With the increasing demand for electronic products, the amount of multilayer ceramic capacitor (MLCC) waste has also increased. Recycling technology has recently gained attention because it can simultaneously address raw material supply and waste disposal issues. However, research on recovering valuable metals from MLCCs and converting the recovered metals into high-value-added materials remains insufficient. Herein, we describe an electrospinning (E-spinning) process to recover nickel from MLCCs and modulate the morphology of the recovered nickel oxide particles. The nickel oxalate powder was recovered using organic acid leaching and precipitation. Nickel oxide nanoparticles were prepared via heat treatment and ultrasonic milling. A mixture of nickel oxide particles and polyvinylpyrrolidone (PVP) was used as the E-spinning solution. A PVP/NiO nanowire composite was fabricated via Espinning, and a nickel oxide nanowire with a network structure was manufactured through calcination. The nanowire diameters and morphologies are discussed based on the nickel oxide content in the E-spinning solution.

1. Introduction
2. Experimental
    2.1 MLCC로부터 습식공정을 이용한 니켈의 선택적 회수
    2.2 전기방사공정을 통한 니켈 소재화
    2.3 특성평가
3. Results and Discussion
4. Conclusion
Acknowledgement

• 신해인(단국대학교 에너지공학과) | Haein Shin (Department of Energy Engineering, Dankook University, Cheonan 31116, Republic of Korea)
• 배종원(단국대학교 에너지공학과) | Jongwon Bae (Department of Energy Engineering, Dankook University, Cheonan 31116, Republic of Korea)
• 강민수(단국대학교 에너지공학과) | Minsu Kang (Department of Energy Engineering, Dankook University, Cheonan 31116, Republic of Korea)
• 이근재(단국대학교 에너지공학과) | Kun-Jae Lee (Department of Energy Engineering, Dankook University, Cheonan 31116, Republic of Korea) Corresponding author