scholarly journals Na3–xEr1–xZrxCl6—A Halide-Based Fast Sodium-Ion Conductor with Vacancy-Driven Ionic Transport

2020 ◽  
Vol 3 (10) ◽  
pp. 10164-10173
Author(s):  
Roman Schlem ◽  
Ananya Banik ◽  
Mirco Eckardt ◽  
Mirijam Zobel ◽  
Wolfgang G. Zeier
Keyword(s):  
Ionic Transport ◽  
Sodium Ion ◽  
Ion Conductor

Under Pressure: Mechanochemical Effects on Structure and Ion Conduction in the Sodium-Ion Solid Electrolyte Na3PS4

2020 ◽  
Author(s):  
Theodosios Famprikis ◽  
O. Ulas Kudu ◽  
James Dawson ◽  
Pieremanuele Canepa ◽  
François Fauth ◽  
...  
Keyword(s):  
Ionic Conductivity ◽  
Mechanochemical Synthesis ◽  
Activation Volume ◽  
External Pressure ◽  
Sodium Ion ◽  
Variable Pressure ◽  
Ion Conductor ◽  
Ceramic Synthesis ◽  
Solid State Batteries ◽  
Fast Ion

<div> <p>Fast-ion conductors are critical to the development of solid-state batteries. The effects of mechanochemical synthesis that lead to increased ionic conductivity in an archetypical sodium-ion conductor Na<sub>3</sub>PS<sub>4</sub> are not fully understood. We present here a comprehensive analysis based on diffraction (Bragg, pair distribution function), spectroscopy (impedance, Raman, NMR, INS) and <i>ab-initio</i> simulations aimed at elucidating the synthesis-property relationships in Na<sub>3</sub>PS<sub>4</sub>. We consolidate previously reported interpretations about the local structure of ball-milled samples, underlining the sodium disorder and showing that a local tetragonal framework more accurately describes the structure than the originally proposed cubic one. Through variable-pressure impedance spectroscopy measurements, we report for the first time the activation volume for Na<sup>+</sup> migration in Na<sub>3</sub>PS<sub>4</sub>, which is ~30% higher for the ball-milled samples. Moreover, we show that the effect of ball-milling on increasing the ionic conductivity of Na<sub>3</sub>PS<sub>4</sub> to ~10<sup>-4</sup> S/cm can be reproduced by applying external pressure on a sample from conventional high temperature ceramic synthesis. We conclude that the key effects of mechanochemical synthesis on the properties of solid electrolytes can be analyzed and understood in terms of pressure, strain and activation volume.</p> </div>

Exploring the Influence of Substitution on the Structure and Transport Properties in the Sodium Superionic Conductor Na11+xSn2+x(Sb1−yPy)1−xS12

2020 ◽  
Author(s):  
Marvin Kraft ◽  
Lara Gronych ◽  
Theodosios Famprikis ◽  
Saneyuki Ohno ◽  
Wolfgang Zeier
Keyword(s):  
Electrochemical Impedance ◽  
Structural Phase ◽  
Ionic Transport ◽  
Sodium Ion ◽  
Ionic Conductors ◽  
Temperature Dependent ◽  
Activation Barriers ◽  
Rietveld Refinements ◽  
High Performing ◽  
The Given

<p>Sulfidic sodium ion conductors are currently investigated for the possible use in all-solid-state sodium ion batteries. The design of high performing electrolytes in terms of temperature-dependent ionic transport is based upon the fundamental understanding of structure – transport relationships within the given structural phase boundaries inherent to the investigated materials class. In this work, the Na<sup>+</sup> superionic structural family of Na<sub>11</sub>Sn<sub>2</sub>PS<sub>12</sub> is explored by using the systematic antimony substitution with phosphorous in Na<sub>11+<i>x</i></sub>Sn<sub>2+<i>x</i></sub>(Sb<sub>1-<i>y</i></sub>P<i><sub>y</sub></i>)<sub>1-<i>x</i></sub>S<sub>12</sub>. A combination of Rietveld refinements against X-ray synchrotron diffraction data with electrochemical impedance spectroscopy is used to monitor the changes in the anionic framework, the Na<sup>+</sup> substructure and the ionic transport. A new simplified descriptor for the average Na<sup>+</sup> diffusion pathways, the average Na<sup>+</sup> polyhedral volume is introduced, which is used to correlate the contraction of the overall lattice and the found activation barriers in the system. This study exemplifies how substitution affects diffusion pathways in ionic conductors and widens the knowledge about the related structural motifs and their influence on the ionic transport in this novel class of ionic conductors.</p>

scholarly journals A stable cathode-solid electrolyte composite for high-voltage, long-cycle-life solid-state sodium-ion batteries

