scholarly journals Improving the Ionic Conductivity of the LLZO–LZO Thin Film through Indium Doping

Crystals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 426
Author(s):  
Zongkai Yan ◽  
Yu Song ◽  
Shuai Wu ◽  
Yongmin Wu ◽  
Shipai Song ◽  
...  
Keyword(s):  
Thin Film ◽  
Solid State ◽  
Ionic Conductivity ◽  
Ionic Conductivities ◽  
Lithium Ion ◽  
Treatment Temperature ◽  
Cubic Phase ◽  
Good Thermal Stability ◽  
Indium Doping ◽  
Electrochemical Window

A solid-state electrolyte with an ionic conductivity comparable to that of a liquid electrolyte is demanded of all-solid-state lithium-ion batteries. Li7La3Zr2O12 (LLZO) is considered to be a promising candidate due to its good thermal stability, high ionic conductivity, and wide electrochemical window. However, the synthesis of a stable cubic-phase LLZO thin film with enhanced densification at a relatively low thermal treatment temperature is yet to be developed. Indium is predicted to be a possible dopant to stabilize the cubic-phase LLZO (c-LLZO). Herein, via a nanolayer stacking process, a LLZO–Li2CO3–In2O3 multilayer solid electrolyte precursor was obtained. After thermal annealing at different temperatures, the effects of indium doping on the formation of c-LLZO and the ionic conductivities of the prepared LLZO–LZO thin film were systematically investigated. The highest ionic conductivity of 9.6 × 10−6 S·cm–1 was obtained at an annealing temperature of 800 °C because the incorporation of indium promoted the formation of c-LLZO and the highly conductive LLZO–LZO interfaces. At the end, a model of LLZO–LZO interface-enhancing ionic conductivity was proposed. This work provides a new approach for the development of low-temperature LLZO-based, solid-state thin-film batteries.

scholarly journals Submicron-Sized Nb-Doped Lithium Garnet for High Ionic Conductivity Solid Electrolyte and Performance of Quasi-Solid-State Lithium Battery

Materials ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 560 ◽  
Author(s):  
Yan Ji ◽  
Cankai Zhou ◽  
Feng Lin ◽  
Bingjing Li ◽  
Feifan Yang ◽  
...  
Keyword(s):  
Activation Energy ◽  
Particle Size ◽  
Solid State ◽  
Ionic Conductivity ◽  
Relative Density ◽  
Electrochemical Impedance ◽  
Cubic Phase ◽  
Electrochemical Window ◽  
Long Time ◽  
Total Ionic Conductivity

The garnet Li7La3Zr2O12 (LLZO) has been widely investigated because of its high conductivity, wide electrochemical window, and chemical stability with regards to lithium metal. However, the usual preparation process of LLZO requires high-temperature sintering for a long time and a lot of mother powder to compensate for lithium evaporation. In this study submicron Li6.6La3Zr1.6Nb0.4O12 (LLZNO) powder―which has a stable cubic phase and high sintering activity―was prepared using the conventional solid-state reaction and the attrition milling process, and Li stoichiometric LLZNO ceramics were obtained by sintering this powder―which is difficult to control under high sintering temperatures and when sintered for a long time―at a relatively low temperature or for a short amount of time. The particle-size distribution, phase structure, microstructure, distribution of elements, total ionic conductivity, relative density, and activation energy of the submicron LLZNO powder and the LLZNO ceramics were tested and analyzed using laser diffraction particle-size analyzer (LD), X-Ray Diffraction (XRD), Scanning Electron Microscope (SEM), Electrochemical Impedance Spectroscopy (EIS), and the Archimedean method. The total ionic conductivity of samples sintered at 1200 °C for 30 min was 5.09 × 10−4 S·cm−1, the activation energy was 0.311 eV, and the relative density was 87.3%. When the samples were sintered at 1150 °C for 60 min the total ionic conductivity was 3.49 × 10−4 S·cm−1, the activation energy was 0.316 eV, and the relative density was 90.4%. At the same time, quasi-solid-state batteries were assembled with LiMn2O4 as the positive electrode and submicron LLZNO powder as the solid-state electrolyte. After 50 cycles, the discharge specific capacity was 105.5 mAh/g and the columbic efficiency was above 95%.

