Page 175 - 《精细化工》2022年第3期

第 3 期 兰大为，等: MnS 掺杂多孔碳复合材料的制备及电化学性能 ·597·

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和 0.32 V 附近的两个还原峰是由于 Li 的嵌入。在 uniform Fe 1–xS nanostructures as a high rate anode for sodium ion
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对应的阳极扫描曲线中，氧化峰出现在 1.25 V 左右， [6] LI J B, LI J L, YAN D, et al. Design of pomegranate-like clusters
+
这与 Li 的脱出过程密切相关。从第二次循环开始， with NiS 2 nanoparticles anchored on nitrogen-doped porous carbon
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其次，为研究该复合材料的动态行为，在频率 MnS derived from metal-organic frameworks as high-performance
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5
–2
1.0×10 ~1.0×10 Hz 范围内对其进行交流阻抗测试。 228: 42-45.
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从图 6d 可以看出，两条 Nyquist 曲线都是由高频区 grown on N-S co-doped rGO as a long-life and high-capacity anode
的一个半圆和低频区的一条直线组成。其中，高频 material of Li-ion batteries[J]. Applied Surface Science, 2017, 416:
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区半圆对应的 SEI 膜电阻和电荷转移电阻（R ct ），低 [9] YUAN T Z, JIANG Y Z, SUN W P, et al. Ever-increasing pseudo
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MnS@C 复合材料的电荷转移电阻 R ct 分别为 419 和 26: 2198-2206.
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147 Ω，两个样品的 R s 分别为 5.50 和 1.96 Ω。MnS@C combined with carbon nanotubes for enhanced performance sodium-
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电极的斜率比 MnS 电极的斜率更大 [27] 。上述结果与 2018, 735: 1306-1313.
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无定形多孔碳的存在有关，无定形多孔碳的存在阻 microspheres on reduced graphene oxide sheets as high-capacity and
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止了 MnS 纳米粒子的聚集，从而保证结构完整性， & Interfaces, 2015, 7: 20957-20964.
表明材料具有优异的循环稳定性。较大的比表面积 [13] ZHAO X Y, TAN W B, DANG Q L, et al. Enhanced biotic
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点，有效地缩短了 Li 的传输路径，赋予了 MnS@C [14] HUCULAK-MACZKA M, HOFFMANN K, HOFFMANN J, et al.
Evaluation of the possibilities of using humic acids obtained from
复合材料良好的储锂性能，显著提高了材料的电导率。 lignite in modern water treatment[J]. Desalination and Water
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2+
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6.57%的氮原子。氧原子和氮原子具有较强的电负性， [16] ZHENG L C (郑李纯), LI C (李超), XU L (许力), et al. Adsorption
+
Li 的吸附能力较强，有利于提高材料的储锂能力。 behavior of residue of lignitic coal after extracting humic acid for Cr
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[17] DENG S J, CHAO D L. Vertical graphene/Ti 2Nb 10O 29/hydrogen
3 结论 molybdenum bronze composite arrays for enhanced lithium ion
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利用褐煤提取腐植酸后的残渣为碳源，成功制 encapsulated within a carbon shell as a free-standing cathode for
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备了 MnS@C 复合材料。MnS@C 复合材料作为锂 11169-11174.
[19] LI Z, HU X W, SHI Z N. MOFs-derived metal oxides inlayed in
离子电池的负极材料与 MnS 相比，展现出高达 carbon nanofibers as anode materials for high-performance lithium-
830 mA·h/g 的放电比容量，具有良好循环稳定性和 ion batteries[J]. Applied Surface Science, 2020, 30: 147290.
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优异的倍率性能。这些优异的电化学性能与特殊结 α-MnS coaxial nanocables embedded in N, S co-doped graphene
foam as 3D hierarchically ordered electrodes for enhanced lithium
构多孔碳的引入有关，分级多孔碳可以充分缓解 storage[J]. Energy Storage Materials, 2019, 16: 46-55.
[21] LIU B L, LIU Z J, LI D, et al. Nanoscale α-MnS crystallites grown
MnS 纳米粒子的体积膨胀，阻止其在循环过程中的 on N-S co-doped rGO as a long-life and high-capacity anode material
团聚，从而加速离子/电子转移，提高导电性和循环 of Li-ion batteries[J]. Applied Surface Science, 2017, 416: 858-867.
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为锂离子电池负极材料的制备提供了较好的思路。 MnS/Co 1–xS nanoparticles in porous carbon/graphene for superior
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