Composite NASICON (Na3Zr2Si2PO12) Solid-State Electrolyte with Enhanced Na+ Ionic Conductivity: Effect of Liquid Phase Sintering

2019 ◽  
Vol 11 (43) ◽  
pp. 40125-40133 ◽  
Author(s):  
Jin An Sam Oh ◽  
Linchun He ◽  
Anna Plewa ◽  
Masato Morita ◽  
Yue Zhao ◽  
...  
Keyword(s):  
Solid State ◽  
Liquid Phase ◽  
Ionic Conductivity ◽  
Liquid Phase Sintering ◽  
Solid State Electrolyte

scholarly journals Excess Li2O Additives to Promote Grain Boundary Growth and Improve Ionic Conductivity of LiTa2PO8 Solid Electrolytes

2021 ◽  
Vol 8 ◽  
Author(s):  
Qian Zhang ◽  
Fuhai Meng ◽  
Ruixiong Liao ◽  
Long Chen ◽  
Mengqian Xu ◽  
...  
Keyword(s):  
Solid State ◽  
Liquid Phase ◽  
Ionic Conductivity ◽  
Grain Boundary ◽  
Solid Phase ◽  
Synthesis Method ◽  
Lithium Ion ◽  
Liquid Phase Sintering ◽  
Diffusion Activation Energy ◽  
The Impact

LiTa2PO8 (LTPO) is a new solid-state lithium ion electrolyte material reported in the latest research, which has high bulk ionic conductivity and low grain boundary ion conductivity. However, it is difficult to density with conventional sintering methods. Herein, in this work, the solid-phase synthesis method was used to prepared the LTPO solid-state electrolyte, and the influence of the amount of lithium on the structure and performance of LTPO electrolyte material was investigated. The results show that the excess Li2O does not increase other impurities and does not change the structure of the material, but the liquid phase produced by the excess Li2O can promote the elimination of interfacial pores, accelerate the direct bonding of grains and improve the ionic conductivity of grain boundary, thus improving the overall ionic conductivity of the material. Considering the volatilization of lithium and the impact of liquid phase sintering at high temperatures and the content restructuring, after adding 20 wt% excess formulation of Li2O, the resultant of LTPO density is 5.0 g/cm3, the density reaches 85.58%. As a result, the total ionic conductivity of the electrolyte is 3.28 × 10–4 S/cm at 25°C, and the Li-ion diffusion activation energy is 0.27 eV. In addition, after loading this electrolyte into a Li–Li symmetric battery, it is proved that the electrolyte has lithium ion transport performance and can be used in all-solid-state batteries. However, it is also found from cyclic voltammetry (CV) and X-ray photoelectron spectroscopy (XPS) analysis that the interface between LTPO material and Li is unstable, and Ta5+ ions are reduced, which will be another key issue to be addressed in the future.

Enhanced ionic conductivity of Na3Zr2Si2PO12 solid electrolyte with Na2SiO3 by liquid phase sintering for Na+ solid-state batteries

Nanoscale ◽  
2021 ◽  
Author(s):  
Han Wang ◽  
Genfu Zhao ◽  
Shimin Wang ◽  
Dangling Liu ◽  
Zhi-Yuan Mei ◽  
...  
Keyword(s):  
Solid State ◽  
Liquid Phase ◽  
Ionic Conductivity ◽  
Solid Electrolyte ◽  
Solid Electrolytes ◽  
Liquid Phase Sintering ◽  
High Ionic Conductivity ◽  
Nasicon Type ◽  
Sodium Batteries ◽  
Solid State Batteries

NASICON-type Na3Zr2Si2PO12 (NZSP) is supposed to be one of the most potential solid electrolytes with the characteristics of high ionic conductivity and safety for solid-state sodium batteries. Many methods have...

scholarly journals The Influences of Sio2 on the Sintering Behavior and the Properties of Na+- Β/Β"-Al2O3 Solid Electrolyte

