用于高性能全固态超级电容器的柔性和独立式 MoS2 纳米片/碳纳米管/纤维素纳米纤维混合气凝胶薄膜,ACS Omega

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用于高性能全固态超级电容器的柔性和独立式 MoS2 纳米片/碳纳米管/纤维素纳米纤维混合气凝胶薄膜
ACS Omega ( IF 3.7 ) Pub Date : 2022-04-15 , DOI: 10.1021/acsomega.2c01815
Huanjun Chang ₁ , Longfei Zhang _{1,

2} , Shaoyi Lyu _{1,

2} , Siqun Wang ₃

Affiliation

二维材料组装的柔性超级电容器成为近年来的研究热点。在这里，我们制备了二维纳米材料MoS ₂和SWCNT、CNF气凝胶复合电极及其柔性全固态超级电容器。SWCNT可以抑制MoS ₂纳米片的堆积，提高复合电极的导电性。CNF可以提高MoS ₂和SWCNT的分散均匀性，赋予复合电极高比表面积（328.86 m ² g ^-1）和优异的柔韧性。_二硫化钼–SWCNT/CNF超级电容器具有良好的矩形CV曲线和对称三角形GCD曲线。^{即使在 2000 mV s –1}的扫描速率下， MoS ₂ -SWCNT 含量最高的 MoSCF3 超级电容器的 CV 曲线仍保持矩形。其电压窗口可达 1.5 V。MoS ₂ -SWCNT/CNF 超级电容器的比容量为 605.32 mF cm ^-2（扫描速率为 2 mV s ^-1）和 30.34 F g ^-1 (0.01 A g ^-1 )，面积比能量为 35.61 mWh cm ^–2（面积比能量为 0.03 mW cm ^–2)，以及极高的循环稳定性（10 000 次循环后的比容量保持率为 91.01%）和良好的柔韧性。精细的纳米复合结构赋予了MoS ₂ -SWCNT/CNF超级电容器令人印象深刻的电化学性能和优异的柔韧性，可用于便携式电子设备和柔性设备领域。

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Flexible and Freestanding MoS2 Nanosheet/Carbon Nanotube/Cellulose Nanofibril Hybrid Aerogel Film for High-Performance All-Solid-State Supercapacitors

Flexible supercapacitors assembled with two-dimensional materials have become a research hotspot in recent years. Here, we have prepared two-dimensional nanomaterial MoS₂ and SWCNT, CNF aerogel composite electrode, and its flexible all-solid-state supercapacitor. SWCNT can inhibit the accumulation of MoS₂ nanosheets and enhance the conductivity of the composite electrode. CNF can improve the dispersion uniformity of MoS₂ and SWCNT, and endow the composite electrode with a high specific surface area (328.86 m² g^–1) and excellent flexibility. MoS₂–SWCNT/CNF supercapacitor has a good rectangular CV curve and symmetrical triangular GCD curve. The CV curve of the MoSCF3 supercapacitor with the highest MoS₂–SWCNT content remains rectangular even at the scanning rate of 2000 mV s^–1. Its voltage window can reach 1.5 V. MoS₂–SWCNT/CNF supercapacitor has a specific capacity of 605.32 mF cm^–2 (scanning rate of 2 mV s^–1) and 30.34 F g^–1 (0.01 A g^–1), an area specific energy of 35.61 mWh cm^–2 (area specific power of 0.03 mW cm^–2), and extremely high cycle stability (91.01% specific capacity retention rate after 10 000 cycles) and good flexibility. The fine nanocomposite structure gives MoS₂–SWCNT/CNF supercapacitor impressive electrochemical performance and excellent flexibility, which can be used in the field of portable electronic devices and flexible devices.

更新日期：2022-04-15

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