and calcination stages.Especially,during evaporation,the viscosity of NVP/C precursor is optimized by controlling the adding quantity of citric acid,thus leading to a 3D sequential porous structure with a high specific surface area.Furthermore,the NVP/C with a 3D sequential porous structure enables the electrolyte to interior easily,providing more active sites for redox reaction and shortening the diffusion path of electron and sodium ion.Therefore,benefited from its unique structure,as cathode material of sodium ion batteries,the 3D sequential porous structural NVP/C exhibits high specific capacities(115.7,88.9 and 74.4 mA·h/g at current rates of 1,20 and 50 C,respectively)and excellent cycling stability(107.5 and 80.4 mA·h/g are remained at a current density of 1 C after 500 cycles and at a current density of 20 C after 2200 cycles,respectively).
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| 关 键 词： | Porous structure Na3V2(PO4)3@C Sodium ion battery Cathode material Energy storage |
| 收稿时间： | 2020-12-22 |
Design and Construction of 3D Porous Na3V2(PO4)3/C as High Performance Cathode for Sodium Ion Batteries |
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| HoU Baoxiu,MA Linlin,ZANG Xiaohuan,SHANG Ningzhao,SONG Jianmin,ZHAO Xiaoxian,WANG Chun,QI Jian,WANG Jiangyan,YU Ranbo.Design and Construction of 3D Porous Na3V2(PO4)3/C as High Performance Cathode for Sodium Ion Batteries[J].Chemical Research in Chinese University,2021,37(2):265-273. |
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| Authors: | HOU Baoxiu MA Linlin ZANG Xiaohuan SHANG Ningzhao SONG Jianmin ZHAO Xiaoxian WANG Chun QI Jian WANG Jiangyan YU Ranbo |
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| Institution: | 1. Department of Chemistry, College of Science, Hebei Agricultural University, Baoding 071001, P. R. China;2. Department of Physical Chemistry, School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. China;3. State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, P. R. China;4. University of Chinese Academy of Sciences, Beijing 100049, P. R. China |
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| Abstract: | An easy and delicate approach using cheap carbon source as conductive materials to construct 3D sequential porous structural Na3V2(PO4)3/C(NVP/C) with high performance for cathode materials of sodium ion battery is highly desired. In this paper, the NVP/C with 3D sequential porous structure is constructed by a delicate approach named as “cooking porridge” including eva-poration and calcination stages. Especially, during evaporation, the viscosity of NVP/C precursor is optimized by controlling the adding quantity of citric acid, thus leading to a 3D sequential porous structure with a high specific surface area. Furthermore, the NVP/C with a 3D sequential porous structure enables the electrolyte to interior easily, providing more active sites for redox reaction and shortening the diffusion path of electron and sodium ion. Therefore, benefited from its unique structure, as cathode material of sodium ion batteries, the 3D sequential porous structural NVP/C exhibits high specific capacities(115.7, 88.9 and 74.4 mA·h/g at current rates of 1, 20 and 50 C, respectively) and excellent cycling stability(107.5 and 80.4 mA·h/g are remained at a current density of 1 C after 500 cycles and at a current density of 20 C after 2200 cycles, respectively). |
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| Keywords: | Porous structure Na3V2(PO4)3@C Sodium ion battery Cathode material Energy storage |
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