2019 ◽  
Vol 25 (3) ◽  
pp. 328-334
Author(s):  
Sung-Tae LEE ◽  
Dae-Han LEE ◽  
Sung-Ki LIM
Keyword(s):  
Solid State ◽  
Liquid Phase ◽  
Ionic Conductivity ◽  
Sintered Density ◽  
Phase Relationship ◽  
Liquid Phase Sintering ◽  
Sio2 Content ◽  
Sintering Behavior ◽  
Impedance Analyzer ◽  
The Relationship

SiO2-doped Na+-β/β″-Al2O3 was synthesized via a solid-state reaction, and the relationship between the SiO2 content and properties of Na+-β/β″-Al2O3 was investigated. Respective specimens were doped with 0 – 5 wt.% SiO2 as a liquid phase sintering promotor and sintered. The specimens were characterized by XRD, SEM, densimeter and impedance analyzer. In the sintered samples, the phase fraction of β″-Al2O3 decreased as the SiO2 content increased, whereas the relative sintered density was enhanced with the inclusion of less than 0.7 wt.% SiO2. The relative sintered density of Na+- β/β″-Al2O3 sintered specimen with 0.7 wt.% SiO2 doping reached 99.2 % of the theoretical density and the sintered density decreased when the amount of SiO2 was larger than 1 wt.% result from excessive liquid-phase formation during sintering. Similarly, the ionic conductivity of SiO2-doped Na+-β/β″-Al2O3 was enhanced by doping with a small amount of SiO2, whereas the addition of more than 1 wt.% SiO2 negatively affected the ionic conductivity of Na+-β/β″-Al2O3 due to a decrease in the sintered density and unfavorable phase relationship. DOI: http://dx.doi.org/10.5755/j01.ms.25.3.14246

scholarly journals Synthesis and Na+ Ion Conductivity of Stoichiometric Na3Zr2Si2PO12 by Liquid-Phase Sintering with NaPO3 Glass

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 3790
Author(s):  
Yongzheng Ji ◽  
Tsuyoshi Honma ◽  
Takayuki Komatsu
Keyword(s):  
Solid State ◽  
Liquid Phase ◽  
Sintering Temperature ◽  
Liquid Phase Sintering ◽  
Ion Conductivity ◽  
X Ray Diffraction ◽  
Conventional Solid State Reaction ◽  
X Ray ◽  
Sintering Time ◽  
Lower Activation

Sodium super ionic conductor (NASICON)-type Na3Zr2Si2PO12 (NZSP) with the advantages of the high ionic conductivity, stability and safety is one of the most famous solid-state electrolytes. NZSP, however, requires the high sintering temperature about 1200 °C and long sintering time in the conventional solid-state reaction (SSR) method. In this study, the liquid-phase sintering (LPS) method was applied to synthesize NZSP with the use of NaPO3 glass with a low glass transition temperature of 292 °C. The formation of NZSP was confirmed by X-ray diffraction analyses in the samples obtained by the LPS method for the mixture of Na2ZrSi2O7, ZrO2, and NaPO3 glass. The sample sintered at 1000 °C for 10 h exhibited a higher Na+ ion conductivity of 1.81 mS/cm at 100 °C and a lower activation energy of 0.18 eV compared with the samples prepared by the SSR method. It is proposed that a new LPE method is effective for the synthesis of NZSP and the NaPO3 glass has a great contribution to the Na+ diffusion at the grain boundaries.

