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通過水熱法合成的納米鐵酸鎳/石墨復(fù)合陽極材料具有優(yōu)異的電化學(xué)性能
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華南師范大學(xué),華南師范大學(xué),華南師范大學(xué),華南師范大學(xué),電子科技大學(xué)(中山),南京工業(yè)大學(xué)

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NSFC, Nos. 51201066 and 51171065，Nos. S2012020010937，No. 20123A326。


One-pot synthesis of nano-NiFe2O4 pinning on the surface of the graphite composite asSsuperiorSanodes for Li-ion batteries
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Laboratory of Quantum Engineering and Quantum Materials,School of Physics and Telecommunication Engineering,South China Normal University,Laboratory of Quantum Engineering and Quantum Materials,School of Physics and Telecommunication Engineering,South China Normal University,Laboratory of Quantum Engineering and Quantum Materials,School of Physics and Telecommunication Engineering,South China Normal University，Engineering Research Center of Materials & Technology for Electrochemical Energy Storage (Ministry of Education), Guangzhou 510006, China,Laboratory of Quantum Engineering and Quantum Materials,School of Physics and Telecommunication Engineering,South China Normal University,Zhongshan Institute, University of Electronic Science and Technology, Zhongshan 528400, China,Institute of Advanced Materials, Nanjing University of Technology, Nanjing 210009, China

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    摘要:

    作為鋰離子電池陽極材料的鐵酸鎳及其相關(guān)材料，由于其具有較高的理論比容量，近來受到廣泛關(guān)注。為了克服在充放電過程中的較低導(dǎo)電性與較大的體積膨脹等不良因素，本文通過水熱法合成了納米鐵酸鎳釘扎在石墨表面而形成的復(fù)合物。該納米鐵酸鎳/石墨復(fù)合物表現(xiàn)出了較高的比容量以及優(yōu)異的循環(huán)性能。其初始放電容量接近1478mAh g-1，并且在100 mA g-1的電流密度下循環(huán)50周之后，其可逆容量依然高達1109 mAh g-1。在1000 mA g-1的充電電流情況下，該復(fù)合材料的充電容量也能保持750 mA g-1。這優(yōu)異的電化學(xué)性能主要歸功于納米鐵酸鎳能夠穩(wěn)定的釘扎在石墨表面上，這種特殊的結(jié)構(gòu)增強了材料的導(dǎo)電性同時也增大了材料的表面比容量。

    Abstract:

    Nickel ferrite and related materials have recently received considerable attention as potential anode in lithium-ion batteries for their high theoretical specific capacities. To overcome the problem of low intrinsic electronic conductivity and large volume expansion during the Li insertion/extraction process, in this work, nano-NiFe2O4 pinning on the surface of the graphite composite is prepared by hydrothermal method. As the superior anode material, the as-obtained nano-NiFe2O4/graphite composite demonstrates high capacity and excellent cycle stability. An initial specific discharge capacity of approximately 1478 mAh g-1 and a reversible specific capacity of approximately 1109 mAh g-1 after 50 cycles at a current density of 100 mA g-1 are reached. When the charging current is increased to 1000 mA g-1, it also delivers a charge capacity of 750 mAh g-1. The excellent performances are attributed to the special structure of NiFe2O4 nanoparticles pinning on the surface of the graphite, especially the enhanced electronic conductivity and area specific capacitance during the cycling process.

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侯賢華,唐小琴,胡社軍,王鑫瑜,高玉梅,劉祥.通過水熱法合成的納米鐵酸鎳/石墨復(fù)合陽極材料具有優(yōu)異的電化學(xué)性能[J].稀有金屬材料與工程,2017,46(5):1169~1175.[Xianhua Hou, Xiaoqin Tang, Shejun Hu, Xinyu Wang, Yumei Gao, Xiang Liu. One-pot synthesis of nano-NiFe2O4 pinning on the surface of the graphite composite asSsuperiorSanodes for Li-ion batteries[J]. Rare Metal Materials and Engineering,2017,46(5):1169~1175.]
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  • 收稿日期:2015-01-30
  • 最后修改日期:2015-02-27
  • 錄用日期:2015-05-13
  • 在線發(fā)布日期: 2017-09-27
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