A quasi-solid-state rechargeable cell with high energy and superior safety enabled by stable redox chemistry of Li2S in gel electrolyte

2021 ◽  
Author(s):  
Xiangyu Meng ◽  
Yuzhao Liu ◽  
Zhiyu Wang ◽  
Yizhou Zhang ◽  
Xingyu Wang ◽  
...  
Keyword(s):  
Solid State ◽  
Redox Chemistry ◽  
High Energy ◽  
Gel Electrolyte ◽  
Organic P ◽  
Li Ion Batteries ◽  
Metal Anode ◽  
Rechargeable Cell ◽  
Li Ion ◽  
Li Metal Anode

Recent years have witnessed a thriving pursuit of high-energy Li metal batteries for replacing existing Li-ion batteries. However, the cell chemistry involving extremely reactive Li metal anode in flammable organic...

scholarly journals Electrolytes for Energy Dense Batteries

2020 ◽  
Author(s):  
Rana Mohtadi
Keyword(s):  
Solid State ◽  
Energy Density ◽  
Storage Systems ◽  
High Energy ◽  
High Energy Density ◽  
Li Ion Batteries ◽  
Future Perspectives ◽  
Research Directions ◽  
Electrochemical Storage ◽  
Li Ion

The ever-rising demands for energy dense electrochemical storage systems have been driving interests in beyond Li-ion batteries such as those based on lithium and magnesium metals. These high energy density batteries suffer from several challenges, several of which stem from the flammability/volatility of the electrolytes and/or instability of the electrolyte with either the negative, positive electrode or both. Recently, hydride-based electrolytes have been paving a path towards overcoming these issues. Namely, highly performing solid state electrolytes have been reported and several key challenges in multivalent batteries were overcome. In this review, the classes of hydride-based electrolytes reported for energy dense batteries are discussed. Future perspectives are presented to guide research directions in this field.

scholarly journals Modification of Lithium Metal Anode and Solid-State Electrolyte Interface with a Gel Electrolyte

2020 ◽  
Author(s):  
Lawrence Renna ◽  
Francois-Guillame Blanc ◽  
Vincent Giordani
Keyword(s):  
Solid State ◽  
Room Temperature ◽  
Gel Polymer Electrolyte ◽  
High Energy ◽  
Gel Electrolyte ◽  
High Energy Density ◽  
Interfacial Resistance ◽  
Metal Anode ◽  
Solid State Electrolytes ◽  
Metal Anodes

Solid-state electrolytes are continually being explored for Li-ion batteries due to their enhanced safety and their enabling of high energy density active materials, particularly Li metal anodes. However, the interface between solid-state electrolytes and Li metal anodes are prone to high impedance due to poor contact, limiting their applicability. Introducing a thin gel polymer electrolyte interlayer to conformally coat solid electrolytes can improve the interfacial contact of Li metal anode and thus reduce the interfacial resistance. Here we used a plasticized poly(ethylene oxide)-based electrolyte with high concentrations of bis(trifluoromethane)sulfonamide lithium (LiTFSI) that show 100% amorphous character. These electrolytes show Li+ conductivity as high as σ = 2.9×10-4 S/cm at room temperature. We discovered by thermogravimetric analysis (TGA) with off-gas analysis in conjunction with nuclear magnetic resonance (NMR) spectroscopy that the electrolyte films had absorbed N-methyl-2-pyrrolidone (NMP) vapors to form a gel electrolyte. We incorporated the gel electrolyte as an interfacial modification layer between LLZO and Li metal electrodes and found a 58 times reduction in the area specific resistance (ASR) at room temperature.

scholarly journals Enabling “lithium-free” manufacturing of pure lithium metal solid-state batteries through in situ plating

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Michael J. Wang ◽  
Eric Carmona ◽  
Arushi Gupta ◽  
Paul Albertus ◽  
Jeff Sakamoto
Keyword(s):  
Solid State ◽  
Energy Density ◽  
Current Collector ◽  
High Energy ◽  
High Energy Density ◽  
Nucleation Behavior ◽  
Metal Anode ◽  
Solid State Batteries ◽  
Li Metal Anode

