Thermal-Induced Cathodic Interface Change on Na3PS4-Based All-Solid-State Sodium Batteries

• DOI: 10.1021/acs.iecr.4c00901
• Publication Date: 2024-04-20T13:21:30Z
• Authors: Lin Li; Yujie Xiao; Chen Liu; Qiyue Luo; Ziling Jiang; Chaochao Wei; Zhongkai Wu; Long Zhang; Liping Wang; Shijie Cheng; Chuang Yu
• Keywords: Interface (matter)

FeS2 conversion electrode materials demonstrate excellent (electro)chemical stability with sulfide electrolytes and can provide a high capacity at room temperature. However, the effect of operating temperature on their kinetics has not yet been reported. In this study, we incorporated ionic conductors Na3PS4 as additives in composite cathode separator layer. The exhibit conductivity good anode stability. increased accelerates Na+ ion diffusion rate both solid electrolyte mixture, resulting reduced resistance electrochemical performance for corresponding all-solid-state sodium battery. XPS results indicate that active material maintains its original activity over extended cycles varying temperatures. Moreover, undergoes slight decomposition when induced by conductive carbon temperature, phenomenon worsens increasing working Na2Sn/Na3PS4/FeS2 shows discharge capacities superior cyclability various It delivers 264.4 585.3 mA h g–1 30 60 °C, respectively, cycled 0.5 A retains 210.3 after 260 425.8 700 cycles. These guidance designing high-energy-density, batteries materials.