journal article·2023-06

Ion Exchange Induced Efficient N‐Type Thermoelectrics in Solid‐State

Ying Zhou, Canglang Yao, Xiangxin Lin, Jiyeon Oh, Jinjin Tian, Wenze Yang, Yongjie He, Yunhui Ma, Ke Yang, Bin Ai, Kuan Sun, Zhengping Fu, Yalin Lu, Feng Li, Changduk Yang, Shanshan Chen

Advanced Functional Materials· Volume 33· Issue 26
Publisher page

Abstract

Abstract High‐performance n‐type solid‐state ionic thermoelectrics (SS i‐TEs) for low‐grade heat harvesting are highly desired and challenging. Here, the design and synthesis of an efficient n‐type mixed conductor via ion pair modulation is demonstrated, which consists of biguanide hydrochloride (MfmCl) and a poly(3,4‐ethylenedioxythiophene) (PEDOT): poly(styrenesulfonate) (PSS) polymeric complex in a solid film. Theoretical calculations and nano/microstructure characterization reveal that the binding preference of ion pairs offers energetically favorable ion exchange in the matrix, which induces not only tightly bound Mfm PSS species but also favorable anion diffusion channels. Consequently, an enhanced ionic conductivity of 1.40 S m−1 with a record highest negative thermopower of −46.97 mV K−1 is achieved for the n‐type mixed conductor thus far.
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Research context

OpenAlex topics: Advanced Thermoelectric Materials and Devices · Advanced Battery Materials and Technologies · Thermal Expansion and Ionic Conductivity

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

MOE Key Laboratory of Low‐grade Energy Utilization Technologies and Systems School of Energy & Power Engineering Chongqing University Chongqing 400044 China

Laboratory of Advanced Materials Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Fudan University 220 Handan Shanghai 200433 China

Chongqing Key Laboratory of Bio perception & Intelligent Information Processing School of Microelectronics and Communication Engineering Chongqing University Chongqing 400044 China

School of Energy and Chemical Engineering Perovtronics Research Center Low Dimensional Carbon Materials Center Ulsan National Institute of Science and Technology (UNIST) 50 UNIST‐gil, Ulju‐gun Ulsan 44919 South Korea

Chongqing Institute of Green and Intelligent Technology University of Chinese Academy of Sciences (UCAS Chongqing) Chinese Academy of Sciences Chongqing 400714 China

Anhui Laboratory of Advanced Photon Science and Technology University of Science and Technology of China (USTC) 96 Jinzhai Hefei Anhui 230026 China

Funding

Natural Science Foundation of Chongqing · Fundamental Research Funds for the Central Universities · Fudan University · National Natural Science Foundation of China

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