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졸-겔법을 이용한 리튬이온전지용 SnOx-Al2O3 음극활물질의 제조
방종민, 나병기 충북대학교 산업과학기술연구소 2010 산업과학기술연구 논문집 Vol.24 No.1
SnO2,-Al2O3, cointrosite material was manufactured for an anode material of lithium ion battery. Sol gel synthesis was used to make unifromly mixed composite material . The particles were coated with carbon to increase the conductivity and the cycle characteristics . TGA, XRD, SEM, XPS was used to analyze crystal stnictures and surface properties. The material was pasted on the copper sheet and assembled to the coin cell. The charge/discharge properties and the cycle characteristics were analyzed by battery cycler.
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졸-겔법을 이용한 리튬이온전지용 SnOx-Al2O3 음극활물질의 제조
방종민 ( Jong Min Bang ),나병기 ( Byung Ki Na ) 충북대학교 산업과학기술연구소 2010 산업과학기술연구 논문집 Vol.24 No.1
SnOx-Al2O3 composite material was manufactured for an anode material of lithium ion battery. Sol-gel synthesis was used to make unifromly mixed composite material. The particles were coated with carbon to increase the conductivity and the cycle characteristics. TGA, XRD, SEM, XPS was used to analyze crystal structures and surface properties. The material was pasted on the copper sheet and assembled to the coin cell. The charge/discharge properties and the cycle characteristics were analyzed by battery cycler.
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졸-겔법을 이용한 Titania-silica 혼합 음극활물질의 제조
방종민(Jong Min Bang),조영임(Young Im Cho),나병기(Byung-Ki Na) 한국청정기술학회 2010 청정기술 Vol.16 No.2
리튬이온전지의 음극활물질로서 titania-silica 혼합물을 얻기 위해 TiCl₂와 TEOS를 전구체로 사용하여 졸-겔법을 이용해 합성하였다. 졸-겔법을 이용하여 혼합물을 합성할 경우에 균일한 분포를 갖는 화합물을 제조할 수 있다. 마이크로파를 이용하여 혼합물을 열처리하여 새로운 물성을 갖는 화합물의 제조를 시도하였다. 합성한 화합물의 물성을 측정하기 위하여 화합물의 조성, 열처리 온도 및 마이크로파 처리등을 실험변수로 사용하였다. 특성 분석방법으로는 합성물질의 구조적 특성과 입자의 표면분석을 하기 위해 XRD(X-ray diffraction)와 SEM (scanning electron microscopy)과 전지 충 방전기를 사용하여 충 방전에 따르는 전지의 용량변화를 관찰하였다. Titania-silica composite materials were obtained by sol-gel method from TiCl₄ and TEOS precusors, and they were applied to anode materials of lithium ion battery. Uniformly distributed composite materials can be manufactured by sol-gel method. The composite materials were heat treated by microwave to obtain materials with new properties. The experimental variables were composition of the material, heat treatment temperature, and microwave exposure. The structure and surface properties of the materials were analyzed by XRD, SEM, and the electrochemical capacity was measured with charge/discharge cycler.
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졸겔법을 이용한 리튬이온전지용 SnO<sub>x</sub>-TiO<sub>2</sub> 음극활물질의 제조
방종민 ( Jong-min Bang ),나병기 ( Byung-ki Na ) 충북대학교 산업과학기술연구소 2023 산업과학기술연구 논문집 Vol.37 No.1
In order to use tin oxide as an anode active material for a lithium ion secondary battery, a tin composite oxide of SnO<sub>x</sub>-TiO<sub>2</sub> was prepared to use TiO<sub>2</sub> as a buffer material. In order to prepare the tin composite oxide, the sol-gel method was used, which had the disadvantage of low yield and the need for a separate drying time for the sample, but had the advantage of uniform distribution of particles. The obtained sample was subjected to heat treatment after mixing and pulverization. TGA analysis was performed to determine the heat treatment temperature. XRD and SEM analyzes were performed to determine the surface and crystallinity of the particles. The obtained samples were analyzed for cycle characteristics and charge/discharge characteristics using Maccor's series-4000 device for electrochemical performance evaluation.
