基于可再生和可生物降解的介孔纤维素膜的高性能，柔性，固态超级电容器,Advanced Energy Materials

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基于可再生和可生物降解的介孔纤维素膜的高性能，柔性，固态超级电容器
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2017-05-23 , DOI: 10.1002/aenm.201700739
Dawei Zhao ₁ , Chaoji Chen ₂ , Qi Zhang ₁ , Wenshuai Chen ₁ , Shouxin Liu ₁ , Qingwen Wang ₁ , Yixing Liu ₁ , Jian Li ₁ , Haipeng Yu ₁

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通过简便且可扩展的溶液相转化工艺，制备出具有约24.7 nm的均匀中孔和71.78％的高孔隙率的柔性，透明且可再生的中孔纤维素膜（mCel-膜）。KOH饱和的mCel膜作为聚合物电解质表现出451.2 wt％的高电解质保留率，0.325 S cm ^-1的高离子电导率以及出色的机械柔韧性和耐用性。使用活性炭作为电极的固态双电层电容器（EDLC），饱和KOH的mCel膜作为聚合物电解质，在1.0 A g ^-1时表现出110 F g ^-1的高电容，具有10,000个循环的长循环寿命，电容保持率为84.7％。此外，可以通过将电极材料直接沉积在基于mCel膜的聚合物电解质上而无需使用复杂的设备来轻松制造高度集成的平面型微型超级电容器（MSC）。所得的MSC在10 mV s ^-1下具有153.34 mF cm ^-2的高面积电容和191.66 F cm ^-3的体积电容，是所有碳基MSC器件中最高的值之一。这些发现表明，开发的可再生，柔性，中孔纤维素膜在不限于超级电容器的柔性，固态，便携式储能装置的实际应用中具有广阔的前景。

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High Performance, Flexible, Solid‐State Supercapacitors Based on a Renewable and Biodegradable Mesoporous Cellulose Membrane

A flexible, transparent, and renewable mesoporous cellulose membrane (mCel‐membrane) featuring uniform mesopores of ≈24.7 nm and high porosity of 71.78% is prepared via a facile and scalable solution‐phase inversion process. KOH‐saturated mCel‐membrane as a polymer electrolyte demonstrates a high electrolyte retention of 451.2 wt%, a high ionic conductivity of 0.325 S cm⁻¹, and excellent mechanical flexibility and robustness. A solid‐state electric double layer capacitor (EDLC) using activated carbon as electrodes, the KOH‐saturated mCel‐membrane as a polymer electrolyte exhibits a high capacitance of 110 F g⁻¹ at 1.0 A g⁻¹, and long cycling life of 10 000 cycles with 84.7% capacitance retention. Moreover, a highly integrated planar‐type micro‐supercapacitor (MSC) can be facilely fabricated by directly depositing the electrode materials on the mCel‐membrane‐based polymer electrolyte without using complicated devices. The resulting MSC exhibits a high areal capacitance of 153.34 mF cm⁻² and volumetric capacitance of 191.66 F cm⁻³ at 10 mV s⁻¹, representing one of the highest values among all carbon‐based MSC devices. These findings suggest that the developed renewable, flexible, mesoporous cellulose membrane holds great promise in the practical applications of flexible, solid‐state, portable energy storage devices that are not limited to supercapacitors.

更新日期：2017-05-23

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