Kinetically Stable Anode Interface for Li3YCl6-Based All-Solid-State Lithium Batteries

2021 ◽  
Author(s):  
Weixiao Ji ◽  
Dong Zheng ◽  
Xiaoxiao Zhang ◽  
Tianyao Ding ◽  
Deyang Qu
Keyword(s):  
Solid State ◽  
Ionic Conductivity ◽  
Oxidative Stability ◽  
Lithium Batteries ◽  
Solid Electrolytes ◽  
Metal Anode ◽  
Li Metal Anode

Despite excellent ionic conductivity and electrochemical oxidative stability, the emerging halide-based solid electrolytes suffer from inherent instability toward Li metal anode. A thick and resistive interface can be formed by...

scholarly journals Constructing a stable interface between sulfide electrolyte and Li metal anode via a Li+-conductive gel polymer interlayer

2021 ◽  
Author(s):  
Ya-Hui Wang ◽  
Junpei Yue ◽  
Wen-Peng Wang ◽  
Wan-Ping Chen ◽  
Ying Zhang ◽  
...  
Keyword(s):  
Ionic Conductivity ◽  
Solid Electrolytes ◽  
High Energy ◽  
High Ionic Conductivity ◽  
Practical Realization ◽  
Metal Anode ◽  
Li Metal Anode

Due to high ionic conductivity, favorable mechanical plasticity, and non-flammable properties, inorganic sulfide solid electrolytes bring opportunities to the practical realization of rechargeable Li-metal batteries with high energy, yet their...

Formation of Stable Interphase of Polymer-in-Salt Electrolyte in All-Solid-State Lithium Batteries

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Hongcai Gao ◽  
Nicholas S. Grundish ◽  
Yongjie Zhao ◽  
Aijun Zhou ◽  
John B. Goodenough
Keyword(s):  
Solid State ◽  
Ionic Conductivity ◽  
Lithium Batteries ◽  
Polymer Electrolytes ◽  
Solid Polymer Electrolytes ◽  
Solid Polymer ◽  
Lithium Metal ◽  
Practical Utilization ◽  
Metal Anode ◽  
Lithium Metal Anode

The integration of solid-polymer electrolytes into all-solid-state lithium batteries is highly desirable to overcome the limitations of current battery configurations that have a low energy density and severe safety concerns. Polyacrylonitrile is an appealing matrix for solid-polymer electrolytes; however, the practical utilization of such polymer electrolytes in all-solid-state cells is impeded by inferior ionic conductivity and instability against a lithium-metal anode. In this work, we show that a polymer-in-salt electrolyte based on polyacrylonitrile with a lithium salt as the major component exhibits a wide electrochemically stable window, a high ionic conductivity, and an increased lithium-ion transference number. The growth of dendrites from the lithium-metal anode was suppressed effectively by the polymer-in-salt electrolyte to increase the safety features of the batteries. In addition, we found that a stable interphase was formed between the lithium-metal anode and the polymer-in-salt electrolyte to restrain the uncontrolled parasitic reactions, and we demonstrated an all-solid-state battery configuration with a LiFePO4 cathode and the polymer-in-salt electrolyte, which exhibited a superior cycling stability and rate capability.

scholarly journals New Series of Ternary Metal Chloride Superionic Conductors for High Performance All-Solid-State Lithium Batteries

2021 ◽  
Author(s):  
Jianwen Liang ◽  
Eveline van der Maas ◽  
Jing Luo ◽  
Xiaona Li ◽  
Ning Chen ◽  
...  
Keyword(s):  
Solid State ◽  
Ionic Conductivity ◽  
Lithium Batteries ◽  
Solid Electrolytes ◽  
Room Temperature ◽  
Ionic Conductivities ◽  
Orthorhombic Phase ◽  
Superionic Conductors ◽  
Orthorhombic Structure ◽  
Trigonal Structure

Abstract Understanding the relationship between structure, ionic conductivity, and synthesis is the key to the development of solid electrolytes for all-solid-state Lithium batteries. Here, we investigate chloride solid electrolytes with compositions Li3 − 3xM1+xCl6 (-0.14 < x ≤ 0.5, M = Tb, Dy, Ho, Y, Er, Tm). When x > 0.04, a trigonal to orthorhombic phase transition occurs in the isostructural Li-Dy-Cl, Li-Ho-Cl, Li-Y-Cl, Li-Er-Cl and Li-Tm-Cl solid electrolytes. The new orthorhombic phase shows a four-fold increase in ionic conductivity up to 1.3×10− 3 S cm− 1 at room temperature for Li2.73Ho1.09Cl6 (x = 0.09) when compared to the trigonal Li3HoCl6. For isostructural Li-Dy-Cl, Li-Y-Cl, Li-Er-Cl and Li-Tm-Cl solid electrolytes, about one order of magnitude increase in ionic conductivities are observed for the orthorhombic structure compared to the trigonal structure. Using the Li-Ho-Cl components as an example, detailed studies of its structure, phase transition, ionic conductivity, air stability and electrochemical stability have been made. Molecular dynamics simulations based on density functional theory reveal that the different cations arrangement in the orthorhombic structure leads to a higher lithium diffusivity as compared to the trigonal structure, rationalizing the improved ionic conductivities of the new Li-M-Cl electrolytes. All-solid-state batteries of In/Li2.73Ho1.09Cl6/NMC811 demonstrate excellent electrochemical performance at both room temperature and − 10°C. As relevant to the vast number of isostructural halide electrolytes, the present structure control strategy provides guidance for the design of novel halide superionic conductors.