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Erik A. Wu ◽  
Swastika Banerjee ◽  
Hanmei Tang ◽  
Peter M. Richardson ◽  
Jean-Marie Doux ◽  
...  
Keyword(s):  
Solid State ◽  
High Voltage ◽  
Coulombic Efficiency ◽  
Composite Cathode ◽  
Cycling Performance ◽  
Sodium Ion ◽  
Great Promise ◽  
Sodium Ion Batteries ◽  
Ion Conductor ◽  
Oxide Cathodes

AbstractRechargeable solid-state sodium-ion batteries (SSSBs) hold great promise for safer and more energy-dense energy storage. However, the poor electrochemical stability between current sulfide-based solid electrolytes and high-voltage oxide cathodes has limited their long-term cycling performance and practicality. Here, we report the discovery of the ion conductor Na3-xY1-xZrxCl6 (NYZC) that is both electrochemically stable (up to 3.8 V vs. Na/Na+) and chemically compatible with oxide cathodes. Its high ionic conductivity of 6.6 × 10−5 S cm−1 at ambient temperature, several orders of magnitude higher than oxide coatings, is attributed to abundant Na vacancies and cooperative MCl6 rotation, resulting in an extremely low interfacial impedance. A SSSB comprising a NaCrO2 + NYZC composite cathode, Na3PS4 electrolyte, and Na-Sn anode exhibits an exceptional first-cycle Coulombic efficiency of 97.1% at room temperature and can cycle over 1000 cycles with 89.3% capacity retention at 40 °C. These findings highlight the immense potential of halides for SSSB applications.

Sodium Ion Conductor Based Sensor Attached with NaNO2 for Amperometric Detection of  NO 2

1996 ◽  
Vol 143 (10) ◽  
pp. L241-L243 ◽  
Author(s):  
Norio Miura ◽  
Motoaki Iio ◽  
Geyu Lu ◽  
Noboru Yamazoe
Keyword(s):  
Amperometric Detection ◽  
Sodium Ion ◽  
Ion Conductor

New P2-Type Honeycomb-Layered Sodium-Ion Conductor: Na2Mg2TeO6

2018 ◽  
Vol 10 (18) ◽  
pp. 15760-15766 ◽  
Author(s):  
Yuyu Li ◽  
Zhi Deng ◽  
Jian Peng ◽  
Jintao Gu ◽  
Enyi Chen ◽  
...  
Keyword(s):  
Sodium Ion ◽  
Ion Conductor

scholarly journals Enhanced sodium ion conductivity in Na3VS4 by P-doping

RSC Advances ◽  
2019 ◽  
Vol 9 (67) ◽  
pp. 39180-39186
Author(s):  
Yu He ◽  
Fengqi Lu ◽  
Xiaojun Kuang
Keyword(s):  
Ion Conductivity ◽  
Sodium Ion ◽  
Ion Conductor

A new sodium ion conductor Na3VS4 was prepared and its conductivity improved by substitution of V with P.

Solid Electrolyte Carbon Dioxide Sensor Using Sodium-Ion Conductor and Li2CO3-BaCO3Electrode

1992 ◽  
Vol 31 (Part 2, No. 2B) ◽  
pp. L197-L199 ◽  
Author(s):  
Sheng Yao ◽  
Youichi Shimizu ◽  
Norio Miura ◽  
Noboru Yamazoe
Keyword(s):  
Carbon Dioxide ◽  
Solid Electrolyte ◽  
Sodium Ion ◽  
Ion Conductor ◽  
Carbon Dioxide Sensor
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