Boosting Surface-Dominated Sodium Storage of Carbon Anode Enabled by Coupling Graphene Nanodomains, Nitrogen-Doping, and Nanoarchitecture Engineering

Si Huang; Dongjie Yang; Xueqing QiuWenli ZhangYanlin QinCaiwei WangConghua Yi

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Boosting Surface-Dominated Sodium Storage of Carbon Anode Enabled by Coupling Graphene Nanodomains, Nitrogen-Doping, and Nanoarchitecture Engineering

机译：Boosting Surface-Dominated Sodium Storage of Carbon Anode Enabled by Coupling Graphene Nanodomains, Nitrogen-Doping, and Nanoarchitecture Engineering

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The development of high-performance carbon anode for sodium-ion batteriesis limited by the sluggish kinetics and structural instability. Expanded interlayerspacing, nitrogen doping, and mesoporous structure engineering have emergedas promising strategies to overcome these challenges. Simultaneously achievinggraphene nanodomains construction, high-efficient nitrogen doping, andrational mesoporous structure engineering is challenging. Herein, a strategyof pyrolyzing SiO_2@ lignin amine urea-formaldehyde resin is proposed fordeliberate manipulation of graphene nanodomains, edge-nitrogen doping, andspecific mesoporous distribution in amorphous lignin-derived carbon based onpolycondensation-template. The obtained carbon material exhibits a nitrogendopinglevel of 6.03 at with a high edge-nitrogen ratio of up to 84.4, highconnectivitymesoporous structure, and graphene nanodomains with expandedinterlayer spacing. The optimized carbon material delivers a reversible capacityof 234 mAh g~(?1) at 100 mA g~(?1), superior rate capability of 129 mAh g~(?1) at 2 A g~(?1),and excellent cycling stability. In addition, the surface-dominated sodium-ionstorage mechanism is identified by in situ electrochemical impedance spectroscopy.Furthermore, the optimized carbon can function as an outstanding anodefor full cells. This work proposes a new avenue for designing high-performancecarbon for low-cost and high-rate sodium-ion batteries.

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《Advanced functional materials》 |2022年第33期|2203279.1-2203279.9|共9页
作者
Si Huang; Dongjie Yang; Xueqing QiuWenli ZhangYanlin QinCaiwei WangConghua Yi;
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School of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhou 510640, P. R. China,Guangdong Provincial Engineering Research Centerfor Green Fine ChemicalsSouth China University of TechnologyGuangzhou 510006, P. R. China;

School of Chemical Engineering and Light IndustryGuangdong University of TechnologyGuangzhou 510006, P. R. China;

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anodes; in situ polycondensation; lignin-derived carbon; nitrogendoping; sodium-ion batteries;

Boosting Surface-Dominated Sodium Storage of Carbon Anode Enabled by Coupling Graphene Nanodomains, Nitrogen-Doping, and Nanoarchitecture Engineering

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