Electrochemical investigation on nanoscale CoO as additive to the positive electrodes for Ni/MH rechargeable batteries

Wu, Jianbo; Tu, Jiangping; Zhang, W.K.; Huang, Hui

doi:10.1016/j.jallcom.2006.05.087

Cited by 9 publications

(2 citation statements)

References 14 publications

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“…have been widely adopted as an addition to the nickel hydroxide electrode in many commercial Ni-MH batteries [5][6][7][8]. Intrinsically, these divalent cobalt oxides have no conductivities, but they can be converted into conductive ␤-cobalt oxyhydroxide by electrochemical oxidation in the process of initial charging, forming an effective conductive network.…”

Section: Introductionmentioning

confidence: 99%

Regulation of the discharge reservoir of negative electrodes in Ni–MH batteries by using Ni(OH) (x= 2.10) and γ-CoOOH

Shangguan

Chang

Tang

et al. 2011

Journal of Power Sources

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a b s t r a c tIn this paper, a novel strategy to regulate the discharge reservoir of negative electrodes in Ni-MH batteries is introduced by using Ni(OH) x (x = 2.10) and ␥-CoOOH. The electrochemical measurements of these batteries demonstrate that the use of Ni(OH) x (x = 2.10) and ␥-CoOOH can not only successfully regulate the discharge reservoir of negative electrodes in Ni-MH batteries to an adequate quantity, but also effectively improve the electrochemical performance of the batteries. Compared with normal batteries, the in-house prepared batteries with a lower discharge reservoir exhibit an enhanced discharge capacity, improved high-rate discharge ability, higher discharge potential plateau and superior cycle stability. The effect of Ni(OH) x (x = 2.10) and ␥-CoOOH on the electrochemical performance of nickel electrode is also investigated by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The results suggest that the new method is simple and effective for cost reduction of Ni-MH batteries with improved electrochemical performance.

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Section: Introductionmentioning

confidence: 99%

Regulation of the discharge reservoir of negative electrodes in Ni–MH batteries by using Ni(OH) (x= 2.10) and γ-CoOOH

Shangguan

Chang

Tang

et al. 2011

Journal of Power Sources

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“…However, as for no hydrophilic group in big molecule F4, the moisture absorption performance of PTFE is poor, which leads to the increase of the ohm resistance. In addition, group F have great molecule polarization influencing the flexility of molecule chain, which make it difficult to the formation of electrode and deteriorate the high-rate discharge [8].…”

Section: Resultsmentioning

confidence: 99%

Optimizing on the Negative Electrode of Ni/MH Power Battery by Orthogonal Design

Zhong¹,

Zhu²,

Jian³

et al. 2009

MSF

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In this paper, the influences of different binders (Hydroxypropyl Methyl Cellulose (HPMC), Carboxymethyl Cellulose Sodium (CMC), Polytetrafluoroethylene (PTFE) and Styrene- butadiene Rubber (SBR)) on high-rate discharge performances at low temperature for the negative electrode of Ni/MH battery have been studied by orthogonal experimental design. Electrochemical measurements have been conducted to investigate the capacity, charge-discharge performance, cyclic voltammetry and electrochemical impedance characteristics. The surface morphology and chemical compositions have been investigated by SEM and EDS. Based on the range analysis, the primary and secondary influence factors as well as the optimization results were obtained. From the CV characteristic curves, the oxidization peaks and reduction peaks are not clearly shown, which indicates that the redox reaction does not occur clearly after binders added. The EIS experiments show that the deterioration of the voltage characteristic of the battery is due to drying out of the separator that increases the ohmic resistance (Rs ), and the decay of the discharge capacity is due to the passivity surface that increases the charge-transfer resistance (Rt) of the battery.

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Metal oxides in batteries

Wang

Zhang

et al. 2018

Metal Oxides in Energy Technologies

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Electrochemical investigation on nanoscale CoO as additive to the positive electrodes for Ni/MH rechargeable batteries

Cited by 9 publications

References 14 publications

Regulation of the discharge reservoir of negative electrodes in Ni–MH batteries by using Ni(OH) (x= 2.10) and γ-CoOOH

Regulation of the discharge reservoir of negative electrodes in Ni–MH batteries by using Ni(OH) (x= 2.10) and γ-CoOOH

Optimizing on the Negative Electrode of Ni/MH Power Battery by Orthogonal Design

Metal oxides in batteries

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