Entropy Reduced Charge Transport and Energy Loss in Interfacial Zones of Polymer Nanocomposites

doi:10.1109/TDEI.2021.009787

	Entropy Reduced Charge Transport and Energy Loss in Interfacial Zones of Polymer Nanocomposites
	Min, Daomin 1; Ji, Minzun 1; Li, Pengxin 1; Gao, Ziwei 1; Liu, Wenfeng 1; Li, Shengtao 1; Liu, Jie 2
刊名	IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
	2021-12-01
卷号	28 期号:6 页码:2011-2017
关键词	polymer nanocomposite interfacial zone entropy localized state Meyer-Neldel compensation
ISSN号	1070-9878
DOI	10.1109/TDEI.2021.009787
通讯作者	Min, Daomin()
英文摘要	Polymer nanocomposites have higher energy storage density, much lower conductivity, and energy loss than the polymer matrices. The excellent performance may be originated from the deep-level localized states introduced by the interfacial zones between nanofillers and polymer matrices. However, the essential relation between the deep-level localized states and the composition, architecture, and configuration of polymer chains is still not clear. We investigate the temperature dependences of electrical conductivities of three types of energy storage polymer nanocomposites and find that they all obey the Meyer-Neldel (MN) compensation rule and the prefactor has an exponential relationship with the MN energy. It is found that the kinetic energy of electrons in the extended states of nanocomposites is the MN energy, which is related to the excitation of electrons by optical phonons. We propose to redefine the energy of localized states by the energy of optical phonons and the entropy of molecular conformations. It is found that the shape parameter of localized state distribution is related to the optical phonons and controlled by the composition, structure, and configuration of polymer chains, while the density of localized states is determined by the conformation and aggregate structure. We propose an optical phonon and entropy activated charge transport model, and the obtained conductivity equation is consistent with the experimental results. The entropy of molecular conformations can be used as a key factor to tailor the conductivity and energy loss of polymer nanocomposites. It provides a new perspective to study how to improve the energy storage performance of polymer nanocomposites.
资助项目	National Natural Science Foundation of China[U1830131] ; National Natural Science Foundation of China[52077162] ; National Natural Science Foundation of China[11690041]
WOS关键词	MODEL ; BREAKDOWN
WOS研究方向	Engineering ; Physics
语种	英语
出版者	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
WOS记录号	WOS:000742182400028
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/142269]
专题	中国科学院近代物理研究所
通讯作者	Min, Daomin
作者单位	1.Xi An Jiao Tong Univ, State Key Lab Elect Insulat & Power Equipment, Xian, Shaanxi, Peoples R China 2.Chinese Acad Sci, Inst Modern Phys, Lanzhou, Peoples R China
推荐引用方式 GB/T 7714	Min, Daomin,Ji, Minzun,Li, Pengxin,et al. Entropy Reduced Charge Transport and Energy Loss in Interfacial Zones of Polymer Nanocomposites[J]. IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION,2021,28(6):2011-2017.
APA	Min, Daomin.,Ji, Minzun.,Li, Pengxin.,Gao, Ziwei.,Liu, Wenfeng.,...&Liu, Jie.(2021).Entropy Reduced Charge Transport and Energy Loss in Interfacial Zones of Polymer Nanocomposites.IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION,28(6),2011-2017.
MLA	Min, Daomin,et al."Entropy Reduced Charge Transport and Energy Loss in Interfacial Zones of Polymer Nanocomposites".IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION 28.6(2021):2011-2017.