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    李克艳

    • 副教授     博士生导师   硕士生导师
    • 性别:女
    • 毕业院校:大连理工大学
    • 学位:博士
    • 所在单位:化工学院
    • 学科:工业催化
    • 办公地点:西部校区化工实验楼B223
    • 联系方式:0411-84986484
    • 电子邮箱:keyanli@dlut.edu.cn

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    High performance porous MnO@C composite anode materials for lithium-ion batteries

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    论文类型:期刊论文

    发表时间:2016-01-10

    发表刊物:ELECTROCHIMICA ACTA

    收录刊物:SCIE、EI

    卷号:188

    页面范围:793-800

    ISSN号:0013-4686

    关键字:MnO@C composite; Porous structure; Precipitation; Glucose; Lithium-ion batteries

    摘要:MnC2O4 precursor was prepared by a precipitation method, and then porous MnO@C composites were obtained by mixing MnC2O4 precursor with different amounts of glucose and sintering at different temperatures. The influences of carbon content and crystallinity on the electrochemical performance of MnO@C were investigated. Galvanostatic charge-discharge test results showed that the MnO@C sample "1.2,700" has the largest specific capacity among all samples, which can reach high specific discharge capacity of 1691 mAhg(-1) at the current density of 100 mAg(-1) after 200 cycles. Even at the high current density of 1600 mA g(-1), a remarkable discharge capacity of 630 mAhg(-1) can still be delivered, demonstrating a good rate capability. The excellent electrochemical performance can be ascribed to porous structure, good crystallinity and proper amount of carbon coating. This facile method can be applied to the large-scale synthesis of high performance transition metal oxide@carbon composite electrode materials. (C) 2015 Elsevier Ltd. All rights reserved.