The improved electrochemical properties of novel La-Mg-Ni-based hydrogen storage composites
文献类型：期刊论文
| 作者 | Chu, Hai-Liang; Qiu, Shu-Jun; Sun, Li-Xian; Zhang, Yao; Xu, Fen; Jiang, Tao; Li, Wei-Xue; Zhu, Min; Hu, Wang-Yu |
| 刊名 | electrochimica acta
 |
| 出版日期 | 2007-08-01 |
| 卷号 | 52期号:24页码:6700-6706 |
| 关键词 | Ni/MH batteries la-mg-ni hydrogen storage alloy composite electrochemical properties electrochemical kinetics corrosion behaviors |
| 英文摘要 | in the present study, a novel alloy composite has been synthesized by ball milling nonstoichiometric ab(3)-type la(0.7)mg(0.3)ni(3.5) alloy with ti(0.17)zr(0.08)v(0.35)cr(0.1)ni(0.3) alloy in order to improve the cyclic stability and other electrochemical properties of la(0.7)mg(0.3)ni(3.5) alloy electrode. the phase structure, morphology and electrochemical performances of the composite have been investigated systematically. from x-ray diffraction (xrd) patterns, it can be found that the la(0.7)mg(0.3)ni(3.5) and ti(0.17)zr(0.08)v(0.35)cr(0.1)ni(0.3) alloys still retain their respective phase structures in the composite. electrochemical studies show that the cyclic stability of the composite electrode is noticeably improved after 100 charge-discharge cycles in comparison with single la(0.7)mg(0.3)ni(3.5) alloy electrode due to enhanced anti-corrosion performance in the alkaline electrolyte. the discharge capacity retention rate c(100)/c(max) of composite electrode is 62.3%, which is much higher than that of the la(0.7)mg(0.3)ni(3.5) alloy electrode, although the maximum discharge capacity of the former decreases moderately. both electrochemical impedance spectra (eis) and linear polarization (lp) studies indicate that the electrochemical kinetics of the composite electrode is also improved. the charge-transfer resistance (r(ct)), the polarization resistance (r(p)) and the exchange current density (i(0)) of the composite electrode are 160.2 m omega, 129.5 m omega and 201.6 ma/g, respectively, which are superior to those of the la(0.7)mg(0.3)ni(3.5) alloy electrode. (c) 2007 elsevier ltd. all rights reserved. |
| WOS标题词 | science & technology ; physical sciences |
| 类目[WOS] | electrochemistry |
| 研究领域[WOS] | electrochemistry |
| 关键词[WOS] | metal hydride electrodes ; solid-solution alloys ; pd substitution ; impedance ; capacity ; mn ; co |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000248783300015 |
| 公开日期 | 2015-11-17 |
| 源URL | [http://159.226.238.44/handle/321008/140738]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 作者单位 | 1.Chinese Acad Sci, Dalian Inst Chem Phys, Mat & Thermochem Lab, Dalian 116023, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China 3.Jinan Univ, Inst Nanochem, Dept Chem, Guangzhou 510632, Peoples R China 4.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lan Catalysis, Dalian 116023, Peoples R China 5.Chinese Acad Sci, Dalian Inst Chem Phys, Ctr Theoret & Computat Chem, Dalian 116023, Peoples R China 6.S China Univ Technol, Sch Mech Engn, Guangzhou 510641, Peoples R China 7.Hunan Univ, Dept Appl Phys, Changsha 410082, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chu, Hai-Liang,Qiu, Shu-Jun,Sun, Li-Xian,et al. The improved electrochemical properties of novel La-Mg-Ni-based hydrogen storage composites[J]. electrochimica acta,2007,52(24):6700-6706. |
| APA | Chu, Hai-Liang.,Qiu, Shu-Jun.,Sun, Li-Xian.,Zhang, Yao.,Xu, Fen.,...&Hu, Wang-Yu.(2007).The improved electrochemical properties of novel La-Mg-Ni-based hydrogen storage composites.electrochimica acta,52(24),6700-6706. |
| MLA | Chu, Hai-Liang,et al."The improved electrochemical properties of novel La-Mg-Ni-based hydrogen storage composites".electrochimica acta 52.24(2007):6700-6706. |
入库方式： OAI收割
来源：大连化学物理研究所
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