Cathodic properties of a lithium-ion secondary battery using LiCoO2 prepared by a complex formation reaction

Jeong, Euh‐Duck; Won, Mi‐Sook; Shim, Yoon‐Bo

doi:10.1016/s0378-7753(97)02667-0

Cited by 42 publications

(15 citation statements)

References 22 publications

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“…The line in the low frequency was attributed to a Warburg impedance (CPE2), that is associate with the diffusion of hydrogen ion through the PVC-SR membrane. The complex impedance data which reported in Figure 4a were fitted by equivalent circuits using Z View2 program of Scribner Associates Inc [25]. Figure 4b showed the equivalent circuit of Figure 4a, all the PVC-SR membrane impedance result fitted by this equivalent circuit.…”

Section: Impedance Spectra Of Pvc-sr Membrane Coated Electrodementioning

confidence: 99%

Characterization of All Solid State Hydrogen Ion Selective Electrode Based on PVC-SR Hybrid Membranes

Piao

Yoon

Jeon

et al. 2003

Sensors

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Hydrogen ion selective membranes formulated with 3140 RTV silicone rubber (SR) in PVC were studied to extend the life time of solid state ion sensors through improved membrane adhesion. All solid state hydrogen ion selective electrodes were prepared by incorporation of tridodecyl amine (TDDA) as an ionophore, potassium tetrakis[3,5-bis(pchlorophenyl)borate (KTpClPB) as a lipophilic additive, bis(2-ethylhexyl)adipate (DOA) as a plasticizer. Their linear dynamic range was pH 2.0-11.0 and showed the near Nernstian slope of 55.1±0.2 mV/pH (r=0.999). The influences from alkali and alkaline earth metal ions were studied for the response of the final ISE membrane composition. Impedance spectroscopic data showed that the resistance was increased by increasing SR content in PVC. Brewster Angle Microscopy (BAM) image showed clear differences according to the SR compositions in PVC. Life time of the all solid state membrane electrode was extended to about 2 months by preparing the membrane with PVC and SR. The standard reference material from NIST (2181 HEPES Free acid and 2182 NaHEPESate) was tested for the ISE and it gave a good result.

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Section: Impedance Spectra Of Pvc-sr Membrane Coated Electrodementioning

confidence: 99%

Characterization of All Solid State Hydrogen Ion Selective Electrode Based on PVC-SR Hybrid Membranes

Piao

Yoon

Jeon

et al. 2003

Sensors

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“…The most used route is the solidstate reaction, however, a high temperature and a long heat treatment time are necessary to prepare LiCoO 2 (900 jC for 48 h) [6]. Other methods such as sol -gel process [7,8], complex formation reaction [9], spraydrying synthesis [10], hydrothermal condition [11] and mechanochemical synthesis [12] have been used to synthesize LiCoO 2 .…”

Section: Introductionmentioning

confidence: 99%

Structural and electrochemical properties of LiCoO2 prepared by combustion synthesis

Santiago

2003

Solid State Ionics

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LiCoO 2 powders were prepared by combustion synthesis, using metallic nitrates as the oxidant and metal sources and urea as fuel. A small amount of the LiCoO 2 phase was obtained directly from the combustion reaction, however, a heat treatment was necessary for the phase crystallization. The heat treatment was performed at the temperature range from 400 up to 700 jC for 12 h. The powders were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and specific surface area values were obtained by BET isotherms. Composite electrodes were prepared using a mixture of LiCoO 2 , carbon black and poly(vinylidene fluoride) (PVDF) in the 85:10:5% w/w ratio. The electrochemical behavior of these composites was evaluated in ethylene carbonate/dimethylcarbonate solution, using lithium perchlorate as supporting electrolyte. Cyclic voltammograms showed one reversible redox process at 4.0/3.85 V and one irreversible redox process at 3.3 V for the LiCoO 2 obtained after a post-heat treatment at 400 and 500 jC.Raman spectroscopy showed the possible presence of LiCoO 2 with cubic structure for the material obtained at 400 and 500 jC. This result is in agreement with X-ray data with structural refinement for the LiCoO 2 powders obtained at different temperatures using the Rietveld method. Data from this method showed the coexistence of cubic LiCoO 2 (spinel) and rhombohedral (layered) structures when LiCoO 2 was obtained at lower temperatures (400 and 500 jC). The single rhombohedral structure for LiCoO 2 was obtained after post-heat treatment at 600 jC. The maximum energy capacity in the first discharge was 136 mA g À 1 for the composite electrode based on LiCoO 2 obtained after heat treatment at 700 jC. D

