scholarly journals Sodium, Silver and Lithium-Ion Conducting β″-Alumina + YSZ Composites, Ionic Conductivity and Stability

Crystals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 293
Author(s):  
Liangzhu Zhu ◽  
Anil V. Virkar
Keyword(s):  
Ion Exchange ◽  
Electrochemical Impedance ◽  
Ionic Conductivities ◽  
Lithium Ion ◽  
Co2 Corrosion ◽  
Ionic Conductors ◽  
Ion Conductor ◽  
Sensor Applications ◽  
Potential Applications ◽  
Ion Conducting

Na-β″-alumina (Na2O.~6Al2O3) is known to be an excellent sodium ion conductor in battery and sensor applications. In this study we report fabrication of Na- β″-alumina + YSZ dual phase composite to mitigate moisture and CO2 corrosion that otherwise can lead to degradation in pure Na-β″-alumina conductor. Subsequently, we heat-treated the samples in molten AgNO3 and LiNO3 to respectively form Ag-β″-alumina + YSZ and Li-β″-alumina + YSZ to investigate their potential applications in silver- and lithium-ion solid state batteries. Ion exchange fronts were captured via SEM and EDS techniques. Their ionic conductivities were measured using electrochemical impedance spectroscopy. Both ion exchange rates and ionic conductivities of these composite ionic conductors were firstly reported here and measured as a function of ion exchange time and temperature.

scholarly journals Understanding fast-ion conduction in solid electrolytes

2021 ◽  
Vol 379 (2211) ◽  
Author(s):  
Benjamin J. Morgan
Keyword(s):  
Solid Electrolytes ◽  
Ionic Conductivities ◽  
Lithium Ion ◽  
Atomic Scale ◽  
Nmr Studies ◽  
Ion Conduction ◽  
Ion Conductor ◽  
Ion Conducting ◽  
Fast Ion ◽  
Ion Conductors

The ability of some solid materials to exhibit exceptionally high ionic conductivities has been known since the observations of Michael Faraday in the nineteenth century (Faraday M. 1838 Phil. Trans. R. Soc. 90 ), yet a detailed understanding of the atomic-scale physics that gives rise to this behaviour remains an open scientific question. This theme issue collects articles from researchers working on this question of understanding fast-ion conduction in solid electrolytes. The issue opens with two perspectives, both of which discuss concepts that have been proposed as schema for understanding fast-ion conduction. The first perspective presents an overview of a series of experimental NMR studies, and uses this to frame discussion of the roles of ion–ion interactions, crystallographic disorder, low-dimensionality of crystal structures, and fast interfacial diffusion in nanocomposite materials. The second perspective reviews computational studies of halides, oxides, sulfides and hydroborates, focussing on the concept of frustration and how this can manifest in different forms in various fast-ion conductors. The issue also includes five primary research articles, each of which presents a detailed analysis of the factors that affect microscopic ion-diffusion in specific fast-ion conducting solid electrolytes, including oxide-ion conductors Gd 2 Zr 2 O 7 and Bi 4 V 2 O 11 , lithium-ion conductors Li 6 PS 5 Br and Li 3 OCl , and the prototypical fluoride-ion conductor β - PbF 2 . This article is part of the Theo Murphy meeting issue ‘Understanding fast-ion conduction in solid electrolytes’.

On the Properties of an Ion Conductive System Incorporated in Hybrid Films

2000 ◽  
Vol 628 ◽  
Author(s):  
G. González ◽  
P. J. Retuert ◽  
S. Fuentes
Keyword(s):  
Electrochemical Impedance ◽  
Ternary Phase Diagram ◽  
Lithium Perchlorate ◽  
Molar Ratio ◽  
Ionic Conductors ◽  
X Ray Diffraction ◽  
Poly Ethylene Oxide ◽  
Ion Conducting ◽  
Poly Ethylene ◽  
High Degree

ABSTRACTBlending the biopolymer chitosan (CHI) with poly (aminopropilsiloxane) oligomers (pAPS), and poly (ethylene oxide) (PEO) in the presence of lithium perchlorate lead to ion conducting products whose conductivity depends on the composition of the mixture. A ternary phase diagram for mixtures containing 0.2 M LiClO4 shows a zone in which the physical properties of the products - transparent, flexible, mechanically robust films - indicate a high degree of molecular compatibilization of the components. Comparison of these films with binary CHI-pAPS nanocomposites as well as the microscopic aspect, thermal behavior, and X-ray diffraction pattern of the product with the composition PEO/CHI/pAPS/LiClO4 1:0.5:0.6:0.2 molar ratio indicates that these films may be described as a layered nanocomposite. In this composite, lithium species coordinated by PEO and pAPS should be inserted into chitosan layers. Electrochemical impedance spectroscopy measurements indicate the films are pure ionic conductors with a maximal bulk conductivity of 1.7*10-5 Scm-1 at 40 °C and a sample-electrode interface capacitance of about 1.2*10-9 F.

