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Preparation of high-performance anthracite-based graphite anode materials and their lithium storage properties

LI Yuan TIAN Xiaodong SONG Yan YANG Tao WU Shijie LIU Zhanjun

李圆, 田晓冬, 宋燕, 杨桃, 武世杰, 刘占军. 高性能无烟煤基石墨的制备及其储锂性能研究[J]. 新型炭材料. doi: 10.1016/S1872-5805(21)60057-4
引用本文: 李圆, 田晓冬, 宋燕, 杨桃, 武世杰, 刘占军. 高性能无烟煤基石墨的制备及其储锂性能研究[J]. 新型炭材料. doi: 10.1016/S1872-5805(21)60057-4
LI Yuan, TIAN Xiaodong, SONG Yan, YANG Tao, WU Shijie, LIU Zhanjun. Preparation of high-performance anthracite-based graphite anode materials and their lithium storage properties[J]. NEW CARBON MATERIALS. doi: 10.1016/S1872-5805(21)60057-4
Citation: LI Yuan, TIAN Xiaodong, SONG Yan, YANG Tao, WU Shijie, LIU Zhanjun. Preparation of high-performance anthracite-based graphite anode materials and their lithium storage properties[J]. NEW CARBON MATERIALS. doi: 10.1016/S1872-5805(21)60057-4

高性能无烟煤基石墨的制备及其储锂性能研究

doi: 10.1016/S1872-5805(21)60057-4

Preparation of high-performance anthracite-based graphite anode materials and their lithium storage properties

Funds: National Natural Science Foundation of China (52072383, U1610252), Natural Science Foundation of Shanxi Province (201801D221371) and the Outstanding PhD. Program of Shanxi Province (SQ2019001)
More Information
  • 摘要: 本文以无烟煤为原料, 以工业硅粉为催化剂进行催化石墨化, 制备了具有不同微观结构的煤基石墨, 分析了催化反应机制, 并考察了所制备的煤基石墨作为锂电负极的电化学性能, 进行了结构与性能的相关性研究. 研究结果表明: 当催化剂含量为5%时, 所得石墨(G-2800-5%)的微晶尺寸较大, 有序度较高, 石墨化度为91.5%. 将其用作锂离子电池负极材料时, 表现出较好的电化学特性, 在0.1 A g−1电流密度下稳定可逆容量为369 mAh g−1, 当电流密度增大至1 A g−1, 依然保持了209 mAh g−1的容量, 在0.2 A g−1电流密度下循环200次的容量保持率可达92.2%. G-2800-5%样品石墨结构有序度高, 表面形成的SEI膜薄且均匀, 锂离子的不可逆损失少, 因此其综合电化学性能较好.
  • Figure  1.  Illustration of the fabrication process of graphitized anthracite

    Figure  2.  XRD patterns of samples.

    Figure  3.  Raman spectra of samples

    Figure  4.  Schematic diagram for the mechanism of catalytic graphitization

    Figure  5.  Charge/discharge curves (a) and CV curves (b) of as-obtained samples at 0.1 A g−1 and 0.1 mV s−1, respectively, CV curves of G-2800-5% for the initial three cycles (c), cyclic performance (d), rate performance (e) and Nyquist plots (f) of as-prepared samples

    Table  1.   Lattice parameters of samples

    Sampled(002)/nmLa/nmLc/nmG/%ID/IG
    G-2800-0%0.3364954389.50.09
    G-2800-5%0.33611364791.50.07
    G-2800-10%0.33631054589.50.10
    下载: 导出CSV

    Table  2.   Electrochemical performance of samples

    SampleInitial/
    mAh g−1
    200th
    /mAh g−1
    0.1 A g−1
    /mAh g−1
    0.2 A g−1
    /mAh g−1
    0.5 A g−1
    /mAh g−1
    1 A g−1
    /mAh g−1
    G-2800-0%320.1287.9341.2321.3282.5186.8
    G-2800-5%393.7325.6369.0353.2305.9209.0
    G-2800-10%345.7267.7346.7327.4287.0208.2
    Note: Initial means initial charge capacity. 200th means the capacity after 200 cycles.
    下载: 导出CSV

    Table  3.   Comparison of first charging performance of sample with other literatures

    SamplePrecursorTemperture/
    °C
    CatalyzerInitial charge/
    mAh g−1
    Ref.
    SG-2800anthracite2800379.1/0.1 C[28]
    GAanthracite2800340.2/
    37 mA g−1
    [13]
    GAanthracite2800361.4/0.1 C[29]
    Anthraciteanthracite1100370.0/
    30 mA g−1
    [12]
    TXG/2800anthracite2800299.0/0.2 C[10]
    TXG/Laanthracite2800La2O3337.2/0.2 C[10]
    G-2800-5%anthracite2800Si393.7/0.1 A g−1This work
    下载: 导出CSV

    Table  4.   AC impedance fitting parameters of the graphite samples

    SampleRSEIRct/ΩW/Ω (10−6)
    G-2800-0%68.40.23809.1
    G-2800-5%33.50.12714.4
    G-2800-10%72.30.05845.2
    下载: 导出CSV
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出版历程
  • 收稿日期:  2020-01-01
  • 修回日期:  2020-01-01
  • 网络出版日期:  2021-04-28

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