바나듐 유동 전지용 CNT 나노 유체 전해액에 관한 실험적 연구

국문 초록 (Abstract)

바나듐 산화/환원 유동 전지(Vanadium redox flow battery, VRFB)의 전기용량 및 수명 증가를 위한 방법으로 나노 유체를 적용한 VRFB 단일 셀 시스템을 실험적으로 연구하였다. 본 연구에 사용된 CNT 나노 유체는 1.6M VO<SUP>2+</SUP> 전해질과 4M H₂SO₄ 전해액의 전해질용액에 Multi-Wall Carbon Nano Tube(MWCNT)를 중량비율(0.05, 0.1, 0.2 wt%)로 첨가하여 단순한 방법을 통해 제조되었다. MWCNT의 구조와 정량적 분석을 위해 XRD와 Raman 분광법을 사용하였으며, 나노 유체의 전지 성능 평가를 위해 전지충/방전 사이클을 20번 시행하였으며, 에너지용량으로 일반전해액과 나노 유체 전해액을 비교하였다. 에너지 용량 및 평균 전압의 결과는 0.1 wt% ＞ 일반전해액 ＞ 0.05 wt% ＞ 0.2 wt%의 순서로 나타났으며, 0.1wt% 나노 유체의 에너지용량이 일반 전해액보다 0.2 Ah/L 높게 나타났다.

다국어 초록 (Multilingual Abstract)

A Vanadium redox flow battery (VRFB) single-cell system using a nanofluid was experimentally investigated to increase the energy capacity. The nanofluids used in this study were prepared and dispersed through a simple method of adding a multi-wall carbon nanotube (MWCNT) to an electrolyte solution, which consisted of a 1.6 M VO₂ an electrolyte and a 4 M H₂SO₄ electrolyte. The weight ratios of these solution components were 0.05, 0.1, and 0.2 wt%, respectively. XRD and Raman spectroscopy were used for the structural and quantitative analysis of the MWCNT. For the electrochemical analysis of the nanofluids, 20 charge/discharge cycles were carried out and compared with the general electrolyte for determining the energy capacity. The energy capacity and average voltage results were on the order of 0.1 wt% ＞ general electrolyte ＞ 0.05 wt% ＞ 0.2 wt%. The energy capacity of a 0.1 wt% nanofluid was 0.2 Ah/L higher than a pristine electrolyte.

목차 (Table of Contents)

• 초록
• Abstract
• 1. 서론
• 2. 실험
• 3. 결과 및 토론
• 4. 결론
• 참고문헌(References)

참고문헌 (Reference)

1 심성흠, "충전 전압 특성을 이용한 리튬 이온 배터리의 잔존 수명 예측" 대한기계학회 37 (37): 313-322, 2013

2 유석범, "전기 자동차용 리튬이온전지 개발을 위한 수치해석" 대한기계학회 35 (35): 649-656, 2011

3 김수일, "리튬 이차전지의 양극 내부 이온 확산 및 상변화 특성 연구" 대한기계학회 37 (37): 665-667, 2013

4 Skyllas-Kazacos, M., "The Vanadium Redox Battery for Emergency Back-up Applications" 463-471, 1997

5 Li, W, "The Electrochemical Catalytic Activity of Single-walled Carbon Nanotubes Towards VO2+/VO2+ and V3+/V2+Redox Pairs for an All Vanadium Redox Flow Battery" 79 : 102-108, 2012

6 Kim, K. J, "Superior Electrocatalytic Activity of a Robust Carbon-Felt Electrode with Oxygen-Rich Phosphate Groups for All-Vanadium Redox Flow Batteries" 9 : 1329-1339, 2016

7 Leadbetter, J., "Selection of Battery Technology to Support Grid-integrated Renewable Electricity" 216 : 376-386, 2012

8 Thaller, L. H., "Redox Flow Cell Energy Storage Systems"

9 Ulaganathan, M, "Recent Advancements in All-Vanadium Redox Flow Batteries" 3 : 1-22, 2016

10 Skyllas-Kazacos, M, "Progress in Flow Battery Research and Development" 158 : R55-R79, 2011

11 Chen, H, "Progress in Electrical Energy Storage System: A Critical Review" 19 : 291-312, 2009

12 Joerissen, L, "Possible Use of Vanadium Redox-flow Batteries for Energy Storage in Small Grids and Standalone Photovoltaic Systems" 127 : 98-104, 2004

13 Shao, Y, "Nitrogen-doped Mesoporous Carbon for Energy Storage in Vanadium Redox Flow Batteries" 195 : 4375-4379, 2010

14 Prokopius, P. R., "Model for Calculating Electrolyte Shunt Path Losses in Large Electrochemical Energy Conversion Systems"

15 Wang, W. H., "Investigation of Ir-modified Carbon Felt as the Positive Electrode of an All-vanadium Redox Flow Battery" 52 : 6755-6762, 2007

16 McDowall, J., "Integrating Energy Storage with Wind Power in Weak Electricity Grids" 162 : 959-964, 2006

17 Carta, J. A., "In Comprehensive Renewable Energy Vol. 2" Elsevier Ltd. 569-622, 2012

18 Wu, T, "Hydrothermal Ammoniated Treatment of PAN-graphite Felt for Vanadium Redox Flow Battery" 16 : 579-585, 2012

19 Wade, N. S, "Evaluating the Benefits of an Electrical Energy Storage System in a Future Smart Grid" 38 : 7180-7188, 2010

20 Dell, R. M., "Energy Storage – a Key Technology for Global Energy Sustainability" 100 : 2-17, 2001

21 Ge, B, "Energy Storage System-based Power Control for Grid-connected Wind Power Farm" 44 : 115-122, 2013

22 Yang, Z, "Electrochemical Energy Storage for Green Grid" 111 : 3577-3613, 2011

23 Dunn, B, "Electrical Energy Storage for the Grid: A Battery of Choices" 334 : 928-935, 2011

24 Skyllas-Kazakos, M., "Efficient Vanadium Redox Flow Cell" 134 : 2950-2953, 1987

25 Kear, G, "Development of the All-vanadium Redox Flow Battery for Energy Storage: a Review of Technological" 36 : 1105-1120, 2012

26 Bartolozzi, M., "Development of Redox Flow Batteries. A Historical Bibliography" 27 : 219-234, 1989

27 Rychcik, M, "Characteristics of a New All-vanadium Redox Flow Battery" 22 : 59-67, 1988

28 Skyllas-kazacos, M, "Characteristics and Performance of 1 kW UNSW Vanadium Redox Battery" 35 : 399-404, 1991

29 Nair, N. K. C., "Battery Energy Storage Systems: Assessment for Small-scale Renewable Energy Integration" 42 : 2124-2130, 2010

30 Wei, L, "A High-performance Carbon Nanoparticledecorated Graphite Felt Electrode for Vanadium Redox Flow Batteries" 176 : 74-79, 2016