The Coupling between Voltage Profiles and Mechanical Deformations in LAGP Solid Electrolyte During Li Plating and Stripping

AbstractA comprehensive time independent theory of the solid electrolyte(SE)–metal electrode interface is presented, using the assumption that cations are the only mobile charge carrier in the electrolyte. The temperature and the dc current across the SE are the only free parameters for the solutions along with three intrinsic parameters which depend on the properties of the particular system. The phenomenological model of the interface double layer is based on the Gouy–Chapman–Stern model.The numerical solutions of the theory for porous tungstenzeolite system enables us to predict most of the properties in the SE system such as;the current–overpotential characteristics, the capacitances of the double layer, concentration profile in the diffusion layer, the potential profile across the interface, electrochemical exchange current, and the potential of zero charge(PZC) etc. An experimental technique to measure the PZC of SE systems has been also proposed.

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Preventing Electrolyte Decomposition on a Ca Metal Electrode Interface Using an Artificial Solid‐Electrolyte Interphase

Advanced Theory and Simulations ◽

10.1002/adts.202100018 ◽

2021 ◽

pp. 2100018

Author(s):

Joshua Young ◽

Manuel Smeu

Keyword(s):

Solid Electrolyte ◽

Solid Electrolyte Interphase ◽

Metal Electrode ◽

Electrode Interface

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Rational Design of Quasi Zero-Strain NCM Cathode Materials for Minimizing Volume Change Effects in All-Solid-State Batteries

10.26434/chemrxiv.10000751.v1 ◽

2019 ◽

Author(s):

Florian Strauss ◽

Lea de Biasi ◽

A-Young Kim ◽

Jonas Hertle ◽

Simon Schweidler ◽

...

Keyword(s):

Solid State ◽

Solid Electrolyte ◽

Cathode Materials ◽

Rational Design ◽

Electrode Materials ◽

Cycling Performance ◽

Mechanical Degradation ◽

Volume Changes ◽

Solid State Batteries ◽

All Solid State Batteries

Measures to improve the cycling performance and stability of bulk-type all-solid-state batteries (SSBs) are currently being developed with the goal of substituting conventional Li-ion battery (LIB) technology. As known from liquid electrolyte based LIBs, layered oxide cathode materials undergo volume changes upon (de)lithiation, causing mechanical degradation due to particle fracture, among others. Unlike solid electrolytes, liquid electrolytes are somewhat capable of accommodating morphological changes. In SSBs, the rigidity of the materials used typically leads to adverse contact loss at the interfaces of cathode material and solid electrolyte during cycling. Hence, designing zero- or low-strain electrode materials for application in next-generation SSBs is desirable. In the present work, we report on novel Co-rich NCMs, NCM361 (60% Co) and NCM271 (70% Co), showing minor volume changes up to 4.5 V vs Li+/Li, as determined by operando X-ray diffraction and pressure measurements of LIB pouch and pelletized SSB cells, respectively. Both cathode materials exhibit good cycling performance when incorporated into SSB cells using argyrodite Li6PS5Cl solid electrolyte, albeit their morphology and secondary particle size have not yet been optimized.

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Rational Design of Quasi Zero-Strain NCM Cathode Materials for Minimizing Volume Change Effects in All-Solid-State Batteries

10.26434/chemrxiv.10000751 ◽

2019 ◽

Author(s):

Florian Strauss ◽

Lea de Biasi ◽

A-Young Kim ◽

Jonas Hertle ◽

Simon Schweidler ◽

...

Keyword(s):

Solid State ◽

Solid Electrolyte ◽

Cathode Materials ◽

Rational Design ◽

Electrode Materials ◽

Cycling Performance ◽

Mechanical Degradation ◽

Volume Changes ◽

Solid State Batteries ◽

All Solid State Batteries

Measures to improve the cycling performance and stability of bulk-type all-solid-state batteries (SSBs) are currently being developed with the goal of substituting conventional Li-ion battery (LIB) technology. As known from liquid electrolyte based LIBs, layered oxide cathode materials undergo volume changes upon (de)lithiation, causing mechanical degradation due to particle fracture, among others. Unlike solid electrolytes, liquid electrolytes are somewhat capable of accommodating morphological changes. In SSBs, the rigidity of the materials used typically leads to adverse contact loss at the interfaces of cathode material and solid electrolyte during cycling. Hence, designing zero- or low-strain electrode materials for application in next-generation SSBs is desirable. In the present work, we report on novel Co-rich NCMs, NCM361 (60% Co) and NCM271 (70% Co), showing minor volume changes up to 4.5 V vs Li+/Li, as determined by operando X-ray diffraction and pressure measurements of LIB pouch and pelletized SSB cells, respectively. Both cathode materials exhibit good cycling performance when incorporated into SSB cells using argyrodite Li6PS5Cl solid electrolyte, albeit their morphology and secondary particle size have not yet been optimized.

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Probing the Na metal solid electrolyte interphase via cryo-transmission electron microscopy

Nature Communications ◽

10.1038/s41467-021-23368-6 ◽

2021 ◽

Vol 12 (1) ◽

Author(s):

Bing Han ◽

Yucheng Zou ◽

Zhen Zhang ◽

Xuming Yang ◽

Xiaobo Shi ◽

