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摘要
以无水乙醇和去离子水的混合溶液作溶剂,采用混合溶剂热法,通过原位生长将锰酸锌(ZnMn2O4)负载在氧化铜(CuO)微米多孔球上,形成氧化铜/锰酸锌(CuO/ZnMn2O4)复合负极材料。CuO相当于结构稳定剂,可以缓冲ZnMn2O4充放电时较大的体积变化,抑制ZnMn2O4的团聚,增加电极材料的导电性,从而获得稳定、高性能的锂离子电池负极材料。制得的CuO/ZnMn2O4复合负极材料首次放电比容量为1352mAh/g,经过50次循环后仍保持890mAh/g,远高于纯ZnMn2O4以及商用碳负极。CuO/ZnMn2O4材料对大电流充放电条件下电化学性能的改善有显著提高。
Abstract
A mixed solution of absolute ethyl alcohol and deionized water were used as solvent,CuO/ZnMn2O4 composite cathode material was formed on the copper oxide(CuO) by growth in situ.CuO was equivalent to a strong mechanical carrier,which can buffer the large volume change of ZnMn2O4 during charge and discharge process,inhibited the agglomeration of ZnMn2O4,increased the conductivity of electrode material,and obtain a stable and high performance cathode material for lithium ion batteries.The CuO/ZnMn2O4 material first discharge capacity was 1352mAh/g and remained at a high level of 890mAh/g after 50 cycles,much higher than pure ZnMn2O4 and commercial carbon cathode materials.The improvement of electrochemical performance of CuO/ZnMn2O4 under high current charge and discharge was significant.
关键词
混合溶剂热法
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锰酸锌
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氧化铜
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电化学
Key words
mixed solvothermal method
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zinc manganate
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copper oxide
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electrochemistry
CuO/ZnMn2O4锂离子电池负极材料的制备及电化学性能研究[J].
化工新型材料, 2019, 47(10): 125-129 DOI:
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基金资助
国家自然科学基金(51472119,21474053)
