Ambient Temperature High‐Rate Lithium/Organosulfur Batteries

Visco, Steven J.; Liu, Miao; Jonghe, Lutgard C. De

doi:10.1149/1.2086627

Cited by 64 publications

(35 citation statements)

References 5 publications

(6 reference statements)

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“…However, they do have some glaring drawbacks, including heat issues, the presence of rare and toxic elements, and scale-up technical problems, which limit their practical applications. [1] In the past few years, organic cathode materials including conducting polymers, [2][3][4][5] organosulfur compounds, [6][7][8][9][10][11][12][13][14][15] carbonyl derivatives, [16][17][18][19][20][21][22][23][24] organic radical polymers, [25][26][27][28][29][30] and some other redox-active molecules [31][32][33][34][35][36][37] have been explored intensively. Organic compounds featuring versatile molecular designs and of the ferrocene and triphenylamine moieties are reversible after the first cycle.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Charge–Discharge Properties of Organometallic Copolymers of Ferrocene and Triphenylamine as Cathode Active Materials for Organic‐Battery Applications

et al. 2016

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Abstract:Two new organometallic copolymers (PVFVM1 and PVFVM1-1) bearing different molar ratios of ferrocene and triphenylamine pendants were successfully designed and synthesized as cathode active materials for organic-battery applications. Their structural and thermal characteristics were determined by 1 H NMR spectroscopy, Fourier transform infrared (FTIR) spectroscopy, size exclusion chromatography (SEC), and thermogravimetric analysis (TGA). Cyclic voltammograms of the as-prepared polymers show that the electrochemical reactions

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Section: Introductionmentioning

confidence: 99%

Synthesis and Charge–Discharge Properties of Organometallic Copolymers of Ferrocene and Triphenylamine as Cathode Active Materials for Organic‐Battery Applications

et al. 2016

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“…Although toxicity, safety, and resource availability are known problems with lithium transition-metal oxide, alternatives have been hardly reported except for conducting polymers and disulfide compounds. 6,7 Radical polymers are candidates for replacing lithium transition-metal oxide. 811 We call a polymer which has unpaired electrons a radical polymer.…”

mentioning

confidence: 99%

Organic Radical Battery Approaching Practical Use

Nakahara¹,

Oyaizu²,

Nishide³

2011

Chemistry Letters

271

221

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The electrochemical redox reactions of organic polymers bearing robust unpaired electrons were investigated to determine the applicability of these polymers to rechargeable batteries. Such an "organic radical battery" would be environmentally friendly and have high-power characteristics. This highlight review describes the performance of a battery using a nitroxyl radical polymer as the cathode active material. The electrontransfer mechanism and recent developments that should lead to the practical application of the organic radical battery are also described. Ç 1. IntroductionLithium-ion batteries are widely used power sources for portable electric devices such as cellular phones and laptop computers because of their high-energy density and long life. Application of these batteries is expanding to electric vehicles and domestic energy storage. 15 In these batteries, a lithium transition-metal oxide cathode and a graphite anode are used as energy storage electrodes. Since the lithium transition-metal oxide cathode comprises the main part of a lithium ion battery, the lithium transition-metal oxide mainly determines the battery's energy density and capacity. The lithium transition-metal oxide is charged/discharged electrochemically in accordance with deintercalation/intercalation of the lithium ions and oxidation/ reduction of the transition-metal ions. Although toxicity, safety, and resource availability are known problems with lithium transition-metal oxide, alternatives have been hardly reported except for conducting polymers and disulfide compounds. 6,7 Radical polymers are candidates for replacing lithium transition-metal oxide. 811 We call a polymer which has unpaired electrons a radical polymer. The disappearance of the unpaired electrons due to chemical bond formation can be suppressed by a precisely designed chemical structure through a combination of the resonance effect of the electrons and the sterically hindered effect of the substituent groups. Chemical groups such as nitroxyl, phenoxyl, and hydrazyl are robust structures with lessreactive unpaired electrons in the uncharged state. Radical polymers with alicyclic nitroxyl such as 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) and 2,2,5,5-tetramethylpyrrolidine-1-oxyl (PROXYL) in particular have been studied in detail.

