Interrelation between structural and electrochemical properties of the cathode based on vanadium oxide for rechargeable batteries

Shembel, E. M.; Apostolova, R. D.; Nagirny, V.; Aurbach, Doron; Markovsky, Boris

doi:10.1016/s0378-7753(99)00206-2

Cited by 27 publications

(15 citation statements)

References 33 publications

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“…Lithium insertion into vanadium oxide thin films and other products has been investigated extensively, particularly from the point of view of their use as electrode materials in rechargeable lithium batteries [5][6][7][8]. Promising results have been reported for amorphous and low-crystallinity materials such as V 2 O 5 xerogels and aerogels [7], as well as for vanadate Li x+1 V 3 O 8 [9].…”

mentioning

confidence: 99%

Atomic Layer Structure of Vanadium Oxide Nanotubes Grown on Nanourchin Structures

O’Dwyer¹,

Lavayen²,

Newcomb³

et al. 2007

Electrochem. Solid-State Lett.

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mentioning

confidence: 99%

Atomic Layer Structure of Vanadium Oxide Nanotubes Grown on Nanourchin Structures

O’Dwyer¹,

Lavayen²,

Newcomb³

et al. 2007

Electrochem. Solid-State Lett.

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“…Cristais de óxido de vanádio (c-V 2 O 5 ) usados como materiais catódicos exibem baixa recarga e voltagem insatisfatória devido à mudança na cristalinidade (transições de fase irreversíveis) durante os ciclos de carga/descarga 80,81 . Atualmente, os géis de óxi-dos de vanádio porosos como V 2 O 5 , tanto "xerogel" como "aerogel", apresentam um alto grau de inserção de Li + , potencial e característi-cas de carga/descarga muito superiores às observadas em óxidos de metais cristalinos de composição similar [82][83][84] .…”

Section: Materiais Catódicos Materiais Inorgânicos: óXidos De Metais unclassified

Materiais para cátodos de baterias secundárias de lítio

Varela¹,

Huguenin²,

Malta³

et al. 2002

Quím. Nova

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Recebido em 21/12/00; aceito em 4/7/01 MATERIALS FOR CATHODES OF SECONDARY LITHIUM BATTERIES. In this work, cathodes employed in secondary lithium batteries are reviewed. These cathodes have great technologic and scientific importance, specifically, materials for cathodes as electronic conductor polymers (ECP), transition metal oxides (TMO) and nanocomposites of ECP/TMO. The use of a specific cathodic material is based in some intrinsic characteristics that improve the performance of the battery. Thus, some vantages and disvantages of these insertion compounds are discussed, as lithium insertion capacity, energy density, and the ciclability of these materials.Keywords: secondary lithium batteries; cathodic materials; transition metal oxides; electronic conducting polymers; nanocomposites. INTRODUÇÃOUma fonte eletroquímica de potência ou bateria pode ser definida como um dispositivo capaz de converter diretamente a energia liberada numa reação química em energia elétrica. As baterias apresentam basicamente duas funções principais, a primeira é agir como fontes portáteis de potência elétrica. A segunda, que tem crescido em importância nos últimos trinta anos, está baseada na habilidade de certos sistemas eletroquímicos de armazenar a energia suprida por uma fonte externa. Tais baterias são utilizadas, em veículos elé-tricos, fontes de emergência, como parte de um sistema de fornecimento de curta duração para demandas em pico e em conjunção com fontes renováveis de energia, como solar ou eólica, por exemplo.A primeira descrição de uma bateria eletroquímica foi feita pelo italiano Alessandro Volta em 1800. Tal "descoberta" representa o marco na história da eletroquímica e, particularmente, na história dos dispositivos denominados genericamente baterias. Desde então, um notável progresso tem sido feito na área de armazenamento eletroquímico de energia. Hoje, pode-se enumerar uma grande variedade de dispositivos englobados na categoria de baterias: células metal-ar, metal-hidreto metálico (Ni-HM), níquel-cádmio (Ni-Cd), células térmicas, íons-Lítio, entre outras.O mercado para dispositivos primários consiste basicamente na produção de baterias para aparelhos portáteis. As baterias secundá-rias ou recarregáveis representam maior interesse devido à grande demanda atual de aparelhos celulares e microcomputadores portá-teis. Em 1997, por exemplo, dos 34 bilhões de dólares movimentados com baterias, 24 foram destinados às baterias secundárias 1 .Graças à simplicidade e reversibilidade das reações eletroquímicas de inserção ou intercalação, a grande maioria dos dispositivos secundários que operam à temperatura ambiente é baseada nos chamados eletrodos de inserção. Como exemplos, têm-se os dispositivos secundários aquosos, como hidreto metálico/NiOOH ou Zn/MnO 2 , que envolvem a inserção de H + no hidreto metálico 2,3 ou MnO 2 4,5. Até mesmo o mecanismo de redução do eletrodo positivo das baterias de chumbo ácido, PbO 2 6,7 pode ser atribuído ao processo de inserção de H + 8 .Considerando-se a utilização de cátions metálicos...