scholarly journals PEO Infiltration of Porous Garnet-Type Lithium-Conducting Solid Electrolyte Thin Films

Ceramics ◽  
2021 ◽  
Vol 4 (3) ◽  
pp. 421-436
Author(s):  
Aamir Iqbal Waidha ◽  
Vanita Vanita ◽  
Oliver Clemens
Keyword(s):  
Thin Films ◽  
Solid State ◽  
Ionic Conductivity ◽  
Electrochemical Impedance ◽  
Three Dimensional ◽  
Lithium Ion ◽  
Interfacial Resistance ◽  
Composite Electrolytes ◽  
Ion Conducting ◽  
Polymer Infiltration

Composite electrolytes containing lithium ion conducting polymer matrix and ceramic filler are promising solid-state electrolytes for all solid-state lithium ion batteries due to their wide electrochemical stability window, high lithium ion conductivity and low electrode/electrolyte interfacial resistance. In this study, we report on the polymer infiltration of porous thin films of aluminum-doped cubic garnet fabricated via a combination of nebulized spray pyrolysis and spin coating with subsequent post annealing at 1173 K. This method offers a simple and easy route for the fabrication of a three-dimensional porous garnet network with a thickness in the range of 50 to 100 µm, which could be used as the ceramic backbone providing a continuous pathway for lithium ion transport in composite electrolytes. The porous microstructure of the fabricated thin films is confirmed via scanning electron microscopy. Ionic conductivity of the pristine films is determined via electrochemical impedance spectroscopy. We show that annealing times have a significant impact on the ionic conductivity of the films. The subsequent polymer infiltration of the porous garnet films shows a maximum ionic conductivity of 5.3 × 10−7 S cm−1 at 298 K, which is six orders of magnitude higher than the pristine porous garnet film.

scholarly journals The Ion Exchange Behavior of Na/Li for the Lithium Ion Conductor Li1.3Ti1.7Al0.3(PO4)3;

2005 ◽  
Vol 21 (07) ◽  
pp. 782-785
Author(s):  
LOU Tai-ping ◽  
◽  
LI Da-gang ◽  
DAI Hou-chen ◽  
TANG Shu-huan ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Lithium Ion ◽  
Ion Conductor

LiTa2PO8: a fast lithium-ion conductor with new framework structure

2018 ◽  
Vol 6 (45) ◽  
pp. 22478-22482 ◽  
Author(s):  
Jaegyeom Kim ◽  
Juhyun Kim ◽  
Maxim Avdeev ◽  
Hoseop Yun ◽  
Seung-Joo Kim
Keyword(s):  
Three Dimensional ◽  
Lithium Ion ◽  
Framework Structure ◽  
Ion Conductor ◽  
Li Ion ◽  
Ion Conducting ◽  
New Framework

A new Li-ion conducting oxide, LiTa2PO8 with a novel three-dimensional framework structure was synthesized and characterized.

A comparative study of Li10.35Ge1.35P1.65S12 and Li10.5Ge1.5P1.5S12 superionic conductors

2020 ◽  
Vol 13 (06) ◽  
pp. 2050031
Author(s):  
Yue Jiang ◽  
Zhiwei Hu ◽  
Ming’en Ling ◽  
Xiaohong Zhu
Keyword(s):  
Ionic Conductivity ◽  
Room Temperature ◽  
Ionic Conductivities ◽  
Lithium Ion ◽  
Lattice Parameter ◽  
Superionic Conductors ◽  
Chemical Compositions ◽  
Temperature Conductivity ◽  
Room Temperature Conductivity ◽  
Ion Conductor

Since the lithium-ion conductor Li[Formula: see text]GeP2S[Formula: see text] (LGPS) with a super high room-temperature conductivity of 12[Formula: see text]mS/cm was first reported in 2011, sulfide-type solid electrolytes have been paid much attention. It was suggested by Kwon et al. [J. Mater. Chem. A 3, 438 (2015)] that some excess lithium ions in LGPS, namely, Li[Formula: see text]Ge[Formula: see text] P[Formula: see text]S[Formula: see text], could further improve their ionic conductivities, and the highest conductivity of 14.2[Formula: see text]mS/cm was obtained at [Formula: see text] though a larger lattice parameter that occurred at [Formula: see text]. In this study, we focus on these two different chemical compositions of LGPS with [Formula: see text] and [Formula: see text], respectively. Both samples were prepared using the same experimental process. Their lattice parameter, microstructure and room-temperature ionic conductivity were compared in detail. The results show that the main phase is the tetragonal LGPS phase but with a nearly identical amount of orthorhombic LGPS phase coexisting in both samples. Bigger lattice parameters, larger grain sizes and higher ionic conductivities are simultaneously achieved in Li[Formula: see text]Ge[Formula: see text]P[Formula: see text]S[Formula: see text] ([Formula: see text]), exhibiting an ultrahigh room-temperature ionic conductivity of 18.8[Formula: see text]mS/cm.

