In Situ Grown Ultrafine RuO2 Nanoparticles on GeP5 Nanosheets as the Electrode Material for Flexible Planar Micro-Supercapacitors with High Specific Capacitance and Cyclability
In Situ Grown Ultrafine RuO2 Nanoparticles on GeP5 Nanosheets as the Electrode Material for Flexible Planar Micro-Supercapacitors with High Specific Capacitance and Cyclability
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GeP5 纳米片上原位生长的超细 RuO2 纳米颗粒作为具有高比电容和循环能力的柔性平面微型超级电容器的电极材料
DOI：
10.1021/acsami.1c12549
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发表时间：
2021-10-01
影响因子：
9.5
通讯作者：
Tian, Yongjun
中科院分区：
文献类型：
--
作者：
Chang, Yukai;Li, Penghui;Tian, Yongjun
GeP5作为二维层状磷化合物中最具代表性的磷基材料，由于其超高的电导率，在储能领域显示出相当光明的应用前景。然而，对于GeP5纳米片材的高效剥离方法和有效的结构构建策略仍然缺乏，这完全限制了GeP5基纳米复合材料的进一步应用。在这里，我们不仅通过液氮辅助的液相剥离技术提高了GeP5纳米片的产率，而且通过一种简单的水热合成方法在高导电的GeP5纳米片上原位引入超细RuO2纳米颗粒，然后将其应用于微超级电容器(MSCs)作为电极材料，通过掩膜辅助真空过滤技术构建了具有0D/2D异质结构的GeP5@RuO2纳米复合材料。正是由于双电层材料、GeP5纳米片和伪电容材料RuO2纳米颗粒的协同作用，使GeP5@RuO2电极在微型超级电容器中具有优异的电化学性能，具有129.5 mF cm(-2)/107.9 F cm(-3)的大容量，17.98muWH cm(-2)的高能量密度，显著的长期循环稳定性，10000次循环后的容量保持率为98.4%，出色的机械稳定性，出色的环境稳定性，以及良好的集成特性。这项工作为构建GeP5基纳米复合材料开辟了一条新的途径，使其成为一种最有前途的新型电极材料，可用于柔性便携式/可穿戴微纳电子器件。
GeP5, as the most representative phosphorus-based material in two-dimensional layered phosphorous compounds, has shown a fairly bright application prospect in the field of energy storage because of its ultrahigh electrical conductivity. However, high-yield exfoliation methods and effective structure construction strategies for GeP5 nanosheets are still missing, which completely restricts the further application of GeP5-based nanocomposites. Here, we not only improved the yield of GeP5 nanosheets by a liquid nitrogen-assisted liquid-phase exfoliation technique but also constructed the GeP5@RuO2 nanocomposites with the 0D/2D heterostructure by in situ introduction of ultrafine RuO2 nanoparticles on highly conductive GeP5 nanosheets using a simple hydrothermal synthesis method, and then applying it to microsupercapacitors (MSCs) as electrode materials through a mask-assisted vacuum filtration technique. It is precisely because of the synergy of the electrical double-layer material, GeP5 nanosheets and the pseudocapacitance material RuO2 nanoparticles that endows the GeP5@ RuO2 electrode with outstanding electrochemical performance in micro-supercapacitors with a large specific capacitance of 129.5 mF cm(-2)/107.9 F cm(-3), high energy density of 17.98 mu Wh cm(-2), remarkable long-term cycling stability with 98.4% capacitance retention after 10 000 cycles, the exceptional mechanical stability, outstanding environmental stability, and excellent integration features. This work opens up a new avenue to construct GeP5-based nanocomposites as a most promising novel electrode material for practical application in flexible portable/wearable micro-nanoelectronic devices.