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“…Because of these various properties, vanadium oxides are expected to have applications in optical-electrical switches [9,10], temperature and gas sensors [2,3,11], cathode materials for advanced lithium batteries [12][13][14][15], electrochromic devices [13,16,17], etc.…”

mentioning

confidence: 99%

“…As nanostructured materials, such as nanotubes, nanorods, and nanowires [18,19], which often exhibit unique physical and chemical properties that differ from their bulk materials, nanostructured vanadium oxides have attracted particular attention, and methods have been developed to synthesize nanostructured vanadium oxides, such as the solution method [20][21][22], sol-gel method [17,23,24], sol electrochemical deposition [13,14], thermal vapor transport method [25], etc.…”

mentioning

confidence: 99%

Oxidation phase growth diagram of vanadium oxides film fabricated by rapid thermal annealing

Tamura

Wang

et al. 2009

Front. Mater. Sci. China

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Thermal evaporation deposited vanadium oxide films were annealed in air by rapid thermal annealing (RTP). By adjusting the annealing temperature and time, a series of vanadium oxide films with various oxidation phases and surface morphologies were fabricated, and an oxidation phase growth diagram was established. It was observed that different oxidation phases appear at a limited and continuous annealing condition range, and the morphologic changes are related to the oxidation process.Keywords vanadium oxides (VO x ), rapid thermal annealing (RTA), phase growth diagram Vanadium oxides are widely studied nowadays due to their interesting properties such as in catalysis [1], chemical sensing [2,3], photoluminescence [4], thermochromism [5,6], metal-insulator transition [7-10], etc. Because of these various properties, vanadium oxides are expected to have applications in optical-electrical switches [9,10], temperature and gas sensors [2,3,11], cathode materials for advanced lithium batteries [12-15], electrochromic devices [13,16,17], etc. As nanostructured materials, such as nanotubes, nanorods, and nanowires [18,19], which often exhibit unique physical and chemical properties that differ from their bulk materials, nanostructured vanadium oxides have attracted particular attention, and methods have been developed to synthesize nanostructured vanadium oxides, such as the solution method [20-22], sol-gel method [17,23,24], sol electrochemical deposition [13,14], thermal vapor transport method [25], etc.Vanadium oxides contain many oxidation phases, such as VO, V 2 O 3 , VO 2 , V 6 O 13 , and V 2 O 5 . In most of the works mentioned above, the studies mainly focused on only one or two oxidation phases individually, and it was necessary to have more overall studies of these oxidation phases, e.g., the process, phenomenon, and rule of phase transition among these oxidation phases.In this letter, we report on the oxidation phase transitions among vanadium oxide (VO x ) nano films during rapid thermal annealing (RTP), and an oxidation phase growth diagram that gave the relationship between fabrication conditions and oxidation phases was established. Moreover, surface morphology changes during the oxidation phase transition were observed.Vanadium oxide film was as-deposited by thermal evaporation deposition method on a Si (100) substrate. The substrate was ultrasonically cleaned with acetone, ethanol and de-ionized water for 10 min in sequence respectively, and placed 20 mm below a pure vanadium piece (purity 99.99%, size 5 mm Â 50 mm Â 0.7 mm) whose ends were connected to two copper electrodes, respectively. When the vacuum level of the chamber reached 5Â10 -2 Torr (&6.67 Pa), a voltage of 1.5 V was applied to the two electrodes, and the current through the piece was examined to be 85 A. The vanadium sheet was thus heated up and evaporated rapidly in the rough vacuum, and after 15 min, a layer of vanadium oxide film was deposited on the silicon substrate. Then, the asdeposited sample was cut into pieces and annealed in ai...

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Interrelation between structural and electrochemical properties of the cathode based on vanadium oxide for rechargeable batteries

Cited by 27 publications

References 33 publications

Atomic Layer Structure of Vanadium Oxide Nanotubes Grown on Nanourchin Structures

Atomic Layer Structure of Vanadium Oxide Nanotubes Grown on Nanourchin Structures

Materiais para cátodos de baterias secundárias de lítio

Oxidation phase growth diagram of vanadium oxides film fabricated by rapid thermal annealing

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