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活化剂对大豆壳制备的多孔碳材料储锂性能的影响

李鑫 王秋芬 田会芳 缪娟 许卫国 郑影 曲志珂

李鑫, 王秋芬, 田会芳, 等. 活化剂对大豆壳制备的多孔碳材料储锂性能的影响[J]. 复合材料学报, 2022, 39(10): 1-10 doi: 10.13801/j.cnki.fhclxb.20211129.003
引用本文: 李鑫, 王秋芬, 田会芳, 等. 活化剂对大豆壳制备的多孔碳材料储锂性能的影响[J]. 复合材料学报, 2022, 39(10): 1-10 doi: 10.13801/j.cnki.fhclxb.20211129.003
Xin LI, Qiufen WANG, Huifang TIAN, Juan MIAO, Weiguo XU, Ying ZHENG, Zhike QU. Effect of activator on lithium storage performance of porous carbon materials prepared from soybean hulls[J]. Acta Materiae Compositae Sinica, 2022, 39(10): 1-10. doi: 10.13801/j.cnki.fhclxb.20211129.003
Citation: Xin LI, Qiufen WANG, Huifang TIAN, Juan MIAO, Weiguo XU, Ying ZHENG, Zhike QU. Effect of activator on lithium storage performance of porous carbon materials prepared from soybean hulls[J]. Acta Materiae Compositae Sinica, 2022, 39(10): 1-10. doi: 10.13801/j.cnki.fhclxb.20211129.003

活化剂对大豆壳制备的多孔碳材料储锂性能的影响

doi: 10.13801/j.cnki.fhclxb.20211129.003
基金项目: 河南省高校基本科研业务费专项资金资助(NSFRF200402);河南省高校重点科研项目(22A530001)
详细信息
    通讯作者:

    王秋芬,博士,副教授,硕士生导师,主要从事新能源材料及器件等方面的研究工作 E-mail: wqf@hpu.edu.cn

  • 中图分类号: TM912.9

Effect of activator on lithium storage performance of porous carbon materials prepared from soybean hulls

  • 摘要: 生物质多孔碳材料因来源广泛、性价比高,被广泛应用在锂离子电池中,而制备过程中使用的活化剂对材料储锂性能影响较大。因此,以大豆壳为碳源,在不同工艺条件下制备多孔碳材料,通过结构表征和电化学性能测试,考察活化剂对多孔碳材料储锂性能的影响。研究表明:(1)当电流密度为185 mA·g−1,电压范围为0~3.0 V时,经CaCl2活化的多孔碳材料(DK-CaCl2)的首次放充电比容量为639.0/269.5 mA·h·g−1,而KOH活化的多孔碳(DK-KOH)的首次放充电比容量为986.7/307.5 mA·h·g−1;(2)大豆壳∶KOH的质量比分别为1∶2、1∶4和1∶8时,得到的多孔碳的首次放充电比容量为544.9/136.8、986.7/307.5和375.1/93.4 mA·h·g−1,200次循环后放电比容量分别为88.8、318.9和94.7 mA·h·g−1。这说明不同活化剂及不同活化比例制备的多孔碳材料储锂性能不同,这是由于材料的比表面积不同,导致了电化学性能的不同。

     

  • 图  1  以大豆壳为碳源,通过水热法和高温碳化法制备多孔碳(DK)材料的流程示意图

    Figure  1.  Schematic diagram of preparation process of porous carbon (DK) materials by hydrothermal method and high temperature carbonization method using soybean shell as carbon source

    图  2  DK-CaCl2和DK-KOH材料的XRD图谱(a)、FTIR 图谱(b)和拉曼图谱(c)

    Figure  2.  XRD pattern (a), FTIR spectra (b) and Raman spectra (c) of DK-CaCl2 and DK-KOH

    图  3  DK-CaCl2和DK-KOH 材料的 SEM图像((a)、(b))和TEM 图像((c)、(d))

    Figure  3.  SEM images ((a), (b)) and TEM images ((c), (d)) of DK-CaCl2 and DK-KOH

    图  4  DK-CaCl2和DK-KOH材料的N2吸附脱附曲线(a)和孔径分布曲线(b)

    Figure  4.  N2 adsorption and desorption curves (a) and pore size distribution curves (b) of DK-CaCl2 and DK-KOH

    图  5  (a)材料的首次充放电性能图;(b)循环性能图;(c) DK-CaCl2的CV图;(d) DK-KOH的CV图;(e) EIS图;(f)不同荷电状态下角频率平方根的倒数(ω−1/2)与Z'的关系

    Figure  5.  (a) Initial charge-discharge performance diagram; (b) Cyclic performance diagram; (c) CV diagram of DK-CaCl2; (d) CV diagram of DK-KOH; (e) EIS of DK-CaCl2 and DK-KOH materials; (f) Relationship between Z' and reciprocal of square root of angular frequency (ω−1/2) under different states of charge

    图  6  DK-2KOH、DK-4KOH、DK-8KOH的XRD 图谱(a)和拉曼图谱(b)

    Figure  6.  XRD pattern (a) and Raman pattern (b) of DK-2KOH, DK-4KOH and DK-8KOH

    图  7  DK-2KOH、DK-4KOH和DK-8KOH材料的SEM图谱((a)~(c))和TEM图谱((d)~(f))

    Figure  7.  SEM images ((a)-(c)) and TEM images ((d)-(f)) of DK-2KOH, DK-4KOH and DK-8KOH

    图  8  (a)材料的首次充放电性能图;(b)循环性能图;(c) DK-2KOH的CV图;(d) DK-4KOH 的CV图;(e) DK-8KOH 的CV图;(f) EIS图;(g)不同荷电状态下角频率的平方根的倒数(ω−1/2)与Z'的关系

    Figure  8.  (a) Initial charge-discharge performance diagram; (b) Cyclic performance diagram; (c) CV diagram of DK-2KOH; (d) CV diagram of DK-4KOH; (e) CV diagram of DK-8KOH; (f) EIS diagram; (g) Relationship between Z' and reciprocal of square root of angular frequency (ω−1/2) under different states of charge

    表  1  DK-CaCl2和 DK-KOH的拟合线性数据

    Table  1.   Fitting linear data of DK-CaCl2 and DK-KOH

    MaterialInterceptSlope
    DK-CaCl267.3721.75
    DK-KOH39.3117.52
    下载: 导出CSV

    表  2  DK-2KOH、DK-4KOH和DK-8KOH的拟合线性数据

    Table  2.   Fitting linear data of DK-2KOH, DK-4KOH and DK-8KOH

    MaterialInterceptSlope
    DK-2KOH62.3245.18
    DK-4KOH40.2316.14
    DK-8KOH92.57102.0
    下载: 导出CSV
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  • 收稿日期:  2021-09-15
  • 录用日期:  2021-11-19
  • 修回日期:  2021-11-12
  • 网络出版日期:  2021-11-30
  • 刊出日期:  2022-10-15

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