Effect of simultaneous addition of aluminum and chromium on the lithium ionic conductivity of LiGe2(PO4)3 NASICON-type glass–ceramics

Illbeigi, Mohammad; Fazlali, Alireza; Kazazi, Mahdi; Mohammadi, Amir H.

doi:10.1016/j.ssi.2016.03.012

Cited by 61 publications

(33 citation statements)

References 41 publications

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“…Most of the samples had total conductivities of 10 −4 to 10 −6 S/cm at near-room temperatures (24–30°C), but five samples had total conductivities above 10 −4 S/cm (aggregated at the right side of Figure 5(a )). Comparing the MDS plots colored by atomic composition and structure type in Figure 5(b) and (c) , respectively, these five highly ionic conductive samples [ 11 , 34 , 35 ] are of the NASICON structure type, which comprise covalent networks of corners sharing octahedra and PO 4 tetrahedra providing interstitial sites for the hopping of Li ions. Their atomic compositions included Li/Al/Ti/P/O [ 34 ], Li/Al/Ti/Si/P/O [ 35 ], Li/Al/Ge/P/O [ 11 ] and Li/Cr/Ge/P/O [ 11 ].…”

Section: Resultsmentioning

confidence: 99%

“…The final 17 descriptors applied in the machine learning were categorized into material, experimental, chemical and structural properties (see Figure 1). The additives (0: absent; 1: present), content of additives (wt%), sintering temperature (°C), sintering time (h), pellet diameter (mm), method type, grain size (μm) and phase type were collected along with the ionic conductivities from various published papers [8,[10][11][12]14,15,[30][31][32][33][34][35][36][37][38][39][40][41][42]. The method types were ball mill/ solid-state (0), melt quench (1), liquid phase (2), and sol-gel techniques (3).…”

Section: Descriptormentioning

confidence: 99%

“…Hence, the desired grain boundary conductance of each cubic grain (h gb ) can be determined by the inverse grain size (D) obtained from the total grain boundary conductivity (σ tot gb Þ as shown in Equation (11). The desired σ b and h gb were resolved from the reported ionic conductivities (σ tot b , σ tot gb ) by Equations (10) and (11) for further model training and analysis.…”

Section: > < >mentioning

confidence: 99%

“…The observed bulk and grain boundary conductivities, which can be considered as σ tot b and σ tot gb , respectively, in Equations (10) and (11), were collected from experimental papers. After selecting the data containing structural and experimental properties such as grain size for deriving the h gb , 437 data points (bulk and grain boundaries) composed of 96 different samples at various temperatures are available for further analysis.…”

Section: Data Distributionmentioning

confidence: 99%

“…Lilley et al and Breuer et al reported that at temperatures well below room temperature (~173 K) the bulk conductivity contributions are easily separated from the grain boundary response [2,4]. As the bulk conductivities are usually more than one order of magnitude higher than the grain boundary conductivities [5][6][7][8][9][10][11][12], the grain boundary conductivities are the limiting factor of ionic transport. However, the dominant factors of the individual bulk and grain boundary conductivities have not been comprehensively elucidated.…”

Section: Introductionmentioning

confidence: 99%

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Essential structural and experimental descriptors for bulk and grain boundary conductivities of Li solid electrolytes

Tanaka

Komori

et al. 2020

Science and Technology of Advanced Materials

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We present a computational approach for identifying the important descriptors of the ionic conductivities of lithium solid electrolytes. Our approach discriminates the factors of both bulk and grain boundary conductivities, which have been rarely reported. The effects of the interrelated structural (e.g. grain size, phase), material (e.g. Li ratio), chemical (e.g. electronegativity, polarizability) and experimental (e.g. sintering temperature, synthesis method) properties on the bulk and grain boundary conductivities are investigated via machine learning. The data are trained using the bulk and grain boundary conductivities of Li solid conductors at room temperature. The important descriptors are elucidated by their feature importance and predictive performances, as determined by a nonlinear XGBoost algorithm: (i) the experimental descriptors of sintering conditions are significant for both bulk and grain boundary, (ii) the material descriptors of Li site occupancy and Li ratio are the prior descriptors for bulk, (iii) the density and unit cell volume are the prior structural descriptors while the polarizability and electronegativity are the prior chemical descriptors for grain boundary, (iv) the grain size provides physical insights such as the thermodynamic condition and should be considered for determining grain boundary conductance in solid polycrystalline ionic conductors.

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Section: Resultsmentioning

confidence: 99%

Section: Descriptormentioning

confidence: 99%

Section: > < >mentioning

confidence: 99%

Section: Data Distributionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Essential structural and experimental descriptors for bulk and grain boundary conductivities of Li solid electrolytes

Tanaka

Komori

et al. 2020

Science and Technology of Advanced Materials

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Solid‐State Batteries with Inorganic Electrolytes

Suzuki

Watanabe

Fujiki

et al. 2020

Encyclopedia of Electrochemistry

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Demand for better energy storage continues to increase because of the new and improved technologies in electric vehicles (EVs), Internet of Things (IoT), and various forms of portable electronics. All‐solid‐state batteries (ASSBs) are deemed a promising power source for some of the applications because of their unique characteristics. In this article, the background and the current state of the field are first discussed. Different types of ASSBs (thin‐film, microbattery, and bulk‐type) are described, and their characteristics and applications are highlighted with particular emphasis on the differences from conventional liquid electrolyte batteries. After a brief summary of the history and application of all‐solid‐state primary batteries, all‐solid‐state secondary batteries of various types are described. Then, an overview of the thin‐film and micro‐size rechargeable batteries is given. A large portion of this article is dedicated to the large‐size secondary batteries due to their high energy density and high capacity, with particular emphasis on sulfide‐type ASSBs. The general procedure and challenges of the fabrication process of large‐format cells are also described for sulfide ASSBs. Finally, practical issues and common misconceptions regarding sulfide ASSBs are discussed, and the outlook of the field is discussed. This work will provide a review of this field from the industrial research and development (R&D) perspective and help bridge the gap between the views of academia and industry.

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