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| Electrochemically Self-Assembled Fe/Cu Nanocomposite with Improved High-Rate and Low-Temperature Performances for Nickel-Iron Alkaline Battery |
| Author Name | Affiliation | E-mail | | LIU Ping | College of Materials Science and Engineering, Sichuan University, Chengdu 610065, China | | | ZHU Ding | Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610065, China | zhuding@scu.edu.cn | | YANG Jun | College of Materials Science and Engineering, Sichuan University, Chengdu 610065, China | | | HUANG Lan-Xiang | College of Materials Science and Engineering, Sichuan University, Chengdu 610065, China | | | CHEN Yun-Gui | College of Materials Science and Engineering, Sichuan University, Chengdu 610065, China | ygchen60@aliyun.com |
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| Abstract: Fe/Cu nanocomposite was simply self-assembled through the cathodic decomposition of tetragonal spinel CuFe2O4 (t-CuFe2O4) in alkaline solution. The phase transition from t-CuFe2O4 to Cu/Fe3O4, and eventually to Fe/Cu composite was monitored by cyclic voltammetry (CV) and X-ray powder diffraction (XRD). Transmission electron microscope (TEM), selected area electron diffraction (SAED) and scanning TEM-energy dispersive X-ray (STEM-EDX) observations showed that the electro-crystallized copper and iron nanoparticles dispersed homogeneously and contacted intimately. When the Fe/Cu nanocomposite electrode was tested as the anode for nickel-iron (Ni-Fe) rechargeable battery, it exhibited enhanced discharge capacity, charge-acceptance and especially remarkable high-rate and low-temperature performances. Excellent capacity output and potential characteristics were achieved at high discharge current density (4 500 mA·gFe-1) or low operation temperature (-40℃), respectively. Linear scanning voltammetry (LSV) analyses demonstrated that the incorporation of in situ formed copper facilitated the anodic kinetics of active iron, resulting to the markedly enhanced high-rate and low-temperature discharge-ability of electrode. |
| Keywords: copper ferrite self-assembly nanocomposite iron alkaline electrode high-rate and low temperature performance |
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| LIU Ping,ZHU Ding,YANG Jun,HUANG Lan-Xiang,CHEN Yun-Gui.Electrochemically Self-Assembled Fe/Cu Nanocomposite with Improved High-Rate and Low-Temperature Performances for Nickel-Iron Alkaline Battery[J].Chinese Journal of Inorganic Chemistry,2017,33(5):779-786. |
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