Investigation on the structure and electrochemical properties of the laser sintered La_0.7Mg_0.3Ni_3.5 hydrogen storage alloys

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• 作者：T.Z. Si ; Q.A. Zhang ; N. Liu
• 关键词：Laser sintering ; none ; color ; black" href="/science?_ob=MathURL&_method=retrieve&_udi=B6V3F-4RWB0SP-4&_mathId=mml58&_user=1067359&_cdi=5729&_rdoc=14&_acct=C000050221&_version=1&_userid=10&md5=f8bc04ebe41ecf9e34
• 刊名：International Journal of Hydrogen Energy
• 出版年：2008
• 期刊代码：42_03603199
• 类别：ch
• 出版时间：March 2008
• 卷：33
• 期：6
• 页码：1729-1734
• 文件大小：800 K

摘要

The structure and electrochemical properties of the 729&_rdoc=14&_acct=C000050221&_version=1&_userid=10&md5=fefc64cd155b628fc932f14c9f1ccbcd" title="Click to view the MathML source" alt="Click to view the MathML source">La_0.7Mg_0.3Ni_3.5 alloys laser sintered at different powers were investigated. It is found that all alloys contain three phases 729&_rdoc=14&_acct=C000050221&_version=1&_userid=10&md5=f9353d8bd992602eb3384fba3c880b57" title="Click to view the MathML source" alt="Click to view the MathML source">La₃MgNi₁₄ with the 729&_rdoc=14&_acct=C000050221&_version=1&_userid=10&md5=21ba8424b60a07889700c435baa1c79a" title="Click to view the MathML source" alt="Click to view the MathML source">Ce₂Ni₇ structure, 50">50&_user=1067359&_cdi=5729&_rdoc=14&_acct=C000050221&_version=1&_userid=10&md5=0517bb2e01f0a64f278b9008e63d5691" title="Click to view the MathML source" alt="Click to view the MathML source">LaNi₅ and 729&_rdoc=14&_acct=C000050221&_version=1&_userid=10&md5=b364ac63b4aa3a8ff860fca9f0329a31" title="Click to view the MathML source" alt="Click to view the MathML source">LaMgNi₄. The abundance of the main phase 729&_rdoc=14&_acct=C000050221&_version=1&_userid=10&md5=dd6d642087e74683ca7390c420ee87fb" title="Click to view the MathML source" alt="Click to view the MathML source">La₃MgNi₁₄ is 43, 68 and 63 wt%, respectively, when sintering power varies from 1000 to 1200 and 1400 W. The laser sintered 729&_rdoc=14&_acct=C000050221&_version=1&_userid=10&md5=649c4852e6a9ec80241ebc64cec906c6" title="Click to view the MathML source" alt="Click to view the MathML source">La_0.7Mg_0.3Ni_3.5 alloys can be activated to their maximum discharge capacity within three cycles. The discharge capacities of those alloys prepared by laser sintering at 1000, 1200 and 1400 W are 324.6, 352.8 and 340.5 mAh/g, respectively. The 729&_rdoc=14&_acct=C000050221&_version=1&_userid=10&md5=578e3b8de43a906bdc1a745c2bde0e3f" title="Click to view the MathML source" alt="Click to view the MathML source">La_0.7Mg_0.3Ni_3.5 alloy laser sintered at 1200 W has a best cyclic stability 729&_rdoc=14&_acct=C000050221&_version=1&_userid=10&md5=7e6e9285eb64ec1f481fa9c2efdd8358" title="Click to view the MathML source" alt="Click to view the MathML source">(S₁₀₀=58.4%) and high-rate dischargeability 729&_rdoc=14&_acct=C000050221&_version=1&_userid=10&md5=da242c119b96e1e9567b8794d5922e24" title="Click to view the MathML source" alt="Click to view the MathML source">(HRD₈₀₀=79.4%) due to the high amount of the main phase 729&_rdoc=14&_acct=C000050221&_version=1&_userid=10&md5=250ed24bb08c5ed5981067c09e961ae3" title="Click to view the MathML source" alt="Click to view the MathML source">La₃MgNi₁₄.