Interface‐Engineered High‐Performance Flexible Thermoelectric Films for Self‐Powered Health Monitoring
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Wiley
2026
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| _version_ | 1867017964392284160 |
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| author | Xiang Li Ping Wei Kunhao Chen Wantian Zhang Dongrui Liu Kefan Cai Beiquan Jia Didi Huo Wenyu Zhao Li‐Dong Zhao Yao Lu |
| author_facet | Xiang Li Ping Wei Kunhao Chen Wantian Zhang Dongrui Liu Kefan Cai Beiquan Jia Didi Huo Wenyu Zhao Li‐Dong Zhao Yao Lu Xiang Li Ping Wei Kunhao Chen Wantian Zhang Dongrui Liu Kefan Cai Beiquan Jia Didi Huo Wenyu Zhao Li‐Dong Zhao Yao Lu |
| collection | Wiley Open Access |
| contents | Interface‐Engineered High‐Performance Flexible Thermoelectric Films for Self‐Powered Health Monitoring Xiang Li Ping Wei Kunhao Chen Wantian Zhang Dongrui Liu Kefan Cai Beiquan Jia Didi Huo Wenyu Zhao Li‐Dong Zhao Yao Lu Advanced Materials ABSTRACT Harvesting low‐grade discrete heat through flexible thermoelectrics (TEs) offers a transformative route toward self‐powered wearable electronics, yet is hindered by the inherent trade‐off among electrical/thermal transport and flexibility, as well as lack of application‐driven co‐design between materials and devices. Herein, we counterintuitively incorporate an insulating polymer‐polyvinylpyrrolidone (PVP) into the flexible Ag 2 Se‐based matrix, leveraging its multifunctional interfacial effects to achieve carrier‐phonon decoupling. This yields a flexible TE film with record‐high power factor of 3328 ± 332 µW m −1 K −2 and a figure of merit ( ZT ) of 1.1 at 341 K. The high‐performance stems from the rational incorporation of PVP as a dual‐functional additive, which simultaneously promotes coherent grain boundaries and mitigates Fermi‐level pinning effect. The assembled flexible TE generator delivers a normalized power density of 81 W m −2 under a temperature gradient of 35 K. Moreover, a proof‐of‐concept TE‐cup that integrates physiological sensing and energy harvesting is demonstrated, which achieves 100%‐accurate user identification via thermal‐sensing signals and powers a physiological monitor using harvested energy (∼20 mV) through an ultra‐low‐power management circuit. Our work redefines the positive role of non‐conductive polymers in TE nanocomposites, establishes an effective strategy for structure‐property manipulation, and pioneers a self‐sustained platform for next‐generation healthcare monitoring. 10.1002/adma.72608 http://onlinelibrary.wiley.com/termsAndConditions#vor |
| doi_str_mv | 10.1002/adma.72608 |
| format | Artículo Open Access |
| id | wiley_oa_10_1002_adma_72608 |
| institution | Wiley Open Access |
| license_str_mv | http://onlinelibrary.wiley.com/termsAndConditions#vor |
| publishDate | 2026 |
| publisher | Wiley |
| record_format | wiley_oa |
| spellingShingle | Interface‐Engineered High‐Performance Flexible Thermoelectric Films for Self‐Powered Health Monitoring Xiang Li Ping Wei Kunhao Chen Wantian Zhang Dongrui Liu Kefan Cai Beiquan Jia Didi Huo Wenyu Zhao Li‐Dong Zhao Yao Lu Advanced Materials Interface‐Engineered High‐Performance Flexible Thermoelectric Films for Self‐Powered Health Monitoring Xiang Li Ping Wei Kunhao Chen Wantian Zhang Dongrui Liu Kefan Cai Beiquan Jia Didi Huo Wenyu Zhao Li‐Dong Zhao Yao Lu Advanced Materials ABSTRACT Harvesting low‐grade discrete heat through flexible thermoelectrics (TEs) offers a transformative route toward self‐powered wearable electronics, yet is hindered by the inherent trade‐off among electrical/thermal transport and flexibility, as well as lack of application‐driven co‐design between materials and devices. Herein, we counterintuitively incorporate an insulating polymer‐polyvinylpyrrolidone (PVP) into the flexible Ag 2 Se‐based matrix, leveraging its multifunctional interfacial effects to achieve carrier‐phonon decoupling. This yields a flexible TE film with record‐high power factor of 3328 ± 332 µW m −1 K −2 and a figure of merit ( ZT ) of 1.1 at 341 K. The high‐performance stems from the rational incorporation of PVP as a dual‐functional additive, which simultaneously promotes coherent grain boundaries and mitigates Fermi‐level pinning effect. The assembled flexible TE generator delivers a normalized power density of 81 W m −2 under a temperature gradient of 35 K. Moreover, a proof‐of‐concept TE‐cup that integrates physiological sensing and energy harvesting is demonstrated, which achieves 100%‐accurate user identification via thermal‐sensing signals and powers a physiological monitor using harvested energy (∼20 mV) through an ultra‐low‐power management circuit. Our work redefines the positive role of non‐conductive polymers in TE nanocomposites, establishes an effective strategy for structure‐property manipulation, and pioneers a self‐sustained platform for next‐generation healthcare monitoring. 10.1002/adma.72608 http://onlinelibrary.wiley.com/termsAndConditions#vor |
| title | Interface‐Engineered High‐Performance Flexible Thermoelectric Films for Self‐Powered Health Monitoring |
| topic | Advanced Materials |
| url | https://advanced.onlinelibrary.wiley.com/doi/10.1002/adma.72608 |