Affiliation:
1. School of Chemistry and Chemical Engineering Yangzhou University Yangzhou 225002 P. R. China
2. Institutes of Physical Science and Information Technology Anhui University Hefei 230601 P. R. China
3. Department of Chemistry University of Louisiana at Lafayette Lafayette LA 70504 USA
4. Graduate School of Convergence Science and Technology Seoul National University 145 Gwanggyo‐ro, Yeongtong‐gu Suwon‐si Gyeonggi‐do 16229 Republic of Korea
5. Advanced Institutes of Convergence Technology 145 Gwanggyo‐ro, Yeongtong‐gu Suwon‐si Gyeonggi‐do 16229 Republic of Korea
Abstract
AbstractThe advancement of Zn–Se batteries has been hindered by significant challenges, such as the sluggish kinetics of Se cathodes, limited Se loading, and uncontrollable formation of Zn dendrites. In this study, a bidirectional optimization strategy is devised for both cathode and anode to bolster the performance of Zn–Se batteries. A novel bowl‐in‐ball structured carbon (BIBCs) material is synthesized to serve as a nanoreactor, in which tin‐based materials are grown and derived in situ to construct cathodes and anodes. Within the cathode, the multifunctional host material (SnSe@BIBCs) exhibits large adsorption capacity for selenium, and demonstrates supreme catalytic properties and spatially confined characteristics toward the selenium reduction reaction (SeRR). On the anode, Sn@BIBCs displays triple‐induced properties, including the zincophilic of the internal metallic Sn, the homogenized spatial electric field from the 3D spatial structure, and the curvature effect of the bowl‐shaped carbon. Collectively, these factors induce preferential nucleation of Zn, ensuring its uniform deposition. As a result, the integrated Zn–Se battery system achieves a remarkable specific capacity of up to 603 mAh g−1 and an impressive energy density of 581 W kg−1, highlighting its tremendous potential for practical applications.
Funder
National Natural Science Foundation of China