Understanding Piezoionic Effects in Chemo–Mechanical Energy Harvesting by Carbon Nanotube Yarn Twists

Author:

Kim Keon Jung1,Oh Seongjae23,Kim Youngoh45,Park Chae‐Lin26,Song Young‐Chul7,Lee Habeom8,Kim Eun Sung9,Suh Dongseok10,Lim Seong Chu3,Kim Hyun1112ORCID,Choi Joonmyung456ORCID,Kim Shi Hyeong26ORCID

Affiliation:

1. Semiconductor R&D Center Samsung Electronics Hwaseong 18448 Republic of Korea

2. Department of Advanced Textile R&D Korea Institute of Industrial Technology Ansan 15588 Republic of Korea

3. Department of Energy Science Sungkyunkwan University Suwon 16419 Republic of Korea

4. Department of Mechanical Design Engineering Hanyang University Seoul 04763 Republic of Korea

5. Department of Mechanical Engineering, BK21 FOUR ERICA‐ACE Center Hanyang University Ansan 15588 Republic of Korea

6. HYU‐KITECH Joint Department Hanyang University 222 Wangsimni‐ro, Seongdong‐gu Seoul 04763 Republic of Korea

7. Chemical Analysis Center Korea Research Institute of Chemical Technology Daejeon 34114 Republic of Korea

8. School of Mechanical Engineering Pusan National University Busan 46241 Republic of Korea

9. R&D Center A‐Tech System Co. Incheon 21312 Republic of Korea

10. Department of Physics Ewha Womans University Seoul 03760 Republic of Korea

11. Advanced Materials Division Korea Research Institute of Chemical Technology Daejeon 34114 Republic of Korea

12. Advanced Materials and Chemical Engineering, KRICT School Korea National University of Science and Technology Daejeon 34114 Republic of Korea

Abstract

AbstractStrategies for converting mechanical energy into electrical energy hold significant importance in diverse battery‐free and battery‐supported applications. Recent studies have demonstrated promising approaches involving the twisting of carbon nanotube yarns, which alter the intrinsic electrochemical capacitance during mechanical motion, thereby generating electrical energy in various aqueous environments. However, the fundamental mechanism of chemo–mechanical energy harvesters based on the nanoscale piezoionic effect, as well as the kinetics of both cations and anions within the system, remains to be clarified. In this study, experimental and computational approaches aimed at fundamentally understanding the piezoionic effect in nanoscale chemo–mechanical dynamics are presented. This phenomenon is analyzed using in situ Raman scattering, piezoelectrochemical impedance spectroscopy, and molecular dynamics simulations. The findings elucidate the collective contributions of cations and anions under mechanical energy inputs and demonstrate the impact of piezoionic kinetics on electrical energy outputs. By gaining a comprehensive understanding of the fundamental piezoionic effect in chemo–mechanical energy harvesting systems, significant advancements in energy sustainability across numerous practical applications are anticipated.

Funder

Ministry of Education

Ministry of Science and ICT, South Korea

Ewha Womans University

Korea Institute of Industrial Technology

Korea Research Institute of Chemical Technology

Publisher

Wiley

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