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- W4367316100 abstract "The NASICON-type (Sodium Super Ionic Conductor) Na3Zr2Si2PO12 solid electrolyte is one of the most promising electrolytes for solid-state sodium metal batteries. When preparing Na3Zr2Si2PO12 ceramic using a traditional high-temperature solid-state reaction, the high-densification temperature would result in the volatilization of certain elements and the consequent generation of impurity phase, worsening the functional and mechanical performance of the NASICON electrolyte. We rationally introduced the sintering additive B2O3 to the NASICON matrix and systemically investigated the influence of B2O3 on the crystal structure, microstructure, electrical performance, and electrochemical performance of the NASICON electrolytes. The results reveal that B2O3 can effectively reduce the densification sintering temperature and promote the performance of the Na3Zr2Si2PO12 electrolyte. The Na3Zr2Si2PO12-2%B2O3-1150 ℃ achieves the highest ionic conductivity of 4.7 × 10−4 S cm−1 (at 25 °C) with an activation energy of 0.33 eV. Furthermore, the grain boundary phase formed during the sintering process could improve the mechanical behavior of the grain boundary and inhibit the propagation of metallic sodium dendrite within the NASICON electrolyte. The assembled Na/Na3Zr2Si2PO12-2%B2O3/Na3V1.5Cr0.5(PO4)3 cell reveals the initial discharge capacity of 98.5 mAh g−1 with an initial Coulombic efficiency of 84.14% and shows a capacity retention of 70.3% at 30 mA g−1 over 200 cycles." @default.
- W4367316100 created "2023-04-29" @default.
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- W4367316100 date "2023-04-27" @default.
- W4367316100 modified "2023-09-26" @default.
- W4367316100 title "Engineered Grain Boundary Enables the Room Temperature Solid-State Sodium Metal Batteries" @default.
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- W4367316100 doi "https://doi.org/10.3390/batteries9050252" @default.
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