Rationally Designed Three‐Layered TiO<sub>2</sub>@amorphous MoS<sub>3</sub>@Carbon Hierarchical Microspheres for Efficient Potassium Storage
Man Huang, Baojuan Xi, Liwei Mi, Zhengchunyu Zhang, Weihua Chen, Jinkui Feng, Shenglin Xiong
Abstract
Abstract Amorphous MoS 3 has been an attractive electrode material for sodium−ion batteries and lithium−sulfur batteries. However, the potassium storage capability of amorphous MoS 3 remains unreported. Herein, the construction of hybrid hierarchical microspheres composed of amorphous MoS 3 nanosheets dual‐confined with TiO 2 core, and nitrogen‐doped carbon shell layer (denoted as TiO 2 @A‐MoS 3 @NC) via a self‐templating method, combined with a low‐temperature sulfurization process as a new anode material for potassium−ion batteries (PIBs), is reported. Benefitting from the unique structural merits including unique 1D chain structure, disordered arrangement of atoms and a large number of defects of amorphous MoS 3 , more active heterointerfacial sites, effectively mitigated volume change, good electrical contact, and easy K + ion migration, the TiO 2 @A‐MoS 3 @NC microspheres exhibit excellent potassium‐storage performance with high specific capacity, superior rate capability, and cycling stability.