通过超快激光 MoCl5 前体辅助碳化制备混合超级电容器以提高电容性能,Advanced Functional Materials

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通过超快激光 MoCl5 前体辅助碳化制备混合超级电容器以提高电容性能
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2023-03-08 , DOI: 10.1002/adfm.202213514
Heng Guo ₁ , Ming Qiao ₁ , Jianfeng Yan ₁ , Lan Jiang ₂ , Jiachen Yu ₁ , Jiaqun Li ₁ , Shengfa Deng ₁ , Liangti Qu ₃

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混合超级电容器使用双电层电容和法拉第赝电容作为能量存储机制。这种类型的超级电容器正在成为下一代储能设备的主要候选者，在能量密度、比电容和生命周期方面具有优势。然而，减少电极面积和增加混合超级电容器的比电容仍然具有挑战性。在这项研究中，提出了一种 MoCl _{5前驱体辅助超快激光碳化 (MPAULC) 方法来制造具有更高电容和更小尺寸的对称混合超级电容器。}_{该方法使用超快激光诱导碳/MoO 3}的形成在 MoCl5 前体的帮助下复合。这种超快激光碳化方法具有很高的加工精度。使用时间分辨成像和温度计算研究前体在激光加工中的作用。_{C/MoO 3}混合超级电容器的比表面积电容为11.85 mF cm ^-2，比没有前驱体的激光诱导碳超级电容器高9.2倍。MPAULC 方法为在聚合物基板上制造具有碳/金属氧化物复合电极的小型化混合超级电容器提供了可靠途径。

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Fabrication of Hybrid Supercapacitor by MoCl5 Precursor-Assisted Carbonization with Ultrafast Laser for Improved Capacitance Performance

Hybrid supercapacitors use electric double-layer capacitance and Faradaic pseudocapacitance as energy storage mechanisms. This type of supercapacitor is becoming a prime candidate for next-generation energy storage devices, with advantages in terms of energy density, specific capacitance, and life cycle. However, reducing the electrode area and increasing the specific capacitance of hybrid supercapacitors remain challenging. In this study, a MoCl₅ Precursor-assisted Ultrafast Laser Carbonization (MPAULC) method to fabricate symmetric hybrid supercapacitors with improved capacitance and reduced size is proposed. The method uses an ultrafast laser to induce the formation of carbon/MoO₃ composite with the assistance of the MoCl5 precursor. This ultrafast laser carbonization method exhibited high processing precision. The role of the precursor in laser processing is studied using time-resolved imaging and temperature calculations. The specific area capacitance of the C/MoO₃ hybrid supercapacitor is 11.85 mF cm⁻², 9.2 times higher than that of the laser-induced carbon supercapacitor without precursor. The MPAULC method provides a reliable pathway for fabricating miniaturized hybrid supercapacitors with carbon/metal oxide composite electrodes on polymer substrates.

更新日期：2023-03-08

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