Enhancement of the electrochemical properties of rare earth-based alloy by doping with CoZnB alloy

Huang, Jing‐Mei; Qiu, Shujun; Chu, Hailiang; Zou, Yongjin; Xiang, Cuili; Zhang, Huanzhi; Xu, Fen; Sun, Lixian; Ouyang, Liuzhang; Zhou, Huaiying

doi:10.1016/j.ijhydene.2015.08.094

Cited by 13 publications

(4 citation statements)

References 30 publications

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“…For example, S C has an extremely high maximum discharge capacity of 844.6 mAh/g, which is much higher than that of conventional hydrogen storage alloys [1][2][3][4][5][6]. The maximum discharge capacity of S S and S N are 669.8 and 367.0 mAh/g, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…In the past few decades, extensive studies on hydrogen storage alloys (HMs) as anode materials of nickel-metal hydride (Ni-MH) batteries have been reported as being used in portable electronics due to their high specific capacity, good durability, and environmental friendliness [1][2][3][4][5][6]. Up to now, many kinds of metal hydrides have been developed; for instance, Mg-based alloys exhibit a maximum discharge capacity above 500 mAh/g, but the poor cycling ability limits widespread practical application [7].…”

Section: Introductionmentioning

confidence: 99%

“…In fact, the electrochemical reaction is based on the multi-electron redox reaction [12]. For instance, Co-based alloys as anodes in alkaline secondary batteries are primarily ascribed to the redox between Co and Co(OH) 2 [13][14][15][16][17][18][19]. Wang et al first reported that the Co-B alloy prepared via a chemical reduction method in an aqueous solution from bivalent cobalt sulfate has a reversible discharge capacity exceeding 300 mAh/g at 100 mA/g in an aqueous KOH solution [9], very close to those of conventional hydrogen storage alloys.…”

Section: Introductionmentioning

confidence: 99%

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The Co-B Amorphous Alloy: A High Capacity Anode Material for an Alkaline Rechargeable Battery

Qiu

Huang

Chu

et al. 2016

Metals

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Abstract:The Co-B amorphous alloys were prepared via a chemical reduction method by sodium borohydride, using three different cobalt salts (CoCl 2 ·6H 2 O, CoSO 4 ·7H 2 O, and Co(NO 3 ) 2 ·6H 2 O) as sources of cobalt. As anode materials in alkaline rechargeable batteries, the Co-B alloy prepared from CoCl 2 ·6H 2 O has a maximum specific discharge capacity of 844.6 mAh/g, and 306.4 mAh/g is retained even after 100 cycles at a discharge current of 100 mA/g. When Co(NO 3 ) 2 ·6H 2 O is used as a raw material, the formation of Co 3 (BO 3 ) 2 worsens the electrochemical properties of the sample, i.e., a maximum capacity of only 367.0 mAh/g.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Co-B Amorphous Alloy: A High Capacity Anode Material for an Alkaline Rechargeable Battery

Qiu

Huang

Chu

et al. 2016

Metals

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“…[19] The charge-discharge cycle was conducted in a tri-electrode cell containing a counter electrode (Ni(OH) 2 /NiOOH), a reference electrode (Hg/HgO), and a working electrode (the studied alloy) in an alkaline electrolyte (6 M KOH). The testing temperature was set at 30 °C.…”

Section: Introductionmentioning

confidence: 99%

Effect of Ball Milling on the Electrochemical Properties of La0.7(Mg0.25Ti0.05)(Ni0.85Co0.15)3.5 Hydrogen Storage Alloy

Qiu¹,

Ma²,

Wang³

et al. 2015

Proceedings of the 2015 International Symposium on Material, Energy and Environment Engineering

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The influence of ball milling on the structure and the electrochemical properties of La 0.7 (Mg 0.25 Ti 0.05 )(Ni 0.85 Co 0.15 ) 3.5 hydrogen storage alloy was investigated systematically. The XRD results show that the main phases of the alloy are a (LaMg)Ni 3 phase with the PuNi 3 -type rhombohedral structure and a LaNi 5 phase with the CaCu 5 -type hexagonal structure. The electrochemical studies show that the maximum discharge capacity and the high rate dischargeability decrease with the increase of milling time. Furthermore, the exchange current density first increases and then decreases with the increase of milling time from 0 (as-cast) to 120 min, consistent with the variation of the charge-transfer resistance from the electrochemical impedance spectra. However, the limiting current density first decreases from 2472.8 mA/g (as-cast) to 1719.6 mA/g (BM 30 min) and then increases to 2360.4 mA/g (BM 120 min).

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Improved Electrochemical Kinetic Performances of La-Mg-Ni-based Hydrogen Storage Alloy Modified by Ni-Polypyrrole Complex Surface Treatment

Yang

Wang

et al. 2019

Chem. Res. Chin. Univ.

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Enhancement of the electrochemical properties of rare earth-based alloy by doping with CoZnB alloy

Cited by 13 publications

References 30 publications

The Co-B Amorphous Alloy: A High Capacity Anode Material for an Alkaline Rechargeable Battery

The Co-B Amorphous Alloy: A High Capacity Anode Material for an Alkaline Rechargeable Battery

Effect of Ball Milling on the Electrochemical Properties of La0.7(Mg0.25Ti0.05)(Ni0.85Co0.15)3.5 Hydrogen Storage Alloy

Improved Electrochemical Kinetic Performances of La-Mg-Ni-based Hydrogen Storage Alloy Modified by Ni-Polypyrrole Complex Surface Treatment

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