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Direct electrochemical preparation of CeCo_5 alloy from mixed oxides 被引量:1

直接电解金属氧化物制备CeCo_5合金(英文)
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摘要 CeCo5 alloy was prepared from the mixture of cobalt oxide (Co3O4) and cerium oxide (CeO2) powders by electro-deoxidation in molten calcium chloride. The effects of the cell voltage and sintering temperature on the electrolysis process were reported. The electro-deoxidation mechanism was investigated by potentiodynamic polarization using a molybdenum cavity electrode in conjunction with characterization of the products from constant voltage electrolysis under different conditions by XRD and SEM. The electrochemical property of CeCo5 alloy was investigated by cyclic voltammetry measurements. The results show that the electro-deoxidation rate increases with increasing the cell voltage and decreasing the sintering temperature. The pure CeCo5 can be prepared by direct electro-deoxidation of mixed CeO2/Co3O4 pellets sintered at 850 °C when the cell voltage of 3.1 V is applied. The electro-deoxidation proceeds by the simultaneous reduction of Co3O4 to Co and reduction of CeO2 to CeOCl, followed by CeOCl reduction on the pre-formed Co to form CeCo5 alloy which shows a good cycling stability. 在CaCl2熔盐中,以Co3O4和CeO2混合氧化物为原料,采用熔盐电脱氧法制备CeCo5合金。研究电解电压、烧结温度等对电脱氧过程的影响。采用SEM和XRD对不同条件下制备的产物微观形貌和相组成进行表征,并结合动电位极化法,研究电脱氧机理。采用循环伏安法研究材料的电化学性能。结果表明:随着电解电压的升高和烧结温度的降低,电脱氧速度逐渐加快。在850°C下烧结的混合氧化物试样,在3.1V电压下电解,可制备出纯相的CeCo5合金。在电脱氧过程中,Co3O4还原成单质Co,CeO2还原成CeOCl,CeOCl在单质Co表面还原而形成CeCo5合金。所制备的合金表现出良好的电化学循环稳定性。
出处 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2012年第8期2007-2013,共7页 中国有色金属学报(英文版)
基金 Project (E2010000941) supported by Hebei Provincial Natural Science Foundation of China Project (11212119D) supported by Hebei Provincial Science and Technology Support Program of China
关键词 ELECTRO-DEOXIDATION CeCo5 alloy CaCl2 melt OXIDES 电脱氧 CeCo5合金 CaCl2熔盐 氧化物
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  • 1汪飞,赵铭姝,宋晓平.锂离子电池锡基负极材料的研究进展[J].电池,2005,35(2):152-154. 被引量:7
  • 2邓丽琴,许茜,李兵,翟玉春,黄振奇.电脱氧法由Nb_2O_5直接制备金属铌[J].中国有色金属学报,2005,15(4):541-545. 被引量:45
  • 3NEEDHAM S A,WANG G X,LIU H K.Electrochemical performance of SnSb and Sn/SnSb nanosize powders as anode materials in Li-ion cells[J].Journal of Alloys and Compounds,2005,400:234-238.
  • 4HASSOUN J,PANERO S,SCROSATI B.Electrodeposited Ni-Sn intermetallic electrodes for advanced lithium ion batteries[J].Journal of Power Sources,2006,160:1336-1341.
  • 5WANG G X,AHN J H,LINDSAY M J,SUN L,BRADHURST D H,DOU S X,LIU H K.Graphite-tin composites as anode materials for lithium-ion batteries[J].Journal of Power Sources,2001,97/98:211-215.
  • 6KIM D G,KIM H,SOHN H J,KANG T.Nanosized Sn-Cu-B alloy anode prepared by chemical reduction for secondary lithium batteries[J].Journal of Power Sources,2002,104(2):221-225.
  • 7TAMURA N,OHSHITA R,FUJITANI S,KAMINO M,FUJITAN S.Advanced structures in electrodeposited tin base negative electrodes for lithium secondary batteries[J].Journal of The Electrochemical Society,2003,150 (6):A679-A683.
  • 8XIA Y,SAKAI T,FUJIEDA T,WADA M,YOSHINAGA H.Flake Cu-Sn alloys as negative electrode materials for rechargeable lithium batteries[J].Journal of the Electrochemical Society,2001,148(5):A471-A481.
  • 9GUO H,ZHAO H L,YIN C L,QIU G H.Si/SnSb alloy composite as high capacity anode materials for Li-ion batteries[J].Journal of Alloys and Compounds,2006,426:277-280.
  • 10CHEN G Z,FRAY D J,FARTHING T W.Direct electrochemical reduction of titanium dioxide to titanium in molten calcium chloride[J].Nature,2000,407:361-364.

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  • 1刘美凤,郭占成,卢维昌.TiO_2直接电解还原过程的研究[J].中国有色金属学报,2004,14(10):1752-1758. 被引量:47
  • 2胡小锋,许茜.CaCl_2-NaCl熔盐电脱氧法制备金属Ta[J].金属学报,2006,42(3):285-289. 被引量:44
  • 3朱用,马猛,汪的华,蒋凯,胡晓宏,金先波,陈政.熔盐电还原固态混合氧化物低能耗制备TiNi合金[J].科学通报,2006,51(16):1966-1970. 被引量:8
  • 4ABDELKADER A M, TRIPURANENI K K, COX A, et al. DC voltammetry of electro-deoxidation of solid oxides [J]. Chemical Reviews,2013,113(5):2 863-2 886.
  • 5CHEN G Z,FRAY D J, FARTHING T W. Direct elec- trochemical reduction of titanium dioxide to titanium in molten calcium chloride[J]. Nature, 2000,407 (6 802) : 361-364.
  • 6PAL Uday B, WOOLLEY David E, KENNEY George B. Emerging SOM technology for the green synthesis of metals from oxides[J]. JOM, 2001,53 (10) : 32-35.
  • 7FRAY D J,CHEN G Z. Reduction of titanium and other metal oxides using electrodeoxidation[J]. Materials Sci- ence and Technology, 2004,20(3) : 295-300.
  • 8WANG S L, LI Y J. Reaction mechanism of direct elec- tro-reduction of titanium dioxide in molten calcium chlo- ride[J]. Journal of Electroanalytical Chemistry, 2004, 571(1) :37-42.
  • 9YAN X Y,FRAY D J. Direct electrochemical reduction of niobium pentoxide to niobium metal in a eutectic of CaClz-NaC1 melt[C]//Light Metals: Proceedings of Ses- sions, TMS Annual Meeting. Warrendale : TMS, 2004 : 5- 16.
  • 10YAN X Y,FRAY D J. Production of niobium powder by direct electrochemical reduction of solid Nb20s in a eu- tectic CaClz-NaC1 melts[J]. Metallurgical and Materials Transctions B, 2002,33 (5) : 685-693.

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