Effect of TeO2 sintering aid on the microstructure and electrical properties of Li1.3Al0.3Ti1.7(PO4)3 solid electrolyte

Zhao, Xiangchao; Luo, Yuansong; Zhao, Xin

doi:10.1016/j.jallcom.2022.167019

Cited by 19 publications

(5 citation statements)

References 43 publications

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“…The EIS plots are collected in Figure 3a, Figures S5 and S6. Typically, the impedance spectra of NZSP-xB 2 O 3 consist of a sloping line in a low-frequency region and a semicircle in a high-frequency range [29,30]. Furthermore, the room temperature ionic conductivity was calculated according to the resistance obtained from the impedance spectra and corresponding results are collected in Figure 3b ).…”

Section: Resultsmentioning

confidence: 99%

Engineered Grain Boundary Enables the Room Temperature Solid-State Sodium Metal Batteries

Sun

Jin

et al. 2023

Batteries

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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.

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Section: Resultsmentioning

confidence: 99%

Engineered Grain Boundary Enables the Room Temperature Solid-State Sodium Metal Batteries

Sun

Jin

et al. 2023

Batteries

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“…As observed, the EIS plot consists of a semicircle at high frequencies and a slope line at low frequencies. According to the equivalent circuit fitting results displayed in Figure S7, the diameter of the semicircle indicates the grain boundary resistance ( R gb ), and the intercept of the semicircle at low frequencies is the total resistance ( R t ). , Afterward, in accordance with the determined resistance, the total ionic conductivity was calculated, and all of which are summarized in Figure b. Overall, the ionic conductivity of NZSP- x NaBr is higher than that of NZSP and the conductivity of NZSP- x NaBr sintered at 1150 °C (NZSP- x NaBr-1150) is even much higher than that of the NZSP sintered at 1250 °C (9.3 × 10 –4 S cm –1 ), especially NZSP-7%NaBr-1150 (1.2 × 10 –3 S cm –1 ).…”

Section: Resultsmentioning

confidence: 99%

NaBr-Assisted Sintering of Na₃Zr₂Si₂PO₁₂ Ceramic Electrolyte Stabilizes a Rechargeable Solid-state Sodium Metal Battery

Li,

Sun,

Yuan

et al. 2023

ACS Appl. Mater. Interfaces

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Solid-state metal batteries with nonflammable solid-state electrolytes are regarded as the next generation of energy storage technology on account of their high safety and energy density. However, as for most solid electrolytes, low room temperature ionic conductivity and interfacial issues hinder their practical application. In this work, Na super ionic conductor (NASICON)-type Na3Zr2Si2PO12 (NZSP) electrolytes with improved ionic conductivity are synthesized by the NaBr-assisted sintering method. The effects of the NaBr sintering aid on the crystalline phase, microstructure, densification degree, and electrical performance as well as the electrochemical performances of the NZSP ceramic electrolyte are investigated in detail. Specifically, the NZSP-7%NaBr-1150 ceramic electrolyte has an ionic conductivity of 1.2 × 10–3 S cm–1 (at 25 °C) together with an activation energy of 0.28 eV. A low interfacial resistance of 35 Ω cm2 is achieved with the Na/NZSP-7%NaBr-1150 interface. Furthermore, the Na/NZSP-7%NaBr-1150/Na3V2(PO4)3 battery manifests excellent cycling stability with a capacity retention of 98% after 400 cycles at 1 C and 25 °C.

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“…The ionic conductivity of MAUST–LATP is 0.10 mS cm −1 , and the MAUST–LLZTO‐based lithium symmetric battery demonstrates good cycle stability over 5000 h at a current density of 0.1 mA cm −2 . The other scheme proposes that the addition of some sintering aids like Li 2 O, [ 67 ] Li 2 B 4 O 7 , [ 68 ] TeO 2 , [ 69 ] LiF, [ 70 ] and Li 2 WO 4 [ 71 ] can improve the ionic conductivity while reducing the sintering temperature. Usually, sintering aids reduce the activation energy of grain boundary lithium migration and increase the density of LATP [ 72 ] to boost electrical conductivity.…”

Section: Crystal Structure and Lithium‐ion Migration Channel And Key ...mentioning

confidence: 99%

Recent Advances of LATP and Their NASICON Structure as a Solid‐State Electrolyte for Lithium‐Ion Batteries

Yin,

Zhu,

et al. 2023

Adv Eng Mater

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The organic electrolyte in commercial liquid lithium‐ion batteries is volatile, prone to low‐temperature failure, has a declining safety performance at high temperatures, and is susceptible to serious side reactions with electrodes. The current research hotspots are solid‐state electrolytes with high energy densities and high safety performance. The next‐generation lithium metal solid‐state battery electrolyte is expected to be Li1+XAlXTi2‐X(PO4)3 (LATP) with a sodium superionic conductor (NASICON) structure due to its high ionic conductivity, high energy density, and good stability in air. This paper presents a review of the crystal structure of LATP, lithium‐ion diffusion channels, synthesis methods, factors affecting high ionic conductivity, and regulation and application of interfacial stability. This effectively addresses the problems of LATP in current applications and facilitates the promotion of all‐solid‐state batteries in future applications.This article is protected by copyright. All rights reserved.

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Effect of TeO2 sintering aid on the microstructure and electrical properties of Li1.3Al0.3Ti1.7(PO4)3 solid electrolyte

Cited by 19 publications

References 43 publications

Engineered Grain Boundary Enables the Room Temperature Solid-State Sodium Metal Batteries

Engineered Grain Boundary Enables the Room Temperature Solid-State Sodium Metal Batteries

NaBr-Assisted Sintering of Na₃Zr₂Si₂PO₁₂ Ceramic Electrolyte Stabilizes a Rechargeable Solid-state Sodium Metal Battery

Recent Advances of LATP and Their NASICON Structure as a Solid‐State Electrolyte for Lithium‐Ion Batteries

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Effect of TeO2 sintering aid on the microstructure and electrical properties of Li1.3Al0.3Ti1.7(PO4)3 solid electrolyte

Cited by 19 publications

References 43 publications

Engineered Grain Boundary Enables the Room Temperature Solid-State Sodium Metal Batteries

Engineered Grain Boundary Enables the Room Temperature Solid-State Sodium Metal Batteries

NaBr-Assisted Sintering of Na3Zr2Si2PO12 Ceramic Electrolyte Stabilizes a Rechargeable Solid-state Sodium Metal Battery

Recent Advances of LATP and Their NASICON Structure as a Solid‐State Electrolyte for Lithium‐Ion Batteries

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NaBr-Assisted Sintering of Na₃Zr₂Si₂PO₁₂ Ceramic Electrolyte Stabilizes a Rechargeable Solid-state Sodium Metal Battery