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High-Performance NaVO3 with Mixed Cationic and Anionic Redox Reactions for Na-Ion Battery Applications
Su, BZ; Wu, SL; Liang, HQ; Zhou, WC; Liu, JN; Goonetilleke, D; Sharma, N; Sit, PHL; Zhang, WJ; Yu, DYW
2020-10-27
Source PublicationCHEMISTRY OF MATERIALS
ISSN0897-4756
Issue20Pages:8836
SubtypeArticle
AbstractSodium-ion batteries (NIBs) are a potential lowcost alternative to lithium-ion batteries for large-scale energy storage, but many high-capacity NIB cathode materials undergo irreversible structural changes during charge and discharge, leading to fast capacity fading. Herein, monoclinic NaVO3 exhibits good cycle performance with high capacity as a cathode material for NIBs. In situ synchrotron X-ray diffraction studies show that the material structure is virtually invariant during Na+ ( de)intercalation, with the a and b lattice parameters changing only by 0.13 and 0.19%, respectively. The material undergoes an oxygen redox reaction during initial charge while delivering a remarkable specific capacity of 245 mAh g-1 (1.2-4.7 V) with contributions from cationic (V4+/V5+) and anionic (O2-/O-) redox couples during discharge. The stable VO4 tetrahedral framework also enables the material to give superior rate and cycle capabilities, with a capacity of 164 mAh g(-1) (67% utilization) at a current of 1000 mA g(-1) (about 5C) and a capacity retention of 90% after 50 cycles. Density functional theory calculations further verify the stability of the material and the charge-discharge mechanism. This work can broaden the horizon for designing high-energy cathode materials with enhanced structural stability for sodium-ion batteries.
DOI10.1021/acs.chemmater.0c02244
WOS KeywordOXYGEN-REDOX ; CATHODE MATERIAL ; ELECTROCHEMICAL PERFORMANCE ; STRUCTURAL EVOLUTION ; HIGH-CAPACITY ; SODIUM ; P2-TYPE ; OXIDATION ; NACRO2
Language英语
WOS Research AreaChemistry ; Materials Science
PublisherAMER CHEMICAL SOC
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/27664
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Su, BZ,Wu, SL,Liang, HQ,et al. High-Performance NaVO3 with Mixed Cationic and Anionic Redox Reactions for Na-Ion Battery Applications[J]. CHEMISTRY OF MATERIALS,2020(20):8836.
APA Su, BZ.,Wu, SL.,Liang, HQ.,Zhou, WC.,Liu, JN.,...&Yu, DYW.(2020).High-Performance NaVO3 with Mixed Cationic and Anionic Redox Reactions for Na-Ion Battery Applications.CHEMISTRY OF MATERIALS(20),8836.
MLA Su, BZ,et al."High-Performance NaVO3 with Mixed Cationic and Anionic Redox Reactions for Na-Ion Battery Applications".CHEMISTRY OF MATERIALS .20(2020):8836.
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