期刊
ACS APPLIED MATERIALS & INTERFACES
卷 14, 期 8, 页码 10605-10615出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c19397
关键词
PEDOT:PSS; acid treatment; hot pressing; electrical conductivity; thermal conductivity
资金
- National Natural Science Foundation of China [51973109, 51521004, 51873105]
- Innovation Program of Shanghai Municipal Education Commission [2019-01-07-00-02-E00069]
- Center of Hydrogen Science of Shanghai Jiao Tong University
This paper investigates the effects of hot pressing on the electrical and thermal performance of acid-treated thick conducting polymer PEDOT:PSS films. The study reveals that hot pressing significantly enhances the electrical and thermal conductivity of the films, which can be attributed to the optimized morphology and microstructures. The hot-pressed PEDOT:PSS films show potential applications in flexible electronics and thermal management.
This paper studies the impact of hot pressing on the electrical and thermal performance of thick (thickness >5 mu m) conducting polymer poly(3,4-ethylene dioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) films after acid treatment. Thick conducting polymer films usually exhibit low electrical and thermal conductivities similar to bulk polymer because charge and heat carriers are easily scattered by the irregular arrangement of crystalline domains inside the polymer. In this work, the in-plane electrical conductivity of thick hot-pressed PEDOT:PSS film exceeded 1500 S/cm, and 50% enhancement was obtained in comparison with its nonhot-pressed counterparts. Its in-plane thermal conductivity reached as high as 1.11 W/mK (improved by almost 100% compared to acid-treated PEDOT:PSS films), which is comparable to that of some commercial thermal pads. Such electrical and thermal enhancement via the hot-pressing process is attributed to the optimized morphology and microstructures, which provide short paths for thermal and electrical transportation. We have also demonstrated that the hot-pressed PEDOT:PSS films could be potentially utilized as a flexible conductor and heat spreader for application in flexible electronics and thermal management, respectively. This study not only offers a new insight into the process-property relationship for conducting polymers but also further enables the use of PEDOT:PSS films with simultaneously improved electrical and thermal performance in practical applications, such as thermal management for organic electrodes in batteries, flexible electronics, soft robotics, and bioelectronics.
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