Facile synthesis of MXene/MnO2 composite with high specific capacitance
Facile synthesis of MXene/MnO2 composite with high specific capacitance
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轻松合成具有高比电容的 MXene/MnO2 复合材料
DOI：
10.1007/s10008-018-4143-4
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发表时间：
--
影响因子：
2.5
通讯作者：
Guofu Ma
中科院分区：
文献类型：
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作者：
Qingtao Wang;Zhonghao Zhang;Zhao Zhang;Xiaozhong Zhou;Guofu Ma
Ti3C2Tx是一种典型的MXene材料，其中Tx代表各种表面末端（OH， O和/或F基团）。本文采用简单的合成方法制备了分层Ti3C2Tx （d-Ti3C2Tx）和MnO2复合材料。复合材料的衬底是导电的d-Ti3C2Tx片材。MnO2生长在d-Ti3C2Tx表面，可以提高复合材料的比电容。同时，d-Ti3C2Tx衬底可以为MnO2的生长和均匀分散提供载体。因此，d-Ti3C2Tx/MnO2复合材料具有较高的比电容和良好的循环稳定性。在电流密度为1 a g−1时，d-Ti3C2Tx/MnO2复合材料的比电容为242 F g−1，是Ti3C2Tx的3倍。经5000次恒流充放电后，电极电容保持率仍可达97%。
Ti3C2Tx is one of the typical MXene materials, where Tx stands for various surface terminations (OH, O, and/or F groups). In this paper, the delaminated Ti3C2Tx, referred to as d-Ti3C2Tx, and MnO2 composites were prepared by a simple synthesis method. The substrate of the composite is the conductive d-Ti3C2Tx sheet. The MnO2 was grown on the surface of d-Ti3C2Tx and it can increase the specific capacitance of the composite. At the same time, the d-Ti3C2Tx substrate can provide a carrier for the growth and uniform dispersion of MnO2. Therefore, the d-Ti3C2Tx/MnO2 composite has high specific capacitance and good cycle stability. At a current density of 1 A g−1, the d-Ti3C2Tx/MnO2 composite has a specific capacitance of 242 F g−1, which is three times than that of Ti3C2Tx. The electrode capacitance retention rate can still reach 97% after 5000 cycles of galvanostatic charge and discharge.