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“…14, No. 4,2003 cycling the electrode between -0.6 V to 0.69 V, at 100 mV s -1 in a 0.5 mol L -1 H 2 SO 4 aqueous solution. After 30 cycles, the resulting voltammetric profile of poly(DMcT) is shown in Figure 1 (dashed line).…”

Section: The Effect Of Dmct and Copper Ion Adsorbed Onto The Carbon Fmentioning

confidence: 99%

“…[1][2][3][4][5][6][7][8][9][10][11][12][13][14] A series of compounds having -SH groups are thought to have a significant potential as energy storage materials, whereby energy exchange occurs according to a reversible polymerization-depolymerization process (2 SH ↔ S-S). 1,2 Among these compounds, 2,5-dimercapto-1,3,4-thiadiazole (DMcT) was first studied by Visco and co-workers 6 as an active cathode material for lithium secondary batteries.…”

Section: Introductionmentioning

confidence: 99%

Influence of the preparation procedure on the electrochemical properties of Pani(DMcT-Cu ion)/carbon fiber composites

Canobre

Biaggio

Rocha‐Filho

et al. 2003

J. Braz. Chem. Soc.

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As propriedades eletroquímicas de compósitos do tipo Pani(DMcT-íon Cu)/fibra de carbono, obtidos eletroquimicamente, são analisadas em função tanto do procedimento de preparação como do sal de cobre (CuCl 2 .2H 2 O ou CuSO 4 ) utilizado para a incorporação de íons Cu 2+ no compósito. Dois procedimentos foram utilizados: adicionando-se o sal de cobre diretamente ao eletrólito durante a eletropolimerização da polianilina (procedimento A), ou adsorvendo-se os íons cobre juntamente com o DMcT sobre a fibra de carbono antes da eletropolimerização (procedimento B). A estabilidade eletroquímica, as propriedades elétricas e a morfologia desses compósitos foram analisadas, por voltametria cíclica, espectroscopia de impedância eletroquímica e microscopia eletrônica de varredura, respectivamente.The electrochemical properties of Pani(DMcT-Cu ion)/carbon fiber composites, obtained by electrochemical means, are analysed as a function of the preparation procedure and the different copper salts (CuCl 2 .2H 2 O or CuSO 4 ) used as source of Cu 2+ ions to be incorporated into the Pani(DMcT)/carbon fiber composite. The composites were prepared according to two procedures: by adding the copper salt directly to the electrolyte during the polyaniline electrosynthesis (procedure A), or by allowing the copper ion to be physically adsorbed onto the carbon fiber prior to the polymer electroformation (procedure B). The electrochemical stability, electrical properties and morphology of the composites were analysed by cyclic voltammetry, electrochemical impedance spectroscopy and scanning electron microscopy, respectively.Keywords: polyaniline, carbon fiber, DMcT, composites, impedance spectroscopy IntroductionIn the recent past decades, the demand for rechargeable batteries has exploded due to the enormous increase in the variety and number of portable devices, especially cellular phones. At the same time, the need has increased for batteries that are smaller, lighter, with higher energy density and more environmentally benign. It is expected that this dependence on batteries as energy sources will become even greater in the future due to an increase in the number of miniaturized devices. Therefore development of novel electrode materials is currently demanded so as to increase the energy density of batteries for different applications, including those for electric vehicles and the load leveling of electric power consumption.Disulfide compounds have been recently proposed as alternative materials for high-energy cathodes in lithium batteries. 1-14 A series of compounds having -SH groups are thought to have a significant potential as energy storage materials, whereby energy exchange occurs according to a reversible polymerization-depolymerization process (2 SH ↔ S-S). 1,2 Among these compounds, 2,5-dimercapto-1,3,4-thiadiazole (DMcT) was first studied by Visco and co-workers 6 as an active cathode material for lithium secondary batteries. However, its redox reaction is too slow at room temperature. Thus, to improve the redox dynamics of DM...

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Ambient Temperature High‐Rate Lithium/Organosulfur Batteries

Cited by 64 publications

References 5 publications

Synthesis and Charge–Discharge Properties of Organometallic Copolymers of Ferrocene and Triphenylamine as Cathode Active Materials for Organic‐Battery Applications

Synthesis and Charge–Discharge Properties of Organometallic Copolymers of Ferrocene and Triphenylamine as Cathode Active Materials for Organic‐Battery Applications

Organic Radical Battery Approaching Practical Use

Influence of the preparation procedure on the electrochemical properties of Pani(DMcT-Cu ion)/carbon fiber composites

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Ambient Temperature High‐Rate Lithium/Organosulfur Batteries

Cited by 64 publications

References 5 publications

Synthesis and Charge–Discharge Properties of Organometallic Co­polymers of Ferrocene and Triphen­ylamine as Cathode Active Materials for Organic‐Battery Applications

Synthesis and Charge–Discharge Properties of Organometallic Co­polymers of Ferrocene and Triphen­ylamine as Cathode Active Materials for Organic‐Battery Applications

Organic Radical Battery Approaching Practical Use

Influence of the preparation procedure on the electrochemical properties of Pani(DMcT-Cu ion)/carbon fiber composites

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Synthesis and Charge–Discharge Properties of Organometallic Copolymers of Ferrocene and Triphenylamine as Cathode Active Materials for Organic‐Battery Applications

Synthesis and Charge–Discharge Properties of Organometallic Copolymers of Ferrocene and Triphenylamine as Cathode Active Materials for Organic‐Battery Applications