[논문]석유계 잔사유 기반 음극재 제조 및 그 전기화학적 특성

김대섭; 임채훈; 김석진; 이영석

doi:10.14478/ace.2022.1085

석유계 잔사유 기반 음극재 제조 및 그 전기화학적 특성
Fabrication and the Electrochemical Characteristics of Petroleum Residue-Based Anode Materials 원문보기

공업화학 = Applied chemistry for engineering, v.33 no.5, 2022년, pp.496 - 501

김대섭 (충남대학교 응용화학공학과) , 임채훈 (충남대학교 응용화학공학과) , 김석진 (충남대학교 응용화학공학과) , 이영석 (충남대학교 응용화학공학과)

초록
AI-Helper

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.

Abstract ▼ AI-Helper

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.

주제어

표/그림 (6)

그림 Figure 1. Molecular weight distribution of petroleum residues.
그림 Figure 2. Elemental contents of petroleum residues.
그림 Figure 3. XRD pattern of petroleum residue based anode materials.
표 Table 1. Elemental Analysis Result of Petroleum Residues
표 Table 2. XRD Patterns of the Petroleum Residue Based Anodes
그림 Figure 4. Raman spectrum of petroleum residue based anode materials.

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표제어: PCR

동의어: Packet Collision Rate

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용어 설명: PCR은 세균 특이성이 있는 primer를 이용하여 적은 수의 세균이 있을지라도 쉽게 검출할 수 있는 유용한 방법이며, 이를 이용하여 구강 내 치면세균막이나 타액에서 직접 세균을 검출할 수 있게 되었다[8].

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