Silica-nanoresin Crosslinked Composite Polymer Electrolyte for Ambient-Temperature All-Solid-State Lithium Batteries

2021 ◽  
Author(s):  
Yixi Kuai ◽  
Feifei Wang ◽  
Jun Yang ◽  
Huichao Lu ◽  
Zhixin Xu ◽  
...  
Keyword(s):  
Energy Storage ◽  
Solid State ◽  
Ionic Conductivity ◽  
Ambient Temperature ◽  
Polymer Electrolyte ◽  
Lithium Batteries ◽  
Solid Electrolytes ◽  
Composite Polymer Electrolyte ◽  
Composite Polymer ◽  
Low Ambient Temperature

All-solid-state lithium batteries (ASSLBs) are in urgent demand for future energy storage. The basic problems are, however, low ambient-temperature ionic conductivity and narrow electrochemical windows of solid electrolytes as well...

Formation of Stable Interphase of Polymer-in-Salt Electrolyte in All-Solid-State Lithium Batteries

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Hongcai Gao ◽  
Nicholas S. Grundish ◽  
Yongjie Zhao ◽  
Aijun Zhou ◽  
John B. Goodenough
Keyword(s):  
Solid State ◽  
Ionic Conductivity ◽  
Lithium Batteries ◽  
Polymer Electrolytes ◽  
Solid Polymer Electrolytes ◽  
Solid Polymer ◽  
Lithium Metal ◽  
Practical Utilization ◽  
Metal Anode ◽  
Lithium Metal Anode

The integration of solid-polymer electrolytes into all-solid-state lithium batteries is highly desirable to overcome the limitations of current battery configurations that have a low energy density and severe safety concerns. Polyacrylonitrile is an appealing matrix for solid-polymer electrolytes; however, the practical utilization of such polymer electrolytes in all-solid-state cells is impeded by inferior ionic conductivity and instability against a lithium-metal anode. In this work, we show that a polymer-in-salt electrolyte based on polyacrylonitrile with a lithium salt as the major component exhibits a wide electrochemically stable window, a high ionic conductivity, and an increased lithium-ion transference number. The growth of dendrites from the lithium-metal anode was suppressed effectively by the polymer-in-salt electrolyte to increase the safety features of the batteries. In addition, we found that a stable interphase was formed between the lithium-metal anode and the polymer-in-salt electrolyte to restrain the uncontrolled parasitic reactions, and we demonstrated an all-solid-state battery configuration with a LiFePO4 cathode and the polymer-in-salt electrolyte, which exhibited a superior cycling stability and rate capability.

Enhanced Li+ conduction in perovskite Li3xLa2/3−x□1/3−2xTiO3 solid-electrolytes via microstructural engineering

2017 ◽  
Vol 5 (13) ◽  
pp. 6257-6262 ◽  
Author(s):  
Woo Ju Kwon ◽  
Hyeongil Kim ◽  
Kyu-Nam Jung ◽  
Woosuk Cho ◽  
Sung Hyun Kim ◽  
...  
Keyword(s):  
Solid State ◽  
Ionic Conductivity ◽  
Lithium Batteries ◽  
Solid Electrolytes ◽  
High Ionic Conductivity

To realize all-solid-state lithium batteries, it is necessary to develop solid electrolytes with high ionic conductivity and stability. A total Li+ conductivity as high as 4.8 × 10−4 S cm−1 can be achieved for perovskite Li3xLa(2/3)−x□(1/3)−2xTiO3 at 25 °C via microstructural modifications.

Experimental Assessment of the Practical Oxidative Stability of Lithium Thiophosphate Solid Electrolytes

2019 ◽  
Author(s):  
Georg Dewald ◽  
Saneyuki Ohno ◽  
Marvin Kraft ◽  
Raimund Koerver ◽  
Paul Till ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Solid State ◽  
Oxidative Stability ◽  
Photoelectron Spectroscopy ◽  
Solid Electrolytes ◽  
Stability Limit ◽  
Lithium Ion ◽  
High Energy ◽  
Redox Activity ◽  
Solid State Batteries

<p>All-solid-state batteries are often expected to replace conventional lithium-ion batteries in the future. However, the practical electrochemical and cycling stability of the best-conducting solid electrolytes, i.e. lithium thiophosphates, are still critical issues that prevent long-term stable high-energy cells. In this study, we use <i>stepwise</i><i>cyclic voltammetry </i>to obtain information on the practical oxidative stability limit of Li<sub>10</sub>GeP<sub>2</sub>S<sub>12</sub>, a Li<sub>2</sub>S‑P<sub>2</sub>S<sub>5</sub>glass, as well as the argyrodite Li<sub>6</sub>PS<sub>5</sub>Cl solid electrolytes. We employ indium metal and carbon black as the counter and working electrode, respectively, the latter to increase the interfacial contact area to the electrolyte as compared to the commonly used planar steel electrodes. Using a stepwise increase in the reversal potentials, the onset potential at 25 °C of oxidative decomposition at the electrode-electrolyte interface is identified. X‑ray photoelectron spectroscopy is used to investigate the oxidation of sulfur(-II) in the thiophosphate polyanions to sulfur(0) as the dominant redox process in all electrolytes tested. Our results suggest that after the formation of these decomposition products, significant redox behavior is observed. This explains previously reported redox activity of thiophosphate solid electrolytes, which contributes to the overall cell performance in solid-state batteries. The <i>stepwise cyclic voltammetry</i>approach presented here shows that the practical oxidative stability at 25 °C of thiophosphate solid electrolytes against carbon is kinetically higher than predicted by thermodynamic calculations. The method serves as an efficient guideline for the determination of practical, kinetic stability limits of solid electrolytes. </p>

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