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“…However, the toxicity and high cost of additives limited the use of applying a coating or incorporating the additives in LiCoO2. Alternatively, there is a number of other ways to enhance the performance, such as, synthesize LiCoO2 from its well-known precursor cobalt hydroxide/oxide [10][11][12][13] using methods such as sol-gel [14], spray-drying [15], and rotary evaporation method [16]. Recently, there were few reports on using both cobalt hydroxides such as Co(OH)2 and α-Co(OH)2 as negative electrodes for battery applications [17][18].…”

Section: Introductionmentioning

confidence: 99%

Hexagonal β-Co(OH)<sub>2</sub> Nanoparticle as a Precursor in a Solution-Processed LiCoO<sub>2</sub> and Its Electrochemical Properties

Samal¹,

Dahiya²,

Majumder³

et al. 2018

Preprint

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Crystalline β-cobalt hydroxide (β-Co(OH)2) of different morphologies have been successfully synthesized with the addition of sodium hydroxide to cobalt nitrate solution and aging in the mother liquor. The rate of NaOH addition, ranging from 0.1 mL/min to 10 mL/min, influences the surface morphology with the obtained storage capability of the respective electrode. Characterization of the β-Co(OH)2 was fully developed, including X-ray diffraction, scanning and transmission electron microscopy, and BET analyses. At a lower rate of NaOH addition, particles are like platelets, while for a higher rate (≥2 mL/min) grains are fused together forming a larger crystallite size. This result is supported by the X-ray diffraction structural analysis, where the phase evolution of (002) plane becomes distinct for the higher rate of NaOH addition. Lithium cobalt oxide (LiCoO2) was synthesized through oxidation from the as-prepared β-Co(OH)2 and LiOH. The electrochemical performance of as obtained LiCoO2 is investigated using charge-discharge and cyclic voltammetric studies. The precursor β-Co(OH)2 prepared at a lower rate of 0.1 mL/min in LiCoO2 demonstrated the best electrochemical performance of 155 mAh/g. After 50 cycles, the capacity retention rate was 67% compared with the first cycle. Finally, we have attempted to correlate the amount of the available OH- ions with the formation of platelets and the discharge capacity. This work has developed a methodology for the synthesis of LiCoO2 using β-Co(OH)2 in a facile chemical solution process.

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Cathodic properties of a lithium-ion secondary battery using LiCoO2 prepared by a complex formation reaction

Cited by 42 publications

References 22 publications

Characterization of All Solid State Hydrogen Ion Selective Electrode Based on PVC-SR Hybrid Membranes

Characterization of All Solid State Hydrogen Ion Selective Electrode Based on PVC-SR Hybrid Membranes

Structural and electrochemical properties of LiCoO2 prepared by combustion synthesis

Hexagonal β-Co(OH)<sub>2</sub> Nanoparticle as a Precursor in a Solution-Processed LiCoO<sub>2</sub> and Its Electrochemical Properties

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Cathodic properties of a lithium-ion secondary battery using LiCoO2 prepared by a complex formation reaction

Cited by 42 publications

References 22 publications

Characterization of All Solid State Hydrogen Ion Selective Electrode Based on PVC-SR Hybrid Membranes

Characterization of All Solid State Hydrogen Ion Selective Electrode Based on PVC-SR Hybrid Membranes

Structural and electrochemical properties of LiCoO2 prepared by combustion synthesis

Hexagonal &beta;-Co(OH)<sub>2</sub> Nanoparticle as a Precursor in a Solution-Processed LiCoO<sub>2</sub> and Its Electrochemical Properties

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Hexagonal β-Co(OH)<sub>2</sub> Nanoparticle as a Precursor in a Solution-Processed LiCoO<sub>2</sub> and Its Electrochemical Properties