电化学储能虚拟专辑代表性论文3:溶液法热剥离温度对制备石墨烯纳米片形貌及超电容性能影响研究

 

利用热氧化剥离石墨的方法制备了大批量石墨烯纳米片(GS)并用作超级电容器电极材料。分析了不同热剥离温度对其超...



【引言】西南科技大学彭同江教授课题组利用热氧化剥离石墨的方法制备了大批量石墨烯纳米片(GS)并用作超级电容器电极材料。分析了不同热剥离温度对其超容性能的影响,结果表明,随着热还原温度增高,GS堆垛层和无序度增加而表面氧化基团数量、比表面积和电导率降低。热剥离温度为673 K,GS的超容性能(达到233.1 F g-1),倍率性能和循环稳定性最佳。研究结果发表于Nano-Micro Letters上2015年第7卷第一期.

全文链接:http://link.springer.com/article/10.1007%2Fs40820-014-0014-4
文章引用信息:Haiyang Xian   Tongjiang Peng   Hongjuan Sun   Jiande Wang,The Effect of Thermal Exfoliation Temperature on the Structure and Supercapacitive Performance of Graphene Nanosheets.Nano-Micro Lett. (2015) 7(1):17–26,http://dx.doi.org/doi:10.1007/s40820-014-0014-4.【图文导读】



Fig. 1 SEM images of XHGS-673 (a, b), HRTEM images of XHGS-673 (c, d), and the inset of d shows the corresponding SAED pattern.



Fig. 2 a) N2 adsorption–desorption isotherms of graphene nanosheets and b) BJH pore size distributions from adsorption branches for graphene nanosheets.



Fig. 3 XRD patterns of XHG, XHGO, and XHGS-n samples, the inset is the enlarged map of the XHGS-n samples.



Fig. 4 FT-IR spectra of XHG, XHGO, and XHGS-n samples.



Fig. 5 Raman spectra of XHG, XHGO, and XHGS-n samples.



Fig. 6 Cyclic voltammograms of XHGS-n (a–e) at different scan rates (from 5 to 50 mV s-1) and comparison of specific capacitance values with increasing scan rates for XHGS-n (f).



Fig. 7 a) The first galvanostatic charge/discharge cycling curves for XHGS-n at a current density of 0.5 A g-1, b galvanostatic charge/discharge cycling curves for XHGS-673 at various current densities from 0.5 to 5.0 A g-1, c the specific capacitances of XHGS-n electrodes at various current densities from 0.5 to 5.0 A g-1, and d capacitance curves of XHGS-673 under a current density of 0.5 A g-1, the inset of d shows the comparison of galvanostatic charge/discharge curves between 1st and 601st cycles for XHGS-673.



Fig. 8 a) Nyquist impedance plots, b) the relationship between the real capacitance and frequency, c) the relationship between the imaginary capacitance and frequency, and d) the variation of the relaxation time with the heating temperature.



电化学储能虚拟专辑
---Nano-Micro Letters
本期虚拟专辑主要介绍Nano-Micro Letters近两年在电化学储能领域(包括锂离子电池和超级电容器)的9篇代表性论文,敬请阅读并下载(免费),并欢迎投稿。

代表性论文:

1. 通过WO3纳米结构调控提高其锂电池阳极电化学性能,链接http://dx.doi.org/10.1007/s40820-014-0013-5

2. 导电介质(粒状乙炔黑/碳纳米管)和阳极材料(Fe3O4)形貌对电化学储锂电性能的影响研究,链接http://dx.doi.org/10.1007/s40820-015-0051-7

3. 溶液法热剥离温度对制备石墨烯纳米片形貌及超电容性能影响研究,链接http://dx.doi.org/10.1007/s40820-014-0014-4

4. 多孔Zn-Sn-O纳米立方的简易合成及电化学储锂性能研究,链接http://dx.doi.org/10.1007/s40820-015-0075-z

5. 空心碳球/MnO2纳米片复合材料的水热合成及多孔电化学性能,链接http://dx.doi.org/10.1007/s40820-014-0019-z

6. 热解法制备新型氮化钒(VN)/多孔碳复合纳米颗粒并用于对称超级电容器阳极材料,链接http://dx.doi.org/10.1007/s40820-016-0105-5

7. 溶剂热+电沉积合成Co3O4@PPy核壳复合纳米片阵列用于高性能超级电容器电极材料,链接http://dx.doi.org/10.1007/s40820-015-0069-x

8.一步无模板电化学沉积方法制备Mn3O4纳米结构用于超级电容器电极材料,链接http://dx.doi.org/10.1007/s40820-015-0074-0

9. 基于纸质基体的铅笔画-沉积聚吡咯方法制备高性能固态超级电容器,链接http://dx.doi.org/0.1007/s40820-015-0039-3

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