Mechanochemical synthesis and crystallization of Li&lt;sub&gt;3&lt;/sub&gt;BO&lt;sub&gt;3&lt;/sub&gt;&amp;ndash;Li&lt;sub&gt;2&lt;/sub&gt;CO&lt;sub&gt;3&lt;/sub&gt; glass electrolytes

Nagao, Kenji; Hayashi, Akitoshi; Tatsumisago, Masahiro

doi:10.2109/jcersj2.16114

Cited by 28 publications

(20 citation statements)

References 22 publications

(14 reference statements)

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“…More recently, Jung and co‐workers reported a Li 3− x B 1− x C x O 3 (LBCO) coating on LCO particles prepared in aqueous solution, where the process can convert the Li 2 CO 3 as a surface impurity of LCO into ionically conducting LBCO . Although pure‐phase Li 3 BO 3 has a low ionic conductivity in the range of 10 −9 S cm −1 at room temperature, the addition of isostructural Li 2 CO 3 can improve the ionic conductivity to 6 × 10 −7 S cm −1 at x = 0.8. Additionally, this coating can prevent the formation of interfacial phase, Co 3 S 4 , formed between LCO and sulfide SSE.…”

Section: Stabilities and Interfacesmentioning

confidence: 99%

Sulfide‐Based Solid‐State Electrolytes: Synthesis, Stability, and Potential for All‐Solid‐State Batteries

et al. 2019

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Due to their high ionic conductivity and adeciduate mechanical features for lamination, sulfide composites have received increasing attention as solid electrolyte in all-solid-state batteries. Their smaller electronegativity and binding energy to Li ions and bigger atomic radius provide high ionic conductivity and make them attractive for practical applications. In recent years, noticeable efforts have been made to develop high-performance sulfide solid-state electrolytes. However, sulfide solid-state electrolytes still face numerous challenges including: 1) the need for a higher stability voltage window, 2) a better electrode-electrolyte interface and air stability, and 3) a cost-effective approach for large-scale manufacturing. Herein, a comprehensive update on the properties (structural and chemical), synthesis of sulfide solid-state electrolytes, and the development of sulfide-based all-solid-state batteries is provided, including electrochemical and chemical stability, interface stabilization, and their applications in high performance and safe energy storage.

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Section: Stabilities and Interfacesmentioning

confidence: 99%

Sulfide‐Based Solid‐State Electrolytes: Synthesis, Stability, and Potential for All‐Solid‐State Batteries

et al. 2019

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“…11 The conductivity of Li3BO3 is also enhanced when adding Li2CO3. 12 In the case of a Li4SiO4-Li3PO4 system, when the ratio of Li4SiO4 to Li3PO4 is 1:3, a high Li-ion conductivity of 10 -3 S cm -1 has been recorded at 573 K. 10 A Li2CO3-Li3BO3-Li2SO4 ternary mixed system has also been reported as a promising system, although the combinatorial space experimentally explored had a limited area, and 10 -5 S cm -1 was recorded at room temperature. 13 The use of computer-aided material designs, without the need for experiments, has been flourishing because recent computational developments have made it possible to produce sufficient physical values through density functional theory (DFT) calculations.…”

Section: Introductionmentioning

confidence: 99%

Li-Ion Conductive Li3PO4-Li3BO3-Li2SO4 Mixture: Prevision through Density Functional Molecular Dynamics and Machine Learning

Sumita

Homma

Kaneta

et al. 2019

Bulletin of the Chemical Society of Japan

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The development of high Li-ion conductive solid electrolytes is crucial for the practical use of all solid-state Li-ion batteries. The mixing of hetero Li-ion conductive substances is a known method for enhancing the Li-ion conductivity more than in the original substances. In this study, using computer simulations, we proved that a ternary Li3PO4-Li3BO3-Li2SO4 system has the potential to demonstrate improved Li-ion conductivity based on the introduction of a quasi-Li/oxygen vacancy. The Li-ion conductivities of this ternary system were calculated using several model systems based on the density functional molecular dynamics under an isothermal-isobaric ensemble. However, an exploration using the density functional molecular dynamics cannot cover the entire combinatorial space owing to a lack of computational capability. To search through a vast combinatorial space, we conducted analyses using a machine learning technique. The analysis results clarify the relationship between Li-ion conductivity and phonon free energy, and allow the optimum composition ratio with the highest Li-ion conductivity to be predicted.

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“…We have reported the mechanochemical synthesis of sulfide and oxide glass electrolytes [2][3][4][5][6][7][8][9]. In particular, the Li3BO3-Li2SO4-Li2CO3 glass-ceramic electrolytes prepared by mechanical milling and consecutive heat treatment showed relatively high lithium ionic conductivity of 10 -6 -10 -5 S cm -1 at room temperature [6][7][8][9]. In addition, these oxide glass-ceramic electrolytes easily deform and large contact area with active materials can be achieved simply by pressing at room temperature.…”

Section: Introductionmentioning

confidence: 99%

Amorphous LiCoO2-based Positive Electrode Active Materials with Good Formability for All-Solid-State Rechargeable Batteries

et al. 2018

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Amorphous LiCoO2-based positive electrode materials are synthesized by a mechanical milling technique. As a lithium oxy-acid, Li2SO4, Li3PO4, Li3BO3, Li2CO3, and LiNO3 are selected and milled with LiCoO2. XRD patterns indicate that reaction between LiCoO2 and these lithium oxy-acids proceeds. Amorphization mainly occurs, and several broad peaks attributable to cubic LiCoO2 are observed in all the samples. These amorphous active materials show mixed conductivities of electron and lithium ion. All-solid-state cells using the prepared amorphous active materials and the Li2.9B0.9S0.1O3.1 glass-ceramic electrolyte are fabricated and their charge-discharge properties are examined. The cells with only the 80LiCoO2·20Li2SO4 (mol%) and the 80LiCoO2·20Li3PO4 active materials function as secondary batteries. This is because higher lithium ionic conductivities are obtained in the 80LiCoO2·20Li2SO4 and 80LiCoO2·20Li3PO4 active materials than in the others. The largest capacity is obtained in the cell with the 80LiCoO2·20Li2SO4 active material because of its good formability and high lithium ionic conductivity. In addition, the cell with the 80LiCoO2·20Li2SO4 positive electrode active material shows the better cycle and rate performance than that with the crystalline LiCoO2. It is noted that the amorphization with lithium oxy-acids is a promising technique for achieving a novel active material with better electrochemical performance.

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Mechanochemical synthesis and crystallization of Li<sub>3</sub>BO<sub>3</sub>–Li<sub>2</sub>CO<sub>3</sub> glass electrolytes

Cited by 28 publications

References 22 publications

Sulfide‐Based Solid‐State Electrolytes: Synthesis, Stability, and Potential for All‐Solid‐State Batteries

Sulfide‐Based Solid‐State Electrolytes: Synthesis, Stability, and Potential for All‐Solid‐State Batteries

Li-Ion Conductive Li3PO4-Li3BO3-Li2SO4 Mixture: Prevision through Density Functional Molecular Dynamics and Machine Learning

Amorphous LiCoO2-based Positive Electrode Active Materials with Good Formability for All-Solid-State Rechargeable Batteries

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