Enhanced Thermal Stability and Conductivity of FeF3 Using Ni-Coated Carbon Composites: Application as High-Temperature Cathodes in Thermal Batteriesopen access
- Authors
- Choi, Ji-Hyeok; Kim, Su Hyeong; Kang, Ha Eun; Kim, Minu; Choi, Yusong; Yoon, Young Soo
- Issue Date
- Dec-2023
- Publisher
- MDPI
- Keywords
- thermal battery; FeF3; Ni/carbon composites; carbon network; thermal stability
- Citation
- NANOMATERIALS, v.13, no.24
- Journal Title
- NANOMATERIALS
- Volume
- 13
- Number
- 24
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/90054
- DOI
- 10.3390/nano13243089
- ISSN
- 2079-4991
2079-4991
- Abstract
- Cathode active materials and conductive additives for thermal batteries operating at high temperatures have attracted research interest, with a particular focus on compounds offering high thermal stability. Recently, FeF3 has been proposed as a candidate for high-voltage cathode materials; however, its commercialization is hindered by its low conductivity. In this study, conductive additives, such as Ni-coated carbon composites (multi-walled carbon nanotubes (MWCNTs) and carbon black (CB)), were utilized to enhance the thermal stability and conductivity of FeF3. The incorporation of metal-carbon conductive additives in the FeF3 composite increased the thermal stability by more than 10 wt.% and ensured high capacity upon conductivity enhancement. The FeF3@Ni/MWCB 15 wt.% composite containing 30 wt.% Ni exhibited a discharge capacity of similar to 86% of the theoretical capacity of 712 mAh/g. The use of Ni-coated carbon-based conductive additives will allow the application of FeF3 as an effective high-temperature cathode material for thermal batteries.
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