scholarly journals All-Solid-State Lithium-Ion Batteries with Oxide/Sulfide Composite Electrolytes

Materials ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 1998
Author(s):  
Young Seon Park ◽  
Jae Min Lee ◽  
Eun Jeong Yi ◽  
Ji-Woong Moon ◽  
Haejin Hwang
Keyword(s):  
Solid State ◽  
Ionic Conductivity ◽  
Room Temperature ◽  
Lithium Ion ◽  
Composite Electrolytes ◽  
Composite Electrolyte ◽  
Interfacial Contact ◽  
Lithium Ion Conductivity ◽  
Charge Discharge ◽  
Discharge Curves

Li6.3La3Zr1.65W0.35O12 (LLZO)-Li6PS5Cl (LPSC) composite electrolytes and all-solid-state cells containing LLZO-LPSC were fabricated by cold pressing at room temperature. The LPSC:LLZO ratio was varied, and the microstructure, ionic conductivity, and electrochemical performance of the corresponding composite electrolytes were investigated; the ionic conductivity of the composite electrolytes was three or four orders of magnitude higher than that of LLZO. The high conductivity of the composite electrolytes was attributed to the enhanced relative density and the rule of mixture for soft LPSC particles with high lithium-ion conductivity (~10−4 S·cm−1). The specific capacities of all-solid-state cells (ASSCs) consisting of a LiNi0.8Co0.1Mn0.1O2 (NCM811) cathode and the composite electrolytes of LLZO:LPSC = 7:3 and 6:4 were 163 and 167 mAh·g−1, respectively, at 0.1 C and room temperature. Moreover, the charge–discharge curves of the ASSCs with the composite electrolytes revealed that a good interfacial contact was successfully formed between the NCM811 cathode and the LLZO-LPSC composite electrolyte.

Characteristics of Polymer Composite Electrolyte for MEMS Power System

2005 ◽  
Vol 486-487 ◽  
pp. 566-569
Author(s):  
Jung Nam Kim ◽  
Jong Wan Park
Keyword(s):  
Ionic Conductivity ◽  
Power System ◽  
Polymer Electrolyte ◽  
Room Temperature ◽  
Surface Groups ◽  
Interfacial Stability ◽  
Composite Electrolytes ◽  
Composite Electrolyte ◽  
Charge Discharge ◽  
Discharge Test

In the polymer electrolyte, lots of salt have been studied and synthesized in many laboratories. In the previous our work[1,2], we found that the SiO2 (-7 nm, Degussa-Huls), which had the OH- and (CH3)3 surface groups, could help to enhance the ionic conductivity and the interfacial stability. We used as a plasticizer. It has the four CN groups at the end of chains. It was helpful to enhance the ionic conductivity, as respected. The ionic conductivity of the composite electrolytes was about 5.0ⅹ10-5 S/cm at room temperature. In addition, we conducted the charge/discharge test with LiMn2O4 at room temperature and 45 °C. The retention of 1st cycle to 100th cycle was 74 % at 45°C.

scholarly journals Room-Temperature Solid-State Lithium-Ion Battery Using a LiBH4–MgO Composite Electrolyte

2021 ◽  
Vol 4 (2) ◽  
pp. 1228-1236
Author(s):  
Valerio Gulino ◽  
Matteo Brighi ◽  
Fabrizio Murgia ◽  
Peter Ngene ◽  
Petra de Jongh ◽  
...  
Keyword(s):  
Solid State ◽  
Lithium Ion Battery ◽  
Room Temperature ◽  
Lithium Ion ◽  
Composite Electrolyte

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.

Elastomers uploaded electrospun nanofibrous membrane as solid state polymer electrolytes for lithium-ion batteries

RSC Advances ◽  
2015 ◽  
Vol 5 (101) ◽  
pp. 82960-82967
Author(s):  
Mingming Que ◽  
Yijing Wang ◽  
Yongfen Tong ◽  
Lie Chen ◽  
Junchao Wei ◽  
...  
Keyword(s):  
High Temperature ◽  
Solid State ◽  
Electrochemical Properties ◽  
Lithium Ion Batteries ◽  
Polymer Electrolytes ◽  
Lithium Ion ◽  
Nanofibrous Membrane ◽  
Composite Electrolytes ◽  
Electrospun Membranes ◽  
Charge Discharge

Good electrochemical properties and reversible charge/discharge solid state composite electrolytes were achieved at high temperature by uploading 3PEG onto electrospun membranes.

scholarly journals Crystal Structure and Preparation of Li7La3Zr2O12 (LLZO) Solid-State Electrolyte and Doping Impacts on the Conductivity: An Overview