In Situ Synthesis of a Li6.4La3Zr1.4Ta0.6O12/Poly(vinylene carbonate) Hybrid Solid-State Electrolyte with Enhanced Ionic Conductivity and Stability

2021 ◽  
Vol 4 (9) ◽  
pp. 9368-9375
Author(s):  
Xingyu Huang ◽  
Jinfeng Wu ◽  
Xuewei Wang ◽  
Yue Tian ◽  
Fei Zhang ◽  
...  
Keyword(s):  
Solid State ◽  
Ionic Conductivity ◽  
In Situ Synthesis ◽  
Vinylene Carbonate ◽  
Solid State Electrolyte

scholarly journals Production of ceramics from coal fly ash

2012 ◽  
Vol 18 (2) ◽  
pp. 245-254 ◽  
Author(s):  
Biljana Angjusheva ◽  
Emilija Fidancevska ◽  
Vojo Jovanov
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Solid State ◽  
Liquid Phase ◽  
Bending Strength ◽  
Coal Fly Ash ◽  
Liquid Phase Sintering ◽  
Heating Rates ◽  
Republic Of Macedonia ◽  
The Subject

Dense ceramics are produced from fly ash from REK Bitola, Republic of Macedonia. Four types of fly ash from electro filters and one from the collected zone with particles < 0.063 mm were the subject of this research. Consolidation was achieved by pressing (P= 133 MPa) and sintering (950, 1000, 1050 and 11000C and heating rates of 3 and 100/min). Densification was realized by liquid phase sintering and solid state reaction where diopside [Ca(Mg,Al)(Si,Al)2O6] was formed. Ceramics with optimal properties (porosity 2.96?0.5%, bending strength - 47.01?2 MPa, compressive strength - 170 ?5 MPa) was produced at 1100?C using the heating rate of 10?C/min.

Multi-variable Bayesian optimization for a new composition with high Na+ conductivity in the Na3PS4 family

2022 ◽  
Author(s):  
Jung Yong Seo ◽  
Sunggeun Shim ◽  
Jin-Woong Lee ◽  
Byung Do Lee ◽  
Sangwon Park ◽  
...  
Keyword(s):  
Solid State ◽  
Ionic Conductivity ◽  
Room Temperature ◽  
High Ionic Conductivity ◽  
Bayesian Optimization ◽  
Solid State Electrolyte ◽  
Aliovalent Substitution

Na3PS4 is an archetypal room-temperature (RT), Na+-conducting, solid-state electrolyte. Various compositional modifications of this compound via iso/aliovalent substitution are known to provide a high ionic conductivity (ion) that is comparable...

Atomistic insights into the screening and role of oxygen in enhancing the Li+ conductivity of Li7P3S11−xOx solid-state electrolytes

2019 ◽  
Vol 21 (48) ◽  
pp. 26358-26367
Author(s):  
Hanghui Liu ◽  
Zhenhua Yang ◽  
Qun Wang ◽  
Xianyou Wang ◽  
Xingqiang Shi
Keyword(s):  
Solid State ◽  
Ionic Conductivity ◽  
Electrochemical Stability ◽  
Oxygen Doping ◽  
Solid State Electrolyte ◽  
Solid State Electrolytes

A solid-state electrolyte (L7P3S10.25O0.75) with good ionic conductivity and electrochemical stability is successfully designed by oxygen doping.

Study on Preparation and Properties of Yttria Stabilized Zirconia Solid State Electrolyte

2013 ◽  
Vol 544 ◽  
pp. 64-67
Author(s):  
Wei Liu ◽  
Ge Ming Liu ◽  
Niu Sheng Peng ◽  
Da Zhi Sun
Keyword(s):  
Solid State ◽  
Ionic Conductivity ◽  
Impedance Spectroscopy ◽  
Yttria Stabilized Zirconia ◽  
Synthesis Methods ◽  
Stabilized Zirconia ◽  
Solid State Electrolyte ◽  
Spectroscopy Measurement ◽  
Basic Performance

Abstract. Currently, Yttria-stabilized zirconia solid state electrolyte are widely used in various fields . The basic performance of Yttria-stabilized zirconia (5YSZ) prepared by different synthesis methods and sintering temperatures are studied in this paper ,their phase compositions and microstructure are studied with XRD and SEM. The ionic conductivity of 5YSZ sintered at different temperature are studied with A.C. impedance spectroscopy measurement.

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