Boosting Surface‐Dominated Sodium Storage of Carbon Anode Enabled by Coupling Graphene Nanodomains, Nitrogen‐Doping, and Nanoarchitecture Engineering. (21st June 2022)

• Record Type: Journal Article
• Authors: Huang, Si; Yang, Dongjie; Qiu, Xueqing; Zhang, Wenli; Qin, Yanlin; Wang, Caiwei; Yi, Conghua
• Is Part Of: Advanced functional materials. Volume 32:Number 33(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-06-21
• Subjects: anodes -- in situ polycondensation -- lignin‐derived carbon -- nitrogen doping -- sodium‐ion batteries; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adfm.202203279
• Languages: English
• ISSNs: 1616-301X

Abstract

Abstract: The development of high‐performance carbon anode for sodium‐ion batteries is limited by the sluggish kinetics and structural instability. Expanded interlayer spacing, nitrogen doping, and mesoporous structure engineering have emerged as promising strategies to overcome these challenges. Simultaneously achieving graphene nanodomains construction, high‐efficient nitrogen doping, and rational mesoporous structure engineering is challenging. Herein, a strategy of pyrolyzing SiO2 @ lignin amine urea‐formaldehyde resin is proposed for deliberate manipulation of graphene nanodomains, edge‐nitrogen doping, and specific mesoporous distribution in amorphous lignin‐derived carbon based on polycondensation‐template. The obtained carbon material exhibits a nitrogen‐doping level of 6.03 at% with a high edge‐nitrogen ratio of up to 84.4%, high‐ connectivity mesoporous structure, and graphene nanodomains with expanded interlayer spacing. The optimized carbon material delivers a reversible capacity of 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‐ion storage mechanism is identified by in situ electrochemical impedance spectroscopy. Furthermore, the optimized carbon can function as an outstanding anode for full cells. This work proposes a new avenue for designing high‐performance carbon for low‐cost and high‐rate sodium‐ion batteries. Abstract : A strategy of in situ polycondensation and electrostatic dispersing SiO2 is proposed for simultaneously manipulating expanded interlayer spacing, high edge‐nitrogen doping, and highly connective mesoporous structure in amorphous carbon. The optimized carbon anode exhibits excellent sodium storage performance. This work proposes a general strategy to synthesize nitrogen‐doped mesoporous carbon for boosting surface‐dominated Na‐ion storage.