AbstractThe coupling of solid-state electrolytes with a Li-metal anode and state-of-the-art (SOA) cathode materials is a promising path to develop inherently safe batteries with high energy density (>1000 Wh L−1). However, integrating metallic Li with solid-electrolytes using scalable processes is not only challenging, but also adds extraneous volume since SOA cathodes are fully lithiated. Here we show the potential for “Li-free” battery manufacturing using the Li7La3Zr2O12 (LLZO) electrolyte. We demonstrate that Li-metal anodes >20 μm can be electroplated onto a current collector in situ without LLZO degradation and we propose a model to relate electrochemical and nucleation behavior. A full cell consisting of in situ formed Li, LLZO, and NCA is demonstrated, which exhibits stable cycling over 50 cycles with high Coulombic efficiencies. These findings demonstrate the viability of “Li-free” configurations using LLZO which may guide the design and manufacturing of high energy density solid-state batteries.

scholarly journals Mechanism of Lithium Dendrites Formation and Suppression Strategies in Li Metal Batteries

2022 ◽  
Vol 2152 (1) ◽  
pp. 012026
Author(s):  
Zhiyu Xu
Keyword(s):  
Short Circuit ◽  
High Capacity ◽  
High Energy ◽  
High Energy Density ◽  
Lithium Metal ◽  
Metal Anode ◽  
Lithium Dendrites ◽  
Li Ion ◽  
Li Metal Anode ◽  
Increasing Demand

Abstract This paper describes and summarizes the modifying progress established on Li metal anode in recent years. With the increasing demand for high-capacity batteries, Li-ion batteries, one of the most commercialized batteries, can no longer meet the demand. Thus, the high-energy-density lithium metal battery using lithium metal as anode is widely researched due to the lowest electrochemical potential (-3.04 V) of lithium and ultimate theoretical capacity (3860 mAh/g). However, the Li dendrites formation becomes the main obstacle for the commercialization as it will trigger thermal runaway and short circuit. In this paper, the growth process of Li dendrites was discussed, and various modifying solutions based on electrolytes, Li alloy and current collectors to suppress Li dendrites were summarized.

scholarly journals Continuous plating/stripping behavior of solid-state lithium metal anode in a 3D ion-conductive framework

2018 ◽  
Vol 115 (15) ◽  
pp. 3770-3775 ◽  
Author(s):  
Chunpeng Yang ◽  
Lei Zhang ◽  
Boyang Liu ◽  
Shaomao Xu ◽  
Tanner Hamann ◽  
...  
Keyword(s):  
Solid State ◽  
Short Circuit ◽  
Current Collector ◽  
Clean Energy ◽  
High Energy ◽  
Interfacial Instability ◽  
Metal Anode ◽  
Lithium Metal Anode ◽  
Li Metal Anode ◽  
Metal Anodes

The increasing demands for efficient and clean energy-storage systems have spurred the development of Li metal batteries, which possess attractively high energy densities. For practical application of Li metal batteries, it is vital to resolve the intrinsic problems of Li metal anodes, i.e., the formation of Li dendrites, interfacial instability, and huge volume changes during cycling. Utilization of solid-state electrolytes for Li metal anodes is a promising approach to address those issues. In this study, we use a 3D garnet-type ion-conductive framework as a host for the Li metal anode and study the plating and stripping behaviors of the Li metal anode within the solid ion-conductive host. We show that with a solid-state ion-conductive framework and a planar current collector at the bottom, Li is plated from the bottom and rises during deposition, away from the separator layer and free from electrolyte penetration and short circuit. Owing to the solid-state deposition property, Li grows smoothly in the pores of the garnet host without forming Li dendrites. The dendrite-free deposition and continuous rise/fall of Li metal during plating/stripping in the 3D ion-conductive host promise a safe and durable Li metal anode. The solid-state Li anode shows stable cycling at 0.5 mA cm−2 for 300 h with a small overpotential, showing a significant improvement compared with reported Li anodes with ceramic electrolytes. By fundamentally eliminating the dendrite issue, the solid Li metal anode shows a great potential to build safe and reliable Li metal batteries.

High Energy Density Hybrid Solid-State Li-Ion Batteries Enabled by a Gel/Ceramic/Gel Sandwich Electrolyte

2020 ◽  
Vol 3 (6) ◽  
pp. 5113-5119
Author(s):  
Zihao Chen ◽  
Baichuan Han ◽  
Yuansheng Shi ◽  
Senhao Wang ◽  
Zhizhen Zhang ◽  
...  
Keyword(s):  
Solid State ◽  
Energy Density ◽  
High Energy ◽  
High Energy Density ◽  
Li Ion Batteries ◽  
Li Ion
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