Engineering Optimized Defects and Abundant Closed‐Pores of Hard Carbons for Enhanced Sodium Storage
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Le résumé fourni par la source
Abstract Hard carbons (HCs) are widely regarded as promising anode materials for sodium‐ion batteries, but their application is confined by low initial coulombic efficiency (ICE) as well as poor specific capacity. Herein, a one‐stone‐for‐two‐birds strategy is proposed to optimize defect concentration and engineer closed pores in HCs via the introduction of Zn. The resulting HCs demonstrated a satisfactory ICE (82.1%) and an excellent storage capacity (446.3 mAh g −1 ). A fraction of Zn anchored by nitrogen in resin precursor effectively regulated the optimized defect concentration in HCs, thus mitigating side reactions with the electrolyte with high ICE. In the meantime, the volatilization of the remaining Zn generated closed pores during pyrolysis, providing abundant sodium storage sites and significantly increasing the specific capacity. It is revealed that the inorganic‐rich solid‐electrolyte interfaces are formed onto the modified HCs, which suppressed electrolyte decomposition and further raised the ICE. Additionally, it is found that Zn‐single atoms facilitated the diffusion of Na + , especially in the low‐voltage plateau region, contributing to enhanced plateau capacity. As a result, it is demonstrated in this study that the high sodium storage capacity of the HCs originated from a pore‐filling mechanism in the closed pores.
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Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Engineering Optimized Defects and Abundant Closed‐Pores of Hard Carbons for Enhanced Sodium Storage
- Date Crossref
- 28/07/2025
- Éditeur
- Wiley
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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Xi’an University Institute of Advanced Electrochemical Energy & pays non établi dans la noticeUniversité ou école supérieure
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Xi'an University of Technology pays non établi dans la noticeUniversité ou école supérieure
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Shaanxi Engineering Research Center of Key Materials for Lithium/Sodium‐ion Batteries Xi'an 710048 P. R. China pays non établi dans la noticeStructure de recherche
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Guangdong Yuanneng Technologies Co Ltd Foshan Guangdong 528223 P. R. China pays non établi dans la noticeEntreprise
Institute of Advanced Electrochemical Energy & — Xi’an University, Xi'an University of Technology et Shaanxi Engineering Research Center of Key Materials for Lithium/Sodium‐ion Batteries Xi'an 710048 P. R. China, avec 1 autre affiliation.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.