• Dimensional gradient structure of sheet–tube–dots was constructed with CoSe₂@CNTs–MXene for fast ion and electron transportation.

• Density functional theory study discloses the electrochemical difference of CoSe₂@CNTs–MXene in ether/ester electrolyte system.

• Phase transformation of CoSe₂@CNTs–MXene was analyzed by in situ XRD. The full cell based on CoSe₂@CNTs–MXene anode was also assembled.

中文翻译：

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乙醚辅助 CoSe 2 @CNTs–MXene 阳极的三维梯度结构用于高容量、稳定的钠存储

• _{用 CoSe 2} @CNTs-MXene构建片-管-点的维度梯度结构，用于快速离子和电子传输。

• 密度泛函理论研究揭示了 CoSe ₂ @CNTs-MXene 在醚/酯电解质体系中的电化学差异。

• 通过原位 XRD 分析CoSe ₂ @CNTs–MXene的相变。还组装了基于 CoSe _{2 @CNTs–MXene 阳极的全电池。}