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濕浸漬法合成LiMnBO3/C復(fù)合材料及其電化學(xué)性能改善
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湖南科技大學(xué)化學(xué)化工學(xué)院,吉首大學(xué),湖南科技大學(xué)化學(xué)化工學(xué)院,湖南科技大學(xué)化學(xué)化工學(xué)院,湖南科技大學(xué)化學(xué)化工學(xué)院

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國家自然科學(xué)基金項(xiàng)目（面上項(xiàng)目，重點(diǎn)項(xiàng)目，重大項(xiàng)目）


Improved Electrochemical performance of LiMnBO3/C composite synthesized by wet impregnating method
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School of Chemistry and chemical Engineering, Hunan University of Science and Technology,Hunan University of Science and Technology,School of Chemistry and chemical Engineering, Hunan University of Science and Technology,School of Chemistry and chemical Engineering, Hunan University of Science and Technology,School of Chemistry and chemical Engineering, Hunan University of Science and Technology

Fund Project:

National Natural Science Foundation of China (51004056); Opening Foundation of Key Laboratory of Inorganic Coating Materials, Chinese Academy of Sciences (KKZ6201152009); Specialized Research Fund for the Doctoral Program of Higher Education (20125314110011); Applied Basic Research Foundation of Yunnan Province (2010ZC052); Applied Basic Research Key Plans Program of?Yunnan?Province?(2014FA024)

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    摘要:

    以三維網(wǎng)絡(luò)結(jié)構(gòu)的科琴黑(KB)為模板和導(dǎo)電骨架，采用濕浸漬法合成了六方結(jié)構(gòu)的LiMnBO3/C復(fù)合材料。用X-射線衍射、掃描電鏡和氮吸附等測試技術(shù)分別對樣品的微觀結(jié)構(gòu)、形貌和比表面積進(jìn)行了表征。用恒流充放電和循環(huán)伏安對復(fù)合材料的電化學(xué)性能進(jìn)行了表征。當(dāng)LiMnBO3/C復(fù)合材料以C/20倍率進(jìn)行鋰離子脫嵌性能測試時(shí)，30周循環(huán)后放電容量保持率為87.4%，表現(xiàn)出優(yōu)良的循環(huán)穩(wěn)定性。當(dāng)電流從C/20、C/10增至C/5時(shí)，復(fù)合材料的首次放電比容量依次為138.8、124.5和100.5mA h g-1，表明復(fù)合材料具有良好的倍率性能。

    Abstract:

    Hexagonal-LiMnBO3/C composite was prepared by the wet impregnating method using the 3D-network ketchen black (KB) as both temple and conductive framework. The crystal structure, morphology and specific surface area were characterized by X-ray diffraction, scanning electron microscopy and nitrogen sorption measurements, respectively. The electrochemical properties of the composite were studied by galvanostatic charge/discharge and cyclic voltammetry measurements. When tested at C/20 rate for Li ion insertion/extraction properties, LiMnBO3/C composite exhibits good cycle capability with discharge capacity retention of 87.4% at the 30th cycle. As the current rate increases from C/20, C/10 to C/5, good rate capability was obtained for all rates with initial discharge specific capacities of 138.8, 124.5 and 100.5 mA h g-1, respectively.

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引用本文

唐安平,何則強(qiáng),徐國榮,彭榮華,宋海申.濕浸漬法合成LiMnBO3/C復(fù)合材料及其電化學(xué)性能改善[J].稀有金屬材料與工程,2017,46(1):78~82.[tang an ping, He Zeqiang, Xu Guorong, peng rong hua, song hai shen. Improved Electrochemical performance of LiMnBO3/C composite synthesized by wet impregnating method[J]. Rare Metal Materials and Engineering,2017,46(1):78~82.]
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  • 收稿日期:2014-10-06
  • 最后修改日期:2014-11-07
  • 錄用日期:2014-12-25
  • 在線發(fā)布日期: 2017-03-16
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