Giant Negative Thermopower Enabled by Bidirectionally Anchored Cations in Multifunctional Polymers

Chen, Bin; Zhang, Xu; Yang, Jing; Feng, Jiansong; Wang, Taihong

2023-05-01

10.1021/acsami.3c03143

ACS APPLIED MATERIALS & INTERFACES   影响因子和分区

1944-8244

1944-8252

The lack of high-quality ionic thermoelectric materials with negative thermopowers has stimulated scientists' broad research interest. The effective adjustment of the interaction between ions and a polymer network is an important way to achieve high-quality ion thermoelectric properties. Integrating different types of ion-polymer interactions into the same thermoelectric device seems to lead to unexpected gains. In this work, we propose a strategy for bidirectionally anchoring cations to synergistically generate a giant negative thermopower and high ionic conductivity. This is mainly achieved through synergistic ion-polymer coordination and Coulomb interactions. An ionic thermoelectric material was prepared by infiltrating a polycation electrolyte [poly(diallyldimethylammonium chloride)] with CuCl2 into the poly(vinyl alcohol)-chitosan aerogel. The confinement effect of copper-coordinated chitosan on cations, the repulsive property of the polycationic electrolyte on cations, and the unique chemical configuration of a transition metal chloride anion ([CuCl4]2-) are the fundamental guarantees for achieving a thermopower of -28.4 mV center dot K-1. Moreover, benefiting from the high charge density of the polycationic electrolyte, we obtain an ionic conductivity of 40.5 mS center dot cm-1. These findings show the application prospect of synergistic different types of ion-polymer interactions in designing multifunctional ionic thermoelectric materials.

ion thermoelectric ion-polymer interaction synergistic effect negative thermopower energy harvesting

SCI ; EI

英语

第一 ; 通讯

Guangdong Major Talent Project[2019CX01X014]

Science & Technology - Other Topics ; Materials Science

Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:000988539400001

AMER CHEMICAL SOC

20232314189339

Carrier concentration ; Chitosan ; Chlorine compounds ; Copper compounds ; Ionic conductivity ; Polyelectrolytes ; Polyvinyl alcohols ; Positive ions ; Thermoelectric equipment ; Thermoelectricity ; Transition metals

Energy Conversion Issues:525.5 ; Metallurgy and Metallography:531 ; Thermoelectric Energy:615.4 ; Electricity: Basic Concepts and Phenomena:701.1 ; Organic Compounds:804.1 ; Organic Polymers:815.1.1 ; Polymer Products:817.1

Web of Science

Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Guangdong, Peoples R China

Chen, Bin,Zhang, Xu,Yang, Jing,et al. Giant Negative Thermopower Enabled by Bidirectionally Anchored Cations in Multifunctional Polymers[J]. ACS APPLIED MATERIALS & INTERFACES,2023,15(20):24483-24493.

Chen, Bin,Zhang, Xu,Yang, Jing,Feng, Jiansong,&Wang, Taihong.(2023).Giant Negative Thermopower Enabled by Bidirectionally Anchored Cations in Multifunctional Polymers.ACS APPLIED MATERIALS & INTERFACES,15(20),24483-24493.

Chen, Bin,et al."Giant Negative Thermopower Enabled by Bidirectionally Anchored Cations in Multifunctional Polymers".ACS APPLIED MATERIALS & INTERFACES 15.20(2023):24483-24493.