• Title/Summary/Keyword: Lithium Reduction

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A Study on the Reaction Characteristics of Rare Earth Oxides with Lithium Oxide in LiCl Molten Salt (LiCl 용융염 중에서 희토류 산화물과 산화리튬의 반응특성에 관한 연구)

  • 오승철;박성빈;김상수;도재범;박성원
    • Proceedings of the Korean Radioactive Waste Society Conference
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    • 2003.11a
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    • pp.447-452
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    • 2003

  • We had clarified the reactions of the rare earth oxides($RE_2O_3$) with lithium oxide produced in lithium reduction process of oxide fuels. Oxides of scandium, yttrium, praseodymium, neodymium, samarium, europium, gadolinium, ytterbium and lutetium reacted with lithium oxide in the higher concentration than the respective certain critical concentration of lithium oxide and formed complex oxides($LiREO_2$). The critical lithium oxide concentrations for the formation of complex oxides of scandium, yttrium, praseodymium, neodymium, samarium, europium, gadolinium, ytterbium and lutetium oxide were respectively 0.1 wt%, 1.9 wt%, 5.3 wt%, 5.0 wt%, 3.0 wt%, 3.9 wt% 2.9 wt%, 2.6 wt% and 0.3 wt%. Cerium and lanthanum oxide did not react with lithium oxide. These complex oxides obtained from experiments have limited solubility in lithium chloride at $650^{\circ}C$.

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Recovery of Metallic Lithium by Room-Temperature Electrolysis: I. Effect of Electrode Materials (상온(常溫) 전해법(電解法)에 의한 리튬 금속(金屬)의 회수(回收): I. 전극물질(電極物質)의 영향(影響))

  • Lee, Jae-O;Park, Jesik;Lee, Churl Kyoung
    • Resources Recycling
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    • v.21 no.6
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    • pp.45-50
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    • 2012

  • The room-temperature electrodeposition of metallic lithium was investigated from ionic liquid, 1-methyl-1-propylpiperidinium bis(trifluoromethanesulfonyl)imide (PP13TFSI) with lithium bis (trifluoromethanesulfonyl)imide (LiTFSI) as a lithium source. Cyclic voltammograms on gold working electrode showed the possibility of the electrodeposition of metallic lithium, and the reduction current on a gold electrode was higher than the value on platinum and copper. The metallic lithium could be electrodeposited on the gold electrode under potentiostatic condition at -2.4 V (vs. Pt-QRE) and was confirmed by analytical techniques including XRD and SEM-EDS. The dendrite-typed electrodeposits were composed of a metallic lithium and a alloy with gold substrate. And any impurity could be detected except for trace oxygen introduced during handling for the analyses.

  • https://doi.org/10.7844/kirr.2012.21.6.45 인용 PDF KSCI

Lithium/Sulfur Secondary Batteries: A Review

  • Zhao, Xiaohui;Cheruvally, Gouri;Kim, Changhyeon;Cho, Kwon-Koo;Ahn, Hyo-Jun;Kim, Ki-Won;Ahn, Jou-Hyeon
    • Journal of Electrochemical Science and Technology
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    • v.7 no.2
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    • pp.97-114
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    • 2016

  • Lithium batteries based on elemental sulfur as the cathode-active material capture great attraction due to the high theoretical capacity, easy availability, low cost and non-toxicity of sulfur. Although lithium/sulfur (Li/S) primary cells were known much earlier, the interest in developing Li/S secondary batteries that can deliver high energy and high power was actively pursued since early 1990’s. A lot of technical challenges including the low conductivity of sulfur, dissolution of sulfur-reduction products in the electrolyte leading to their migration away from the cathode, and deposition of solid reaction products on cathode matrix had to be tackled to realize a high and stable performance from rechargeable Li/S cells. This article presents briefly an overview of the studies pertaining to the different aspects of Li/S batteries including those that deal with the sulfur electrode, electrolytes, lithium anode and configuration of the batteries.

  • https://doi.org/10.5229/JECST.2016.7.2.97 인용 PDF KSCI KPUBS HTML

Selective Reduction by Lithium Bis- or Tris(dialkylamino)aluminum Hydrides. VIII. Reaction of Lithium Tripiperidinoaluminum Hydride in Tetrahydrofuran with Selected Organic Compounds Containing Representative Functional Groups

  • 차진순;이재철;주영철
    • Bulletin of the Korean Chemical Society
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    • v.18 no.8
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    • pp.890-895
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    • 1997

  • The approximate rates and stoichiometry of the reaction of excess lithium tripiperidinoaluminum hydride (LTPDA), an alicyclic aminoaluminum hydride, with selected organic compounds containing representative functional groups under the standardized conditions (tetrahydrofuran, 25°) were examined in order to define the reducing characteristics of the reagent for selective reductions. The reducing ability of LTPDA was also compared with those of the parent lithium aluminum hydride (LAH) and lithium tris(diethylamino)aluminum hydride (LTDEA), a representative aliphatic aminoaluminum hydride. In general, the reactivity of LTPDA toward organic functionalities is weaker than LTDEA and much weaker than LAH. LTPDA shows a unique reducing characteristics. Thus, benzyl alcohol, phenol and thiols evolve a quantitative amount of hydrogen rapidly. The rate of hydrogen evolution of primary, secondary and tertiary alcohols is distinctive. LTPDA reduces aldehydes, ketones, esters, acid chlorides and epoxides readily to the corresponding alcohols. Quinones, such as p-benzoquinone and anthraquinone, are reduced to the corresponding diols without hydrogen evolution. Tertiary amides and nitriles are also reduced readily to the corresponding amines. The reagent reduces nitro compounds and azobenzene to the amine stages. Disulfides are reduced to thiols, and sulfoxides and sulfones are converted to sulfides. Additionally, the reagent appears to be a good partial reducing agent to convert primary carboxamides into the corresponding aldehydes.

  • https://doi.org/10.5012/bkcs.1997.18.8.890 인용 PDF