Greatly enhanced dielectric charge storage capabilities of layered polymer composites incorporated with low loading fractions of ultrathin amorphous iron phosphate nanosheets
文献类型：期刊论文
| 作者 | Zhang, Meiyu3; Shi, Zhicheng3; Zhang, Jifu3; Zhang K(张坤)2 ; Lei, Li3; Dastan, Davoud1; Dong, Bohua3
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| 刊名 | JOURNAL OF MATERIALS CHEMISTRY C
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| 出版日期 | 2021-07-06 |
| 页码 | 11 |
| ISSN号 | 2050-7526 |
| DOI | 10.1039/d1tc01974k |
| 通讯作者 | Shi, Zhicheng(zcshi@ouc.edu.cn) ; Dong, Bohua(dongbohua@ouc.edu.cn) |
| 英文摘要 | Two-dimensional nanomaterials are promising fillers for dielectric nanocomposites because of their high specific surface areas which can induce strong interfacial polarization and result in improved dielectric permittivity. In this work, ultrathin amorphous FePO4 nanosheets with a thickness of about 3.7 nm are successfully obtained using a one-step solvothermal method and are further dispersed into a P(VDF-HFP) matrix, forming FePO4/P(VDF-HFP) nanocomposites. Obviously enhanced dielectric permittivities are achieved owing to the strong interfacial polarization at the huge interfaces between the FePO4 nanosheets and the P(VDF-HFP) matrix. A greatly enhanced dielectric permittivity of 18.5@10 kHz, which is about 240% that of the P(VDF-HFP) matrix, is obtained in the composite with merely 2 wt% FePO4 nanosheets. Furthermore, bilayer paraelectric/ferroelectric composites, in which pure polyetherimide acts as the paraelectric layer and the FePO4/P(VDF-HFP) composite as the ferroelectric layer, are fabricated. It is found that, the synergistic effect between the two layers results in a substantially suppressed loss and elevated breakdown strengths, as well as obviously improved energy density and discharge efficiency in comparison with the single layer FePO4/P(VDF-HFP) composites. Consequently, a high energy density of 7.58 J cm(-3) and a high discharge efficiency of 81.6% are concurrently achieved in the bilayer composite with merely 0.5 wt% FePO4 nanosheets. The excellent dielectric energy storage performances make these composites promising candidates for advanced electrostatic capacitors. |
| 分类号 | 二类/Q1 |
| WOS关键词 | HIGH-ENERGY-DENSITY ; ULTRAHIGH DISCHARGE EFFICIENCY ; BREAKDOWN STRENGTH ; NANOCOMPOSITES ; POLYETHERIMIDE ; PERMITTIVITY ; POLARIZATION ; FABRICATION ; CONSTANT ; PROPERTY |
| 资助项目 | National Natural Science Foundation of China[51773187] ; Fundamental Research Funds for the Central Universities[201961060] |
| WOS研究方向 | Materials Science ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000678173500001 |
| 资助机构 | National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities |
| 其他责任者 | Shi, Zhicheng ; Dong, Bohua |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/87152]  |
| 专题 | 力学研究所_国家微重力实验室 |
| 作者单位 | 1.Georgia Inst Technol, Dept Mat Sci & Engn, Atlanta, GA 30332 USA 2.Chinese Acad Sci, Inst Mech, Natl Micrograv Lab, Key Lab Micrograv, Beijing 100190, Peoples R China; 3.Ocean Univ China, Sch Mat Sci & Engn, Qingdao 266100, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Zhang, Meiyu,Shi, Zhicheng,Zhang, Jifu,et al. Greatly enhanced dielectric charge storage capabilities of layered polymer composites incorporated with low loading fractions of ultrathin amorphous iron phosphate nanosheets[J]. JOURNAL OF MATERIALS CHEMISTRY C,2021:11. |
| APA | Zhang, Meiyu.,Shi, Zhicheng.,Zhang, Jifu.,张坤.,Lei, Li.,...&Dong, Bohua.(2021).Greatly enhanced dielectric charge storage capabilities of layered polymer composites incorporated with low loading fractions of ultrathin amorphous iron phosphate nanosheets.JOURNAL OF MATERIALS CHEMISTRY C,11. |
| MLA | Zhang, Meiyu,et al."Greatly enhanced dielectric charge storage capabilities of layered polymer composites incorporated with low loading fractions of ultrathin amorphous iron phosphate nanosheets".JOURNAL OF MATERIALS CHEMISTRY C (2021):11. |
入库方式： OAI收割
来源：力学研究所
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