Scholarlink

<p>This study investigates the electrochemical properties of a compound with the AB3-type structure, specifically LaZr<sub>2</sub>Mn<sub>4</sub>Ni<sub>5</sub>. The maximum abundance of this phase, 39.69 wt%, is reached after 5&#xa0;h of alloying. Galvanostatic cycling is used to determine the discharge capacity for alloying durations ranging from 5 to 25&#xa0;h. The maximum capacity achieved ranges from 300 to 330 mAh/g. All the alloys demonstrate excellent electrochemical stability, even after 30 cycles. By using cyclic voltammetry, charge transfer coefficients and hydrogen diffusion coefficients are determined, with values ranging from 0.3 to 0.64 and from 6.03 10<sup>− 10</sup> to 15.26 10<sup>− 10</sup> cm<sup>2</sup>.s<sup>− 1</sup>, respectively. Compared to La-Mg-Ni AB<sub>3</sub>-type compounds, substituting Mg with Zr and Ni with Mn increases the diffusivity of hydrogen in the corresponding materials. The size of the LaZr<sub>2</sub>Mn<sub>4</sub>Ni<sub>5</sub> hydride particles involved in the electrochemical reaction, determined by the chronoamperometric method, ranges between 43 and 59&#xa0;μm.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Synthesis and electrochemical properties of AB3 type LaZr2Mn4Ni5-based alloys

  • 期刊论文

  • 发表日期：

    2026年3月19日

查看全文
  • Mouna Elghali,
  • Ines Sahli,
  • Marwa Ayari,
  • Mohieddine Abdellaoui

摘要

This study investigates the electrochemical properties of a compound with the AB3-type structure, specifically LaZr2Mn4Ni5. The maximum abundance of this phase, 39.69 wt%, is reached after 5 h of alloying. Galvanostatic cycling is used to determine the discharge capacity for alloying durations ranging from 5 to 25 h. The maximum capacity achieved ranges from 300 to 330 mAh/g. All the alloys demonstrate excellent electrochemical stability, even after 30 cycles. By using cyclic voltammetry, charge transfer coefficients and hydrogen diffusion coefficients are determined, with values ranging from 0.3 to 0.64 and from 6.03 10− 10 to 15.26 10− 10 cm2.s− 1, respectively. Compared to La-Mg-Ni AB3-type compounds, substituting Mg with Zr and Ni with Mn increases the diffusivity of hydrogen in the corresponding materials. The size of the LaZr2Mn4Ni5 hydride particles involved in the electrochemical reaction, determined by the chronoamperometric method, ranges between 43 and 59 μm.