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스피넬형 Li4Ti5O12 음극물질의 Al3+ 첨가에 의한 전기화학적 성능 변화
정충훈,이의경,방종민,이봉희,조병원,나병기 한국청정기술학회 2008 청정기술 Vol.14 No.3
The effect of the addition of Al3+ dopant on the electrochemical characteristics of Li4Ti5O12 was investigated. Li4Ti5O12 is known as a zero-strain material, and Li3.95Al0.15Ti4.9O12 has been manufactured by solid-state reaction with high energy ball milling (HEBM). The samples were heated at 800, 900 and 1000℃ in electric furnace. The structural and surface structures were measured by XRD (X-ray diffraction) and SEM (scanning electron microscopy). Cut-off voltage of charge/discharge cycles was 1.0~3.0 V to investigate reversible capacity, cycle stability and plateau voltage. The reversible capacity of Li3.95Al0.15Ti4.9O12 was 138 mAh/g. 본 연구에서는 첨가물이 전기화학적 성능에 미치는 효과를 알아보기 위해 실험변수로서 첨가물 Al3+를 사용하였다. Zero-strain 삽입 혼합물로 알려진 Li4Ti5O12에 Al3+가 첨가된 Li3.95Al0.15Ti4.9O12를 high energy ball milling (HEBM)을 사용하여 고상반응으로 제조한 후에, 800, 900, 1000℃에서 열처리하여 시료를 제조하였다. 합성물질의 구조적 특성과 입자의 표면분석을 하기 위해 XRD (X-ray diffraction)와 SEM (scanning electron microscopy)을 사용하였으며, 이때의 입자의 분포는 대략 0.2~0.6 μm 정도로 측정되었다. 충/방전 실험은 1.0~3.0 V에서 하였으며, 가역용량, 사이클 안정성, 평탄 전압 등을 알아보았다. Li3.95Al0.15Ti4.9O12의 충방전 용량은 138 mAh/g이었다.
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스피넬형 Li₄Ti₅O₁₂ 음극물질의 Al³⁺ 첨가에 의한 전기화학적 성능 변화
정충훈(Choong-Hoon Jeong),이의경(Eui-Kyung Lee),방종민(Jong-Min Bang),이봉희(Bong-Hee Lee),조병원(Byung-Won Cho),나병기(Byung-Ki Na) 한국청정기술학회 2008 청정기술 Vol.14 No.3
본 연구에서는 첨가물이 전기화학적 성능에 미치는 효과를 알아보기 위해 실험변수로서 첨가물 Al³?를 사용하였다. Zero-strain 삽입 혼합물로 알려진 Li₄Ti?O₁₂에 Al³?가 첨가된 Li3.95Al0.15Ti4.9O₁₂를 high energy ball milling (HEBM)을 사용하여 고상반응으로 제조한 후에, 800, 900, 1000℃에서 열처리하여 시료를 제조하였다. 합성물질의 구조적 특성과 입자의 표면분석을 하기 위해 XRD (X-ray diffraction)와 SEM (scanning electron microscopy)을 사용하였으며, 이때의 입자의 분포는 대략 0.2~0.6 ㎛ 정도로 측정되었다. 충/방전 실험은 1.0 ~ 3.0 V에서 하였으며, 가역용량, 사이클 안정성, 평탄 전압 등을 알아보았다. Li3.95Al0.15Ti4.9O₁₂의 충방전 용량은 138 ㎃h/g이었다. The effect of the addition of Al³? dopant on the electrochemical characteristics of Li₄Ti?O₁₂ was investigated. Li₄Ti?O₁₂ is known as a zero-strain material, and Li3.95Al0.15Ti4.9O₁₂ has been manufactured by solid-state reaction with high energy ball milling (HEBM). The samples were heated at 800, 900 and 1000℃ in electric furnace. The structural and surface structures were measured by XRD (X-ray diffraction) and SEM (scanning electron microscopy). Cut-off voltage of charge/discharge cycles was 1.0~ 3.0 V to investigate reversible capacity, cycle stability and plateau voltage. The reversible capacity of Li3.95Al0.15Ti4.9O₁₂ was 138 ㎃h/g.
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