钠离子电池硬碳阳极的合成策略

Jian Yin , Ye Shui Zhang , Hanfeng Liang , Wenli Zhang , Yunpei Zhu
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引用次数: 0

摘要

钠离子电池(SIB)具有丰富的钠源、相对较高的能量密度和潜在的低成本,是大规模储能的理想选择。硬质碳作为最有前途的阳极之一,可在低电位时提供较高的高原容量,从而提高钠离子电池的能量密度。钠离子的缺陷吸附证明了它们的斜坡容量,而高原容量则在很大程度上取决于插层和孔隙填充。然而,硬碳中储存钠离子的具体结构,即吸附、插层和孔隙填充机制的活性位点,尚未得到阐明。因此,需要精细的合成方法来制备具有可控特定结构的硬质碳,同时阐明提高钠离子存储性能的精确活性位点。为了给未来的设计提供数据库,我们总结了构建高原容量活性位点的硬碳阳极合成策略。我们强调了合成方法对硬碳精细结构和瑙离子存储行为的相应影响。最后,我们从研究和实际应用的角度提出了开发硬碳阳极的前景。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Synthesis strategies of hard carbon anodes for sodium-ion batteries

Synthesis strategies of hard carbon anodes for sodium-ion batteries

Sodium-ion battery (SIB) is an ideal candidate for large-scale energy storage due to high abundant sodium sources, relatively high energy density, and potentially low costs. Hard carbons, as one of the most promising anodes, could deliver high plateau capacities at low potentials, which boosts the energy densities of SIBs. Their slope capacities have been demonstrated from the defect adsorption of sodium ions, while the plateau capacity depends highly on intercalation and pore filling. Nevertheless, the specific structures of sodium ions stored in hard carbons have not been clarified, namely active sites of adsorption, intercalation, and pore-filling mechanisms. Therefore, delicate synthesis methods are required to prepare hard carbons with controllable specific structures, along with elucidating the precise active sites for enhancing the Na-ion storage performance. To offer databases for future designs, we summarized the synthesis strategies of hard carbon anodes for constructing active sites of plateau capacities. Synthesis methods were highlighted with corresponding influences on the meticulous structures of hard carbons and Na-ion storage behaviors. Last but not least, perspectives were proposed for developing hard carbon anodes from the points of research and practical applications.

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材料导报:能源(英文)
材料导报:能源(英文) Renewable Energy, Sustainability and the Environment, Nanotechnology
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