气候变化领域集成服务门户(CCPortal): Ultrafast synthesis of hard carbon anodes for sodium-ion batteries

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DOI	10.1073/pnas.2111119118
	Ultrafast synthesis of hard carbon anodes for sodium-ion batteries
	Zhen Y.; Chen Y.; Li F.; Guo Z.; Hong Z.; Titirici M.-M.
发表日期	2021
ISSN	0027-8424
卷号	118 期号:42
英文摘要	Hard carbons (HCs) are a significantly promising anode material for alkali metal-ion batteries. However, long calcination time and much energy consumption are required for the traditional fabrication way, resulting in an obstacle for high-throughput synthesis and structure regulation of HCs. Herein, we report an emerging sintering method to rapidly fabricate HCs from different carbon precursors at an ultrafast heating rate (300 to 500 °C min-1) under one minute by a multifield-regulated spark plasma sintering (SPS) technology. HCs prepared via the SPS possess significantly fewer defects, lower porosity, and less oxygen content than those pyrolyzed in traditional sintering ways. The molecular dynamics simulations are employed to elucidate the mechanism of the remarkably accelerated pyrolysis from the quickly increased carbon sp2 content under the multifield effect. As a proof of concept, the SPS-derived HC exhibits an improved initial Coulombic efficiency (88.9%), a larger reversible capacity (299.4 mAh⋅g-1), and remarkably enhanced rate capacities (136.6 mAh⋅g-1 at 5 A⋅g-1) than anode materials derived from a traditional route for Na-ion batteries.
英文关键词	hard carbons; rapid synthesis; sodium-ion batteries; spark plasma sintering
语种	英语
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/238333
作者单位	Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials, College of Physics and Energy, Fujian Normal University, Fuzhou, Fujian 350117, China; Fujian Provincial Collaborative Innovation Center for Advanced High-Field Superconducting Materials and Engineering, Fuzhou, 350117, China; Department of Chemical Engineering, Imperial College London, London, SW7 2AZ, United Kingdom; Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials, College of Physics and Energy, Fujian Normal University, Fuzhou, Fujian 350117, China
推荐引用方式 GB/T 7714	Zhen Y.,Chen Y.,Li F.,et al. Ultrafast synthesis of hard carbon anodes for sodium-ion batteries[J],2021,118(42).
APA	Zhen Y.,Chen Y.,Li F.,Guo Z.,Hong Z.,&Titirici M.-M..(2021).Ultrafast synthesis of hard carbon anodes for sodium-ion batteries.Proceedings of the National Academy of Sciences of the United States of America,118(42).
MLA	Zhen Y.,et al."Ultrafast synthesis of hard carbon anodes for sodium-ion batteries".Proceedings of the National Academy of Sciences of the United States of America 118.42(2021).