Electrochem ◽  
2021 ◽  
Vol 2 (3) ◽  
pp. 390-414
Author(s):  
Md Mozammal Raju ◽  
Fadhilah Altayran ◽  
Michael Johnson ◽  
Danling Wang ◽  
Qifeng Zhang
Keyword(s):  
Crystal Structure ◽  
Activation Energy ◽  
Solid State ◽  
Ionic Conductivity ◽  
Solid Electrolytes ◽  
Room Temperature ◽  
Lithium Ion ◽  
Electrochemical Stability ◽  
Experimental Investigations ◽  
Dynamic Simulations

As an essential part of solid-state lithium-ion batteries, solid electrolytes are receiving increasing interest. Among all solid electrolytes, garnet-type Li7La3Zr2O12 (LLZO) has proven to be one of the most promising electrolytes because of its high ionic conductivity at room temperature, low activation energy, good chemical and electrochemical stability, and wide potential window. Since the first report of LLZO, extensive research has been done in both experimental investigations and theoretical simulations aiming to improve its performance and make LLZO a feasible solid electrolyte. These include developing different methods for the synthesis of LLZO, using different crucibles and different sintering temperatures to stabilize the crystal structure, and adopting different methods of cation doping to achieve more stable LLZO with a higher ionic conductivity and lower activation energy. It also includes intensive efforts made to reveal the mechanism of Li ion movement and understand its determination of the ionic conductivity of the material through molecular dynamic simulations. Nonetheless, more insightful study is expected in order to obtain LLZO with a higher ionic conductivity at room temperature and further improve chemical and electrochemical stability, while optimal multiple doping is thought to be a feasible and promising route. This review summarizes recent progress in the investigations of crystal structure and preparation of LLZO, and the impacts of doping on the lithium ionic conductivity of LLZO.

scholarly journals Computational Design of Double-Layer Cathode Coatings in All-Solid-State Batteries

2021 ◽  
Author(s):  
Chuhong Wang ◽  
Koutarou Aoyagi ◽  
Tim Mueller
Keyword(s):  
Solid State ◽  
Ionic Conductivity ◽  
Lithium Ion Batteries ◽  
Double Layer ◽  
Room Temperature ◽  
Lithium Ion ◽  
Computational Design ◽  
Superionic Conductors ◽  
Coating Materials ◽  
Oxide Electrodes

All-solid-state lithium-ion batteries have great potential for improved energy and power density compared to conventional lithium-ion batteries. With extensive research efforts devoted to the development of inorganic superionic conductors, lithium thiophosphates stand out due to their high ionic conductivity and room‐temperature processability. However battery rate performance still suffers from increased impedance attributed to the interfacial reactions between thiophosphate electrolyte and oxide electrodes. Stabilizing the interfaces with a protective coating layer has been proposed as a solution to the interfacial problem, but it is rare for a material to simultaneously exhibit fast ionic conductivity and chemical stability at battery interfaces. Here, we propose a double-layer coating design comprising a sulfide-based layer adjacent to the thiophosphate electrolyte accompanied by a layer that is stable against the oxide cathode. Based on a high-throughput thermodynamic stability screen and active learning molecular dynamics simulations, we identify several sulfide + halide couples that potentially outperform the known coating materials in interfacial stability as well as ionic conductivity. Several halides we identify have been recently identified as novel solid electrolyte candidates. We highlight the integration of room-temperature fast ionic conductors Li5B7S13 (137 mS cm−1), Li7Y7Zr9S32 (6.5 mS cm−1), and Li(TiS2)2 (0.0008 mS cm−1) which potentially reduces interfacial reactivity with minor loss of charge transfer rate through the thiophosphate electrolyte.

Rapid ionic conductivity of ternary composite electrolytes for superior solid-state batteries with high-rate performance and long cycle life operated at room temperature

2021 ◽  
Author(s):  
Wei Xiong ◽  
Tao Huang ◽  
Yuqing Feng ◽  
Xue Ye ◽  
Xiaoyan Li ◽  
...  
Keyword(s):  
Solid State ◽  
Ionic Conductivity ◽  
Room Temperature ◽  
High Rate ◽  
Composite Electrolytes ◽  
Ternary Composite ◽  
Safety Issues ◽  
Long Cycle Life ◽  
Solid State Batteries ◽  
High Rate Performance

Solid-state electrolytes (SSEs) are promising alternatives to traditional liquid electrolytes because of their safety issues. However, polymer SSEs have low ionic conductivity and weak mechanical strength, inorganic SSEs are very...

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