BiSb@Bi2O3/SbOx encapsulated in porous carbon as anode materials for sodium/potassium-ion batteries with a high pseudocapacitive contribution

Zhiyuan Wang; Chanqin Duan; Dan Wang; Kangze Dong; Shaohua Luo; Yanguo Liu; Qing Wang; Yahui Zhang; Aimin Hao

doi:10.1016/j.jcis.2020.07.061

BiSb@Bi₂O₃/SbO_x encapsulated in porous carbon as anode materials for sodium/potassium-ion batteries with a high pseudocapacitive contribution

J Colloid Interface Sci. 2020 Nov 15:580:429-438. doi: 10.1016/j.jcis.2020.07.061. Epub 2020 Jul 15.

Authors

Zhiyuan Wang¹, Chanqin Duan², Dan Wang³, Kangze Dong², Shaohua Luo³, Yanguo Liu⁴, Qing Wang³, Yahui Zhang³, Aimin Hao³

Affiliations

¹ School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China; School of Resources and Materials, Northeastern University at Qinhuangdao, Qinhuangdao 066004, China; Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province, Qinhuangdao, China. Electronic address: zhiyuanwang@neuq.edu.cn.
² School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China.
³ School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China; School of Resources and Materials, Northeastern University at Qinhuangdao, Qinhuangdao 066004, China; Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province, Qinhuangdao, China.
⁴ School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China; School of Resources and Materials, Northeastern University at Qinhuangdao, Qinhuangdao 066004, China; Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province, Qinhuangdao, China. Electronic address: lyg@neuq.edu.cn.

PMID: 32711194
DOI: 10.1016/j.jcis.2020.07.061

Abstract

Sodium-ion batteries (SIBs) and potassium-ion batteries (PIBs) are emerging next-generation energy storage technology, and exploiting applicative electrode materials to accommodate the large-sized Na⁺ and K⁺ are urgently needed. Herein, an innovative composite of BiSb@Bi₂O₃/SbO_x nanoparticles encapsulated in porous carbon (BiSb@Bi₂O₃/SbO_x@C) is fabricated through a template-assisted in-situ pyrogenic decomposition and evaluated as anodes for SIBs and PIBs. The BiSb@Bi₂O₃/SbO_x@C delivers high specific capacity, superior rate capability (205 mA h g^-1 and 111 mA h g^-1 at 2 Ah g^-1) and good cycling stability (248 mA h g^-1 and 214 mA h g^-1 after 500 cycles at 1 A g^-1) in SIBs and PIBs. The excellent performance owes to the synergistic effect of Bi and Sb, the multilayer nanostructure design as well as the interconnected porous carbon network, which effectively promotes electron transport and ion diffusion, restricts volume change and enhances the electrode structure stability simultaneously. Furthermore, the capacitive behavior contributes much to the storage of sodium and potassium ions, which guarantees a superior rate capability. This research opens up new opportunities for exploring high-performance anodes for SIBs and PIBs.

Keywords: Anode; BiSb alloy; Porous carbon; Potassium-ion batteries; Sodium-ion batteries.