Improvement of electrode performances of Mg2Ni by mechanical alloying

Han, Sang Soo; Lee, Hee Yong; Goo, Nam Hoon; Jeong, Woon Tae; Lee, Kyung Sub

doi:10.1016/s0925-8388(01)01654-1

Cited by 30 publications

(20 citation statements)

References 7 publications

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“…Alloying (e.g. partial substitution of Al, V, Zr and Ti for Mg) is another approach to improve the electrode characteristics of ball-milled Mg-Ni alloys [2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical properties of nanocrystalline Mg2Ni-type alloys prepared by mechanical alloying

Bliznakov

Drenchеv

Drenchev

et al. 2005

Journal of Alloys and Compounds

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“…Alloying (e.g. partial substitution of Al, V, Zr and Ti for Mg) is another approach to improve the electrode characteristics of ball-milled Mg-Ni alloys [2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical properties of nanocrystalline Mg2Ni-type alloys prepared by mechanical alloying

Bliznakov

Drenchеv

Drenchev

et al. 2005

Journal of Alloys and Compounds

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“…The electrodes prepared from the coated powders had higher electrode capacity because of the excellent electrical conductivity and electrocatalytic activity of graphite. The cyclic stability was also slightly improved compared with the bare ones because the graphite coating protected the Mg from oxidation [17]. Besides discharge capacity and cycle performance, rate capability is another important factor for batteries.…”

Section: Electrochemical Propertiesmentioning

confidence: 99%

Enhanced electrochemical properties of nonstoichiometric amorphous Mg2Ni1.3 electrodes

et al. 2005

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Nonstoichiometric amorphous Mg 2 Ni 1.3 alloys were synthesized by mechanically milling crystalline Mg 2 Ni alloy with Ni powders. In comparison with the stoichiometric material, the nonstoichiometric Mg 2 Ni 1.3 phase showed a higher discharge capacity because of the amorphization of the alloy. Surface modification with graphite was also carried out for further improvement of its electrode performance. The coated powders showed a better cyclic stability because the graphite protected the Mg from oxidation. The rate capability (RC) and discharge capacity of electrodes was also markedly improved with graphite coating due to the excellent electrical conductivity and electrocatalytic activity of graphite.

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“…Metallic Zr, as an element for absorbing hydrogen, tends to form an oxide passive film insoluble in 6 M KOH electrolyte, which prevents further corrosion of anodes [21]. This was evidenced in Mg-based alloys, in which the introduction of Zr could result in a remarkable amelioration of the cyclic life [21] and maximum discharge capacity [22].…”

Section: Introductionmentioning

confidence: 99%

Influence of Zr Addition on Structure and Performance of Rare Earth Mg-Based Alloys as Anodes in Ni/MH Battery

Qiu

Huang

Chu

et al. 2015

Metals

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Abstract:In this study, the substitution of Mg with Zr in La 0.7 Mg 0.3 (Ni 0.85 Co 0.15 ) 3.5 was carried out with the purpose of improving the electrochemical performances. The structural and hydrogen storage properties in both gas-solid reaction and the electrochemical system were systematically studied on La 0.7 (Mg 0.3−x Zr x )(Ni 0.85 Co 0.15 ) 3.5 (x = 0.05, 0.1, 0.2, 0.3) alloys. Each tested alloy is composed of LaNi 3 phase, LaNi 5 phase and ZrNi 3 phase with different phase abundances. The electrochemical studies indicated that all Zr-substituted anodes possessed a much higher cycling capacity retention than pristine La 0.7 Mg 0.3 (Ni 0.85 Co 0.15 ) 3.5 . However, the maximum discharge capacity was reduced with the increase of Zr content. The potential-step tests showed that the diffusion of hydrogen atoms inside the anodes was decelerated after the introduction of Zr.

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Improvement of electrode performances of Mg2Ni by mechanical alloying

Cited by 30 publications

References 7 publications

Electrochemical properties of nanocrystalline Mg2Ni-type alloys prepared by mechanical alloying

Electrochemical properties of nanocrystalline Mg2Ni-type alloys prepared by mechanical alloying

Enhanced electrochemical properties of nonstoichiometric amorphous Mg2Ni1.3 electrodes

Influence of Zr Addition on Structure and Performance of Rare Earth Mg-Based Alloys as Anodes in Ni/MH Battery

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