Greatly enhanced dielectric charge storage capabilities of layered polymer composites incorporated with low loading fractions of ultrathin amorphous iron phosphate nanosheets

doi:10.1039/d1tc01974k

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	Greatly enhanced dielectric charge storage capabilities of layered polymer composites incorporated with low loading fractions of ultrathin amorphous iron phosphate nanosheets
	Zhang, Meiyu 1; Shi, Zhicheng 1; Zhang, Jifu 1; Zhang K(张坤)2 ; Lei, Li 1; Dastan, Davoud 3; Dong, Bohua 1
通讯作者	Shi, Zhicheng(zcshi@ouc.edu.cn) ; Dong, Bohua(dongbohua@ouc.edu.cn)
发表期刊	JOURNAL OF MATERIALS CHEMISTRY C
	2021-07-06
页码	11
ISSN	2050-7526
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.
DOI	10.1039/d1tc01974k
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000678173500001
关键词[WOS]	HIGH-ENERGY-DENSITY ; ULTRAHIGH DISCHARGE EFFICIENCY ; BREAKDOWN STRENGTH ; NANOCOMPOSITES ; POLYETHERIMIDE ; PERMITTIVITY ; POLARIZATION ; FABRICATION ; CONSTANT ; PROPERTY
WOS研究方向	Materials Science ; Physics
WOS类目	Materials Science, Multidisciplinary ; Physics, Applied
资助项目	National Natural Science Foundation of China[51773187] ; Fundamental Research Funds for the Central Universities[201961060]
项目资助者	National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities
论文分区	二类/Q1
力学所作者排名	3+
RpAuthor	Shi, Zhicheng ; Dong, Bohua
引用统计	被引频次：53[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/87153
专题	微重力重点实验室
作者单位	1.Ocean Univ China, Sch Mat Sci & Engn, Qingdao 266100, Peoples R China; 2.Chinese Acad Sci, Inst Mech, Natl Micrograv Lab, Key Lab Micrograv, Beijing 100190, Peoples R China; 3.Georgia Inst Technol, Dept Mat Sci & Engn, Atlanta, GA 30332 USA
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.

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