微棒结构中的高容量双层 (NH4)0.5V2O5 储钠器

IF 3.9 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering B-advanced Functional Solid-state Materials Pub Date : 2024-11-02 DOI:10.1016/j.mseb.2024.117793

Thi Hong Loan Dang , Thi Thu Trang Nguyen , Hai Nam Pham , Hoang Anh Nguyen , Thi Thu Hong Nguyen , Minh Dai To , Thu Thao Nguyen , Thi Nam Pham , Dai Lam Tran , Wen Jen Lee , Minh Thuan Pham , Anh Tuan Dao , Quang Vinh Lam , Thai Hoang Nguyen , Viet Hai Le , Le Thanh Nguyen Huynh

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引用次数: 0

摘要

通过水热法合成了铵钒青铜 (NH4)0.5V2O5（NVO），并研究了作为镎离子电池阴极的镎离子插入/萃取过程。结构分析表明，微棒结构中的双层 NVO 由双层 [VO6]构成，层间距离为 9.717 Å，适合于可逆性储纳。充放电循环性能在 200 次长期循环中可达到 160 mAh/g，且结构稳定。在不同的Na含量状态下进行的原位EXD显示了Na迁移过程中夹层的收缩/膨胀，而NH4+离子作为双层V2O5的 "支柱 "在确保循环稳定性方面发挥了重要作用。这项研究成果为钠离子电池中的高容量 V2O5 多晶体家族做出了贡献。

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A high-capacity double-layered (NH4)0.5V2O5 in micro-rods structure for sodium storage

An ammonium vanadium bronze (NH₄)_0.5V₂O₅ (NVO) was synthesized via a hydrothermal route and investigated the Na-insertion/extraction process as a cathode for Na-ion batteries. The structural analysis confirms that the double-layered NVO in the micro-rods structure is formed by the double-sheet [VO₆] with a large distance interlayer of 9.717 Å to be suitable for reversible Na-storage. The charge–discharge cycling performance delivers ∼160 mAh/g for long-term 200 cycles with structural stability. The ex-situ EXD at various Na-content states demonstrates the shrinkage/expansion of the interlayers during Na-migration, and the NH₄⁺-ions play an essential role as the “pillar” of double-layered V₂O₅ to assure cycling stability. This work contributes to a high-capacity member of the V₂O₅ polymorph family in the context of Na-ion batteries.

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来源期刊

Materials Science and Engineering B-advanced Functional Solid-state Materials 工程技术-材料科学：综合

CiteScore

5.60

自引率

2.80%

发文量

481

审稿时长

3.5 months

期刊介绍： The journal provides an international medium for the publication of theoretical and experimental studies and reviews related to the electronic, electrochemical, ionic, magnetic, optical, and biosensing properties of solid state materials in bulk, thin film and particulate forms. Papers dealing with synthesis, processing, characterization, structure, physical properties and computational aspects of nano-crystalline, crystalline, amorphous and glassy forms of ceramics, semiconductors, layered insertion compounds, low-dimensional compounds and systems, fast-ion conductors, polymers and dielectrics are viewed as suitable for publication. Articles focused on nano-structured aspects of these advanced solid-state materials will also be considered suitable.