Important effect of Pt modification at the collector/active material interface of flexible micro-supercapacitors

Important effect of Pt modification at the collector/active material interface of flexible micro-supercapacitors
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Pt修饰对柔性微型超级电容器集流体/活性材料界面的重要影响

DOI:
10.1016/j.apsusc.2018.06.144
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发表时间:
2018-10
影响因子:
6.7
通讯作者:
Dai Ye
Dai Ye
中科院分区:
材料科学1区
文献类型:
--
作者:
Tao Shengying;Zeng Zhigang;Shi Xiaobo;Liao Chujian;Guo Erjuan;Long Xiao;Zhou Haijun;Wang Xiaohong;Deng Dongmei;Dai Ye

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集流体/活性材料的界面修饰对于提高微型超级电容器(MSC)的性能非常重要。在这项研究中,我们报告称,仅通过在金集流体上添加少量的 Pt 改性,MnO2 基 MSC 的性能就得到了极大的提高。 MSC 在聚对苯二甲酸乙二醇酯 (PET) 基底上以叉指平面形式制造。 LiCl-聚乙烯醇(PVA)被用作固体电解质来制造这些全固态柔性MSC。 Pt修饰的MnO2/Pt@Au/PET MSC的面积比电容比未修饰的MnO2/Au/PET MSC高两倍以上。 MnO2/Pt@Au MSC具有相对较高的能量密度范围为0.36至0.88μWhcm−2,功率密度范围为0.04至0.16mWcm−2。此外,MnO2/Pt@Au/PET MSC表现出优异的长期循环稳定性,在5000次恒电流充电/放电循环后几乎没有性能衰减。我们的结果表明,集流体/活性材料的界面修饰应受到足够的重视,以优化和提高 MSC 的存储性能和稳定性。
The interface modification of collector/active materials is important for enhancing the performance of micro-supercapacitors (MSCs). In this study, we report that the performance of MnO2based MSCs is greatly improved only by adding a small amount of Pt modification on Au current collector. The MSCs were fabricated in the interdigitated planar form on polyethylene terephthalate (PET) substrate. LiCl-polyvinyl alcohol (PVA) was used as solid electrolyte to make these all-solid-state flexible MSCs. The area specific capacitance of Pt modified MnO2/Pt@Au/PET MSCs are more than two times higher than those of MnO2/Au/PET MSCs without Pt modification. MnO2/Pt@Au MSCs has relatively higher energy density ranges from 0.36 to 0.88 μWh cm−2and power density ranges from 0.04 to 0.16 mW cm−2. In addition, the MnO2/Pt@Au/PET MSCs showed excellent long-term cycling stability with nearly no performance attenuation after 5000 times of galvanostatic charge/discharge cycles. Our results indicate that the interface modification of collector/active materials should receive sufficient attention to optimize and improve the storage performance and stability for MSCs.
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