Dimensional Gradient Structure of CoSe₂@CNTs-MXene Anode Assisted by Ether for High-Capacity, Stable Sodium Storage.

ABSTRACT: Recently, abundant resources, low-cost sodium-ion batteries are deemed to the new-generation battery in the field of large-scale energy storage. Nevertheless, poor active reaction dynamics, dissolution of intermediates and electrolyte matching problems are significant challenges that need to be solved. Herein, dimensional gradient structure of sheet-tube-dots is constructed with CoSe₂@CNTs-MXene. Gradient structure is conducive to fast migration of electrons and ions with the association of ether electrolyte. For half-cell, CoSe₂@CNTs-MXene exhibits high initial coulomb efficiency (81.7%) and excellent cycling performance (400 mAh g^-1 cycling for 200 times in 2 A g^-1). Phase transformation pathway from crystalline CoSe₂-Na₂S

SUBMITTER: Xu E 

PROVIDER: S-EPMC8187670 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature