A case study of high-temperature polyetherimide film capacitor fabrication

Journal Article · Thu Oct 06 00:00:00 EDT 2022 · Materials Today Energy

DOI:https://doi.org/10.1016/j.mtener.2022.101167· OSTI ID:2417997

Tan, Daniel Q. ^[1]; Wu, Xudong ^[2]

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1. Guangdong Technion-Israel Institute of Technology, Shantou (China); Technion-Israel Institute of Technology, Haifa (Israel); OSTI
2. Guangdong Technion-Israel Institute of Technology, Shantou (China); Technion-Israel Institute of Technology, Haifa (Israel)

Capacitors, as the basic building block of power electronics and electrical systems, are the major constraint of the increasingly integrated power systems that require new capable polymer dielectric films operating at higher temperatures >125 °C. Despite tremendous research efforts on the lab scale, there remains a considerable barrier and knowledge basis for converting polymeric films to functioning capacitors desired in actual applications. Here, the authors tackled the polyetherimide (PEI) film scale up issues and developed various engineering processes for film de-wrinkling, optimal metallization, static elimination, and capacitor fabrication improvement. The authors discovered various fabrication challenges such as the electrostatic charge, metallization scheme, winding tension, and end electrode disconnects. To fabricate a high yield of PEI capacitor bobbins, it is necessary to utilize static eliminators (radioactive ionizers), moderately thick aluminum metallization (15–30 Ω/sq), and winding tension (60–100 g). It is also effective to evaluate capacitance, dielectric loss, equivalent series resistance, and thermal cycling stability of capacitors. This work sheds some light on converting PEI films and other polymeric films to capacitors on a scale up fabrication effort. The practical learning from film handling to capacitor fabrication in this work provided the necessary knowledge for manufacturing high-temperature polar film capacitors.

• Research Organization: General Electric Co., Boston, MA (United States)
• Sponsoring Organization: Guangdong Natural Science Foundation; USDOE Office of Energy Efficiency and Renewable Energy (EERE)
• Grant/Contract Number: EE0006433
• OSTI ID: 2417997
• Journal Information: Materials Today Energy, Journal Name: Materials Today Energy Journal Issue: C Vol. 30; ISSN 2468-6069
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
Chemistry
Energy & Fuels
Energy storage
Film scaleup
High heat
Materials Science
Melt extrusion
Polymer