All‐Printed MnHCF‐MnOx‐Based High‐Performance Flexible Supercapacitors,Advanced Energy Materials

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All‐Printed MnHCF‐MnOx‐Based High‐Performance Flexible Supercapacitors
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2020-02-13 , DOI: 10.1002/aenm.202000022
Jing Liang ₁ , Bin Tian ₁ , Shuaiqi Li ₁ , Changzhong Jiang ₂ , Wei Wu ₁

Affiliation

Here, a simple active materials synthesis method is presented that boosts electrode performance and utilizes a facile screen‐printing technique to prepare scalable patterned flexible supercapacitors based on manganese hexacyanoferrate‐manganese oxide and electrochemically reduced graphene oxide electrode materials (MnHCF‐MnO_x/ErGO). A very simple in situ self‐reaction method is developed to introduce MnO_x pseudocapacitor material into the MnHCF system by using NH₄F. This MnHCF‐MnO_x electrode materials can deliver excellent capacitance of 467 F g⁻¹ at a current density of 1 A g⁻¹, which is a 2.4 times capacitance increase compared to MnHCF. In addition a printed, patterned, flexible MnHCF‐MnO_x/ErGO supercapacitor is fabricated, showing a remarkable areal capacitance of 16.8 mF cm⁻² and considerable energy and power density of 0.5 mWh cm⁻² and 0.0023 mW cm⁻², respectively. Furthermore, the printed patterned flexible supercapacitors also exhibit exceptional flexibility, and the capacitance remains stable, even while bending to various angles (60°, 90°, and 180°) and for 100 cycles. The flexible supercapacitor arrays integrated by multiple prepared single supercapacitors can power various LEDs even in the bent states. This approach offers promising opportunities for the development of printable energy storage materials and devices with high energy density, large scalability, and excellent flexibility.

中文翻译：

全印制基于MnHCF-MnOx的高性能柔性超级电容器

在这里，提出了一种简单的活性材料合成方法，该方法可提高电极性能并利用便捷的丝网印刷技术，以六氰合铁酸锰-氧化锰和电化学还原的氧化石墨烯电极材料（MnHCF-MnO _x / ErGO）制备可缩放的图案化柔性超级电容器。。开发了一种非常简单的原位自反应方法，通过使用NH ₄ F将MnO _x伪电容器材料引入MnHCF系统。这种MnHCF-MnO _x电极材料在电流密度为1时可提供467 F g ^-1的出色电容。A g ^-1，这是MnHCF电容的2.4倍。此外，还制作了印刷的，有图案的，柔性的MnHCF-MnO _x / ErGO超级电容器，显示出出色的面积电容为16.8 mF cm ^-2，可观的能量和功率密度分别为0.5 mWh cm ^-2和0.0023 mW cm ^-2，分别。此外，即使弯曲到各种角度（60°，90°和180°）并持续100个循环，印刷的带图案的柔性超级电容器也具有出色的柔性，并且电容保持稳定。由多个准备好的单个超级电容器集成的柔性超级电容器阵列即使在弯曲状态下也可以为各种LED供电。这种方法为开发具有高能量密度，大可扩展性和出色灵活性的可印刷储能材料和设备提供了广阔的机遇。

更新日期：2020-03-27

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