(Rare Earth/Li) Titanates and Niobates as Ionic Conductors

2000 ◽  
Vol 658 ◽  
Author(s):  
A. Morata-Orrantia ◽  
S. García-Martín ◽  
E. Morán ◽  
U. Amador ◽  
M. A. Alario-Franco
Keyword(s):  
Rare Earth ◽  
Ionic Conductivity ◽  
Lithium Ion ◽  
Related Structure ◽  
Ionic Conductors ◽  
X Ray Diffraction ◽  
X Ray ◽  
Properties Of Materials ◽  
Ion Conducting ◽  
Diffraction Patterns

ABSTRACTThe lithium ion conducting properties of materials of composition La0.58Li0.26TiO3, Nd0.58Li0.26TiO3, La0.67Li0.25Ti0.75Al0.25O3 and La0.29Li0.12NbO3 have been compared in relation with their microstructure. All the oxides have powder X-ray diffraction patterns characteristic of a perovskite-related structure with lattice parameters a∼√2ap, b∼√2ap, c∼2ap (p refers to cubic perovskite). However, some important differences are observed in their microstructure by SAED and HRTEM. Ordering between vacancies, Li+ and La3+ or Nd3+ and twinning of the NbO6 or TiO6 octahedra tilting system are shown in La0.29Li0.12NbO3 and Nd0.58Li0.26TiO3, which are the materials having a lower ionic conductivity. The La0.58Li0.26TiO3 and La0.67Li0.25Ti0.75Al0.25O3 oxides do not show ordering between cations.

Single-ion conducting gel polymer electrolytes: design, preparation and application

2020 ◽  
Vol 8 (4) ◽  
pp. 1557-1577 ◽  
Author(s):  
Kuirong Deng ◽  
Qingguang Zeng ◽  
Da Wang ◽  
Zheng Liu ◽  
Zhenping Qiu ◽  
...  
Keyword(s):  
Polymer Electrolytes ◽  
Ionic Conductivities ◽  
Lithium Ion ◽  
Transference Numbers ◽  
Gel Polymer Electrolytes ◽  
Ion Conducting

Single-ion conducting gel polymer electrolytes possess both unity lithium ion transference numbers (∼0.98) and high ionic conductivities (∼5.8 mS cm−1).

scholarly journals Flexible, solid-state, ion-conducting membrane with 3D garnet nanofiber networks for lithium batteries

2016 ◽  
Vol 113 (26) ◽  
pp. 7094-7099 ◽  
Author(s):  
Kun (Kelvin) Fu ◽  
Yunhui Gong ◽  
Jiaqi Dai ◽  
Amy Gong ◽  
Xiaogang Han ◽  
...  
Keyword(s):  
Solid State ◽  
Current Density ◽  
Room Temperature ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Hydrogen Electrode ◽  
Ion Conductor ◽  
Structural Reinforcement ◽  
Ion Conducting ◽  
A Current

Beyond state-of-the-art lithium-ion battery (LIB) technology with metallic lithium anodes to replace conventional ion intercalation anode materials is highly desirable because of lithium’s highest specific capacity (3,860 mA/g) and lowest negative electrochemical potential (∼3.040 V vs. the standard hydrogen electrode). In this work, we report for the first time, to our knowledge, a 3D lithium-ion–conducting ceramic network based on garnet-type Li6.4La3Zr2Al0.2O12 (LLZO) lithium-ion conductor to provide continuous Li+ transfer channels in a polyethylene oxide (PEO)-based composite. This composite structure further provides structural reinforcement to enhance the mechanical properties of the polymer matrix. The flexible solid-state electrolyte composite membrane exhibited an ionic conductivity of 2.5 × 10−4 S/cm at room temperature. The membrane can effectively block dendrites in a symmetric Li | electrolyte | Li cell during repeated lithium stripping/plating at room temperature, with a current density of 0.2 mA/cm2 for around 500 h and a current density of 0.5 mA/cm2 for over 300 h. These results provide an all solid ion-conducting membrane that can be applied to flexible LIBs and other electrochemical energy storage systems, such as lithium–sulfur batteries.

Ion Exchange Behavior of Na/Li for the Lithium Ion Conductor of LiTi2(PO4)3

2007 ◽  
Vol 23 (10) ◽  
pp. 1642-1646
Author(s):  
LOU Tai-Ping ◽  
◽  
◽  
WANG Jia-Liang
Keyword(s):  
Ion Exchange ◽  
Lithium Ion ◽  
Ion Conductor
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