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.

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>

High fluoride-ion conductivity and fluoride-ion conductor−insulator transition in fluorinated hexagonal boron nitride

2021 ◽  
Vol 21 ◽  
pp. 100523
Author(s):  
Tsuyoshi Takami ◽  
Takashi Saito ◽  
Takashi Kamiyama ◽  
Katsumi Kawahara ◽  
Toshiharu Fukunaga ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Hexagonal Boron Nitride ◽  
Insulator Transition ◽  
Ion Conductivity ◽  
Fluoride Ion ◽  
Ion Conductor ◽  
High Fluoride

Tuning Sodium Ion Conductivity in the Layered Honeycomb Oxide Na3–xSn2–xSbxNaO6

2015 ◽  
Vol 54 (16) ◽  
pp. 7985-7991 ◽  
Author(s):  
Rebecca W. Smaha ◽  
John H. Roudebush ◽  
Jake T. Herb ◽  
Elizabeth M. Seibel ◽  
Jason W. Krizan ◽  
...  
Keyword(s):  
Ion Conductivity ◽  
Sodium Ion

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.

scholarly journals Sodium Ion Conductivity in the System Na1.5(A2-y, Bｙ), Si0.5P2.5O12 ; A, B ; Zr, Ti, Hf

1991 ◽  
Vol 59 (3) ◽  
pp. 254-256
Author(s):  
Katsunori KOMORI ◽  
Yoshifumi YAMAMOTO ◽  
Yuria SAITO ◽  
Osamu NAKAMURA
Keyword(s):  
Ion Conductivity ◽  
Sodium Ion

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
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