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Hierarchically porous hard carbon with graphite nanocrystals for high-rate sodium ion batteries with improved initial Coulombic efficiency
Li, T; Liu, ZQ; Gu, YJ; Tang, YF; Huang, FQ
2020-03-15
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
SubtypeArticle
AbstractPractical application of hard carbon materials in sodium-ion batteries is largely limited by their low initial Coulombic efficiency and poor rate performance. An efficient structure design with appropriate porous structure and optimized graphitic degree is highly desired to tackle these problems. Herein, we report a new design of hierarchically porous hard carbon with rich graphite nanocrystals (PHCG). The graphite nanocrystals enable a high-level ordered structure inside hard carbon, leading to an improved initial Coulombic efficiency. And hierarchically porous structure supplies more entrance for Na+ ion diffusion and decreases Na+ ions diffusion distance, leading to a great rate performance. Therefore, the obtained hard carbon as the free-standing anodes exhibit 312 mAh g(-1) with an improved initial Coulombic efficiency (77.4%) and excellent cycle performance at high rate (112 mAh g(-1) at 5 A g(-1) after 3000 cycles). (C) 2019 Elsevier B.V. All rights reserved.
DOI10.1016/j.jallcom.2019.152703
WOS KeywordHIGH-PERFORMANCE SODIUM ; ANODE MATERIAL ; HIGH-CAPACITY ; SUSTAINABLE ROUTE ; LONG-LIFE ; LOW-COST ; LITHIUM ; BIOMASS ; NANOSPHERES ; ELECTRODES
Language英语
WOS Research AreaChemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
PublisherELSEVIER SCIENCE SA
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Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/28229
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Li, T,Liu, ZQ,Gu, YJ,et al. Hierarchically porous hard carbon with graphite nanocrystals for high-rate sodium ion batteries with improved initial Coulombic efficiency[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2020.
APA Li, T,Liu, ZQ,Gu, YJ,Tang, YF,&Huang, FQ.(2020).Hierarchically porous hard carbon with graphite nanocrystals for high-rate sodium ion batteries with improved initial Coulombic efficiency.JOURNAL OF ALLOYS AND COMPOUNDS.
MLA Li, T,et al."Hierarchically porous hard carbon with graphite nanocrystals for high-rate sodium ion batteries with improved initial Coulombic efficiency".JOURNAL OF ALLOYS AND COMPOUNDS (2020).
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