Supramolecule-assisted synthesis of in-situ carbon-coated MnO2 nanosphere for supercapacitors
Supramolecule-assisted synthesis of in-situ carbon-coated MnO2 nanosphere for supercapacitors
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超分子辅助原位合成碳包覆MnO2纳米球用于超级电容器
DOI：
10.1016/j.jallcom.2018.11.243
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发表时间：
2019-03
影响因子：
6.2
通讯作者：
Zeng Depeng
中科院分区：
文献类型：
--
作者：
Cheng Honghong;Zhao Shixu;Yi Fenyun;Gao Aimei;Shu Dong;Ao Zhuoran;Huang Shijian;Zhou Xiaoping;He Chun;Li Shaoying;Zeng Depeng
受超分子化学组装理论的启发，采用两步法制备了碳包覆MnO2纳米球(C@MnO2)。首先，用β-环糊精包合醋酸锰制得超分子溶液，然后经水热反应和焙烧得到超分子溶液。扫描电子显微镜和透射电子显微镜照片表明，C@MnO2复合材料具有纳米球形结构，其中由β-环糊精碳化生成的碳层均匀地包裹在MnO2纳米颗粒上。通过恒电流充放电(GCD)、循环伏安(CV)和交流阻抗谱(EIS)测试了其电化学性能。结果表明，C@MnO2具有较高的比电容(396.4 F g−1 at 2 A g−1)和良好的倍率性能。此外，在10000次循环后，初始比容量仍保持在84.1%，表现出良好的电化学稳定性。C@MnO2优异的电化学性能归功于其突出的均匀纳米球结构，促进了离子的迁移率，以及导电碳和伪电容MnO2之间的协同效应。因此，C@MnO2可以作为一种潜在的候选材料应用于超级电容器。
Inspired by the supramolcular chemistry assembly theory, carbon-coated MnO2nanospheres (C@MnO2) were successfully synthesized by a two-step method. First, the supramolecular solution was prepared by β-cyclodextrin inclusion of manganese acetate, which was then treated by a hydrothermal reaction and the calcination in the following. The scan electron microscopy (SEM) and transmission electron microscopy (TEM) images present that the C@MnO2composites have the nanosphere morphology, in which the carbon layer originated from the carbonization of β-cyclodextrin was uniformly coated on the MnO2nanoparticles. The electrochemical characteristics were examined by galvanostatic charge-discharge (GCD), cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS). The results demonstrated that C@MnO2exhibited high specific capacitance (396.4 F g−1at 2 A g−1) and good rate capability. In addition, 84.1% of the initial capacitance was maintained after 10000 cycles, indicating the excellent electrochemical stability. The superior electrochemical performance of the C@MnO2was attributed to the outstanding uniform nanospheres structure that facilitates ion mobility and the synergistic effect between conductive carbon and pseudocapacitive MnO2. Hence, C@MnO2can be a potential candidate material for the applications in supercapacitors.
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影响因子：
3
作者：
Weilu Liu;Cong Li;Yue Gu;L. Tang;Zhiquan Zhang;Ming Yang
通讯作者：
Weilu Liu;Cong Li;Yue Gu;L. Tang;Zhiquan Zhang;Ming Yang
电化学合成用于柔性全固态超级电容器的MnO2多孔纳米线
影响因子：
3.3
作者：
Juan Song;Yuge Liu
通讯作者：
Yuge Liu
影响因子：
3.7
作者：
Jintao Zhang;Jianwen Jiang;X. Zhao
通讯作者：
Jintao Zhang;Jianwen Jiang;X. Zhao
影响因子：
2.1
作者：
Fitri Nur Indah Sari;Hs Lin;J. Ting
通讯作者：
Fitri Nur Indah Sari;Hs Lin;J. Ting
DOI：
10.1016/j.msec.2014.03.027
发表时间：
2014-06
期刊：
Materials science & engineering. C, Materials for biological applications
影响因子：
--
作者：
Tie Li;Jianfeng Shen;Na Li;M. Ye
通讯作者：
Tie Li;Jianfeng Shen;Na Li;M. Ye