Precisely Tunable Instantaneous Carbon Rearrangement Enables Low-Working-Potential Hard Carbon Toward Sodium-Ion Batteries with Enhanced Energy Density

Bibliographische Detailangaben
Veröffentlicht in:	Advanced materials (Deerfield Beach, Fla.). - 1998. - 36(2024), 44 vom: 16. Nov., Seite e2407369
1. Verfasser:	Liu, Junjie (VerfasserIn)
Weitere Verfasser:	You, Yiwei, Huang, Ling, Zheng, Qizheng, Sun, Zhefei, Fang, Kai, Sha, Liyuan, Liu, Miao, Zhan, Xiao, Zhao, Jinbao, Han, Ye-Chuang, Zhang, Qiaobao, Chen, Yanan, Wu, Shunqing, Zhang, Li
Format:	Online-Aufsatz
Sprache:	English
Veröffentlicht:	2024
Zugriff auf das übergeordnete Werk:	Advanced materials (Deerfield Beach, Fla.)
Schlagworte:	Journal Article Na‐ion battery low‐voltage discharge/charge plateaus metastable hard carbon transient high‐temperature pulse tunable local carbon phases

Beschreibung
Zusammenfassung:	© 2024 Wiley‐VCH GmbH. As the preferred anode material for sodium-ion batteries, hard carbon (HC) confronts significant obstacles in providing a long and dominant low-voltage plateau to boost the output energy density of full batteries. The critical challenge lies in precisely enhancing the local graphitization degree to minimize Na+ ad-/chemisorption, while effectively controlling the growth of internal closed nanopores to maximize Na+ filling. Unfortunately, traditional high-temperature preparation methods struggle to achieve both objectives simultaneously. Herein, a transient sintering-involved kinetically-controlled synthesis strategy is proposed that enables the creation of metastable HCs with precisely tunable carbon phases and low discharge/charge voltage plateaus. By optimizing the temperature and width of thermal pulses, the high-throughput screened HCs are characterized by short-range ordered graphitic micro-domains that possess accurate crystallite width and height, as well as appropriately-sized closed nanopores. This advancement realizes HC anodes with significantly prolonged low-voltage plateaus below 0.1 V, with the best sample exhibiting a high plateau capacity of up to 325 mAh g-1. The energy density of the HC\|\|Na3V2(PO4)3 full battery can therefore be increased by 20.7%. Machine learning study explicitly unveils the "carbon phase evolution-electrochemistry" relationship. This work promises disruptive changes to the synthesis, optimization, and commercialization of HC anodes for high-energy-density sodium-ion batteries
Beschreibung:	Date Revised 01.11.2024 published: Print-Electronic Citation Status PubMed-not-MEDLINE
ISSN:	1521-4095
DOI:	10.1002/adma.202407369