材料导报
材料導報
재료도보
MATERIALS REVIEW
2014年
2期
25-29,33
,共6页
彭雯琦%戴豪%邓年进%卢照%蓝志强%郭进
彭雯琦%戴豪%鄧年進%盧照%藍誌彊%郭進
팽문기%대호%산년진%로조%람지강%곽진
La-Mg-Ni基合金%储氢性能%循环稳定性%放氢平台压%容量保持率%高倍率放电性能%氢扩散系数
La-Mg-Ni基閤金%儲氫性能%循環穩定性%放氫平檯壓%容量保持率%高倍率放電性能%氫擴散繫數
La-Mg-Ni기합금%저경성능%순배은정성%방경평태압%용량보지솔%고배솔방전성능%경확산계수
La-Mg-Ni-based alloy%hydrogen storage property%cyclic stability%hydrogen desorption plateau pressure%capacity retaining rate%high rate dischargeability%hydrogen diffusion coefficient
在氩气保护下,采用磁悬浮感应熔炼方法制备La0.7 Zr0.1 Mg0.2 Ni2.75 Co0.75-xFex (x=0,0.05,0.1,0.15,0.2)合金,并研究Fe取代Co对La0.7 Zr0.1 Mg0.2 Ni2.5 Co0.75-xFex(x=0,0.05,0.1,0.15,0.2)合金储氢性能及电化学性能的影响.结果表明:合金主要由LaNi5和La2 Ni7相组成,随着Fe含量的增加,LaNi5和La2 Ni7相的晶胞体积逐渐增大,且合金中依次出现ZrFe2相(x≥0.05)和La7Ni3相(x≥0.1).适量的Fe取代Co,不仅能提高La0.7Zr0.1-Mg0.2 Ni2.75C00.75-xFex(x=0,0.05,0.1,0.15,0.2)合金的储氢容量,降低合金的放氢平台压,改善合金氢化物的稳定性,而且能延长合金电极的循环寿命,提高合金电极的高倍率放电性能.
在氬氣保護下,採用磁懸浮感應鎔煉方法製備La0.7 Zr0.1 Mg0.2 Ni2.75 Co0.75-xFex (x=0,0.05,0.1,0.15,0.2)閤金,併研究Fe取代Co對La0.7 Zr0.1 Mg0.2 Ni2.5 Co0.75-xFex(x=0,0.05,0.1,0.15,0.2)閤金儲氫性能及電化學性能的影響.結果錶明:閤金主要由LaNi5和La2 Ni7相組成,隨著Fe含量的增加,LaNi5和La2 Ni7相的晶胞體積逐漸增大,且閤金中依次齣現ZrFe2相(x≥0.05)和La7Ni3相(x≥0.1).適量的Fe取代Co,不僅能提高La0.7Zr0.1-Mg0.2 Ni2.75C00.75-xFex(x=0,0.05,0.1,0.15,0.2)閤金的儲氫容量,降低閤金的放氫平檯壓,改善閤金氫化物的穩定性,而且能延長閤金電極的循環壽命,提高閤金電極的高倍率放電性能.
재아기보호하,채용자현부감응용련방법제비La0.7 Zr0.1 Mg0.2 Ni2.75 Co0.75-xFex (x=0,0.05,0.1,0.15,0.2)합금,병연구Fe취대Co대La0.7 Zr0.1 Mg0.2 Ni2.5 Co0.75-xFex(x=0,0.05,0.1,0.15,0.2)합금저경성능급전화학성능적영향.결과표명:합금주요유LaNi5화La2 Ni7상조성,수착Fe함량적증가,LaNi5화La2 Ni7상적정포체적축점증대,차합금중의차출현ZrFe2상(x≥0.05)화La7Ni3상(x≥0.1).괄량적Fe취대Co,불부능제고La0.7Zr0.1-Mg0.2 Ni2.75C00.75-xFex(x=0,0.05,0.1,0.15,0.2)합금적저경용량,강저합금적방경평태압,개선합금경화물적은정성,이차능연장합금전겁적순배수명,제고합금전겁적고배솔방전성능.
