공업화학 (Applied Chemistry for Engineering)

  • 제33권5호
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  • Pages.496-501
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  • 2022
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  • 1225-0112(pISSN)
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  • 2288-4505(eISSN)
한국공업화학회 (The Korean Society of Industrial and Engineering Chemistry)
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석유계 잔사유 기반 음극재 제조 및 그 전기화학적 특성

Fabrication and the Electrochemical Characteristics of Petroleum Residue-Based Anode Materials

  • 김대섭 (충남대학교 응용화학공학과) ;
  • 임채훈 (충남대학교 응용화학공학과) ;
  • 김석진 (충남대학교 응용화학공학과) ;
  • 이영석 (충남대학교 응용화학공학과)
  • Kim, Daesup (Department of Applied Chemistry and Chemical Engineering, Chungnam National University) ;
  • Lim, Chaehun (Department of Applied Chemistry and Chemical Engineering, Chungnam National University) ;
  • Kim, Seokjin (Department of Applied Chemistry and Chemical Engineering, Chungnam National University) ;
  • Lee, Young-Seak (Department of Applied Chemistry and Chemical Engineering, Chungnam National University)
  • 투고 : 2022.08.04
  • 심사 : 2022.08.25
  • 발행 : 2022.10.10
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초록

본 연구에서는 석유 정제 부산물인 석유계 잔사유를 이용하여 리튬이차전지용 음극재를 제조하였다. 석유계 잔사유 중 열분해 연료유(pyrolysis fuel oil, PFO), 유동접촉분해 데칸트 오일(fluidized catalyst cracking-decant oil, FCC-DO), 감압잔사유(vacuum residue, VR)를 탄소 전구체로 사용하였다. MALDI-TOF, 원소분석(EA)을 통하여 석유계 잔사유의 물리화학적 특징을 확인하였고, 잔사유로부터 제조된 음극재는 XRD, Raman 등의 분석을 통해 그 구조적 특징을 평가하였다. VR은 PFO 및 FCC-DO에 비하여 광범위한 분자량 분포와 많은 양의 불순물을 함유하는 것을 확인할 수 있었고, PFO와 FCC-DO는 거의 유사한 물리화학적 특징을 나타내었다. XRD 분석결과로부터 탄화된 PFO와 FCC-DO는 유사한 d002값을 나타내었다. 그러나 Lc 및 La값에서는 FCC-DO가 PFO보다 더 발달된 층상구조를 갖는 것으로 확인되었다. 또한, 전기화학적 특성 평가에서는 FCC-DO가 가장 우수한 사이클 특성을 나타내었다. 이러한 석유계 잔사유의 물리화학적, 전기화학적 결과로 미루어 보아 FCC-DO가 PFO와 VR보다 더 우수한 리튬이차전지용 탄소 전구체인 것으로 사료된다.

In this study, an anode material for lithium secondary batteries was manufactured using petroleum-based residual oil, which is a petroleum refining by-product. Among petroleum-based residual oils, pyrolysis fuel oil (PFO), fluidized catalyst cracking-decant oil (FCC-DO), and vacuum residue (VR) were used as carbon precursors. The physicochemical characteristics of petroleum-based residual oil were confirmed through Matrix-assisted laser desorption/ionization Time-of-Flight (MALDI-TOF) and elemental analysis (EA), and the structural characteristics of anode materials manufactured from residual oil were evaluated using X-ray crystallography (XRD) and Raman spectroscopic techniques. VR was found to contain a wide range of molecular weight distributions and large amounts of impurities compared to PFO and FCC-DO, and PFO and FCC-DO exhibited almost similar physicochemical characteristics. From the XRD analysis results, carbonized PFO and FCC-DO showed similar d002 values. However, it was confirmed that FCC-DO had a more developed layered structure than PFO in Lc (Length of a and c axes in the crystal system) and La values. In addition, FCC-DO showed the best cycle characteristics in electrochemical characteristics evaluation. According to the physicochemical and electrochemical results of the petroleum-based residual oil, FCC-DO is a better carbon precursor for a lithium secondary battery than PFO and VR.

키워드

과제정보

본 연구는 산업통상자원부/한국산업기술평가관리원의 탄소산업기반조성사업(바인더 및 코팅용 피치를 활용한 음극재용 실리콘산화물 인조흑연 복합체 개발: 20006777)의 지원에 의하여 수행하였으며 이에 감사드립니다.

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