scholarly journals Submicron Sized Nb Doped Lithium Garnet for High Ionic Conductivity Solid Electrolyte and Performance of All Solid-State Lithium Battery

2019 ◽  
Author(s):  
Yan Ji ◽  
Cankai Zhou ◽  
Feng Lin ◽  
Bingjing Li ◽  
Feifan Yang ◽  
...  
Keyword(s):  
Activation Energy ◽  
Particle Size ◽  
Solid State ◽  
Ionic Conductivity ◽  
Relative Density ◽  
Specific Capacity ◽  
Cubic Phase ◽  
Conventional Solid State Reaction ◽  
Electrochemical Window ◽  
Total Ionic Conductivity

The garnet Li7La3Zr2O12 (LLZO) has been widely investigated because of its high conductivity, wide electrochemical window and chemical stability to lithium metal. However, the usual preparation process of LLZO requires a long time of high-temperature sintering and a lot of mother powders against the lithium evaporation. The submicron Li6.6La3Zr1.6Nb0.4O12 (LLZNO) powders are prepared by conventional solid-state reaction method and attrition milling process, which are stable cubic phase and have high sintering activity, and Li stoichiometric LLZNO ceramics are obtained by sintering at a relative lower temperature or for a short time by using these powders which are difficult to control under high sintering temperature and long sintering time. The particle size distribution, phase structure, microstructure, distribution of element, total ionic conductivity, relative density and activation energy of submicron LLZNO powders and LLZNO ceramics are tested and analyzed by laser diffraction particle size analyzer, XRD, SEM, EIS and Archimedean method. The total ionic conductivity of sample sintered at 1200 °C for 30 min is 5.09 × 10-4 S·cm-1, the activation energy is 0.311 eV, and the relative density is 87.3%, and sintered at 1150 °C for 60 min total ionic conductivity is 3.49 × 10-4 S·cm-1, the activation energy is 0.316 eV, and the relative density is 90.4%. At the same time, all-solid-state batteries are assembled with LiMn2O4 as positive electrode and submicron LLZNO powders as solid state electrolyte. After 50 cycles, the discharge specific capacity is 105.5 mAh/g and the columbic efficiency is above 95%.

A highly elastic and flexible solid-state polymer electrolyte based on ionic liquid-decorated PMMA nanoparticles for lithium batteries

2017 ◽  
Vol 41 (21) ◽  
pp. 13096-13103 ◽  
Author(s):  
Yang Li ◽  
Ka Wai Wong ◽  
Qianqian Dou ◽  
Wei Zhang ◽  
Lixiang Wang ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Solid State ◽  
Ionic Conductivity ◽  
Polymer Electrolyte ◽  
Lithium Batteries ◽  
Lithium Ion ◽  
Transference Number ◽  
Lithium Ion Transference Number ◽  
Electrochemical Window

The highly elastic and flexible solid-state polymer electrolyte exhibits enhanced ionic conductivity, an enhanced lithium ion transference number and a wide electrochemical window.

scholarly journals Ultrahigh ionic conductivity in optimally sintered Li10.35Ge1.35P1.65S12 superionic conductor

2020 ◽  
Author(s):  
Hao Wen ◽  
Yue Jiang ◽  
Xingang Liu ◽  
Xiaohong Zhu ◽  
Chuhong Zhang
Keyword(s):  
Solid State ◽  
Ionic Conductivity ◽  
Solid State Reaction ◽  
Ionic Conductivities ◽  
Lithium Ion ◽  
Superionic Conductor ◽  
Conventional Solid State Reaction ◽  
Temperature Conductivity ◽  
Room Temperature Conductivity ◽  
Order Of Magnitude

Abstract Lithium superionic conductor Li10+δGe1+δP2−δS12 has attracted tremendous interest for advanced all-solid-state lithium ion batteries due to extremely high ionic conductivity. However, the synthetic processes reported in literature are widely divergent, resulting in an order of magnitude difference in ionic conductivities of the same material, but as far as we know, the influence of synthetic conditions on ionic conductivity has not been studied yet. Herein, we systematically investigate the influence of sintering temperature on phase composition and ionic conductivity of the Li10+δGe1+δP2−δS12 compounds synthesized by conventional solid-state reaction for the first time. It is found that low and high sintering temperatures lead to a low crystallinity and the formation of impurity phases, respectively. As a result, the pure Li10.35Ge1.35P1.65S12, well crystallized in space group P42/nmc, is fabricated by optimization of the solid-state reaction temperature at 580 °C and its room temperature conductivity (19 mS cm− 1) is the highest among all existing Li10+δGe1+δP2−δS12 solid electrolytes. Meanwhile, the microstructure of Li10.35Ge1.35P1.65S12, being very dense and uniform, is demonstrated firstly by atomic force microscopy.

scholarly journals The synergistic effect of the PEO–PVA–PESf composite polymer electrolyte for all-solid-state lithium-ion batteries

RSC Advances ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 5462-5467 ◽  
Author(s):  
Ling Xu ◽  
Kaiyuan Wei ◽  
Yong Cao ◽  
Shiping Ma ◽  
Jian Li ◽  
...  
Keyword(s):  
Solid State ◽  
Ionic Conductivity ◽  
Synergistic Effect ◽  
Lithium Ion Batteries ◽  
Synergistic Effects ◽  
Lithium Ion ◽  
Composite Polymer Electrolyte ◽  
Cyclic Performance ◽  
Composite Polymer ◽  
Electrochemical Window

PVA and PESf have synergistic effects for CPE, resulting in a wider electrochemical window, higher ionic conductivity and better cyclic performance.

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.

Thin-Film Solid State Lithium-Ion Batteries of the LiCoC2/LiPON/Si@O@Al System

2021 ◽  
Vol 50 (5) ◽  
pp. 333-338
Author(s):  
A. S. Rudy ◽  
A. A. Mironenko ◽  
V. V. Naumov ◽  
I. S. Fedorov ◽  
A. M. Skundin ◽  
...  
Keyword(s):  
Thin Film ◽  
Solid State ◽  
Lithium Ion Batteries ◽  
Lithium Ion

PROPERTIES OF ALL-SOLID-STATE LITHIUM-ION RECHARGEABLE BATTERIES DEPOSITED BY RF MAGNETRON SPUTTERING

2013 ◽  
Vol 27 (22) ◽  
pp. 1350156 ◽  
Author(s):  
R. J. ZHU ◽  
Y. REN ◽  
L. Q. GENG ◽  
T. CHEN ◽  
L. X. LI ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Solid State ◽  
Magnetron Sputtering ◽  
Coulombic Efficiency ◽  
Electronic Conductivity ◽  
Lithium Ion ◽  
Rf Magnetron Sputtering ◽  
Rechargeable Batteries ◽  
Voltage Range

Amorphous V 2 O 5, LiPON and Li 2 Mn 2 O 4 thin films were fabricated by RF magnetron sputtering methods and the morphology of thin films were characterized by scanning electron microscopy. Then with these three materials deposited as the anode, solid electrolyte, cathode, and vanadium as current collector, a rocking-chair type of all-solid-state thin-film-type Lithium-ion rechargeable battery was prepared by using the same sputtering parameters on stainless steel substrates. Electrochemical studies show that the thin film battery has a good charge–discharge characteristic in the voltage range of 0.3–3.5 V, and after 30 cycles the cell performance turned to become stabilized with the charge capacity of 9 μAh/cm2, and capacity loss of single-cycle of about 0.2%. At the same time, due to electronic conductivity of the electrolyte film, self-discharge may exist, resulting in approximately 96.6% Coulombic efficiency.

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