<br>偕胺肟化木材衍生碳作为超级电容器和水分解的先进自立式电极,Advanced Functional Materials

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偕胺肟化木材衍生碳作为超级电容器和水分解的先进自立式电极
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2024-05-09 , DOI: 10.1002/adfm.202400964
Liu‐Liu Shen ₁ , Xiangzun Dong ₁ , Wei Wang ₂ , Hui Yu ₂ , Peiran Wu ₂ , Jiansong Wang ₂ , Yipu Xu ₂ , Xuanxuan Cui ₃ , Xinkun Li ₁ , Gui‐Rong Zhang ₃ , Donghai Mei _{2,

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木材衍生的碳在能量存储/转换应用（包括超级电容器和水分解装置）中作为自立式电极表现出巨大的潜力。然而，关键的挑战仍然是合理定制表面功能以优化性能。这项研究介绍了一种具有定制氮和金属功能的自立式木材衍生碳的创新方法。与表面改性精度有限的传统浸渍技术相比，这种方法需要有意将偕胺肟基团附着在木质基材上。这些基团充当氮源，并由于偕胺肟基团和金属之间的螯合而为金属离子创造丰富的表面锚定位点。所得碳具有均匀且高度分散的氮和金属官能团，以及将互连的开放通道与丰富的介孔相结合的独特的分级孔隙率。作为概念验证，将不同的金属（即锰、钴、镍）掺入偕胺肟化木材前体中，所得的自支撑碳在超级电容器和水分解应用中表现出优异的性能。利用偕胺肟基团对金属离子的特定螯合能力，该策略作为一种通用方法具有巨大的潜力，可以系统地定制碳基材料的表面功能，用于各种电化学能量存储/转换过程。

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Amidoximated-Wood Derived Carbons as Advanced Self-Standing Electrodes for Supercapacitor and Water Splitting

Wood-derived carbons demonstrate great potential as self-standing electrodes in energy storage/conversion applications, including supercapacitors and water-splitting devices. However, the key challenge remains the rational customization of surface functionalities for optimized performance. This study introduces an innovative approach to self-standing wood-derived carbons with tailored nitrogen and metal functionalities. In contrast to traditional impregnation techniques, which offer limited precision in surface modification, this approach entails the intentional attachment of amidoxime groups to the wood substrates. These groups serve as nitrogen sources, and create abundant surface anchoring sites for metal ions due to the chelation between the amidoxime groups and metals. The resulting carbons feature uniform and high dispersion of nitrogen and metal functionalities, along with a distinctive hierarchical porosity combining interconnected open channels with abundant mesopores. As a proof-of-concept, different metals are incorporated (i.e., Mn, Co, Ni) into the amidoximated-wood precursors, and the resulting self-standing carbons showcase excellent performance in both supercapacitors and water-splitting applications. Leveraging the specific chelating ability of amidoxime groups toward metal ions, this strategy holds great potential as a generic approach to systematically tailoring the surface functionalities of carbon-based materials for various electrochemical energy storage/conversion processes.

更新日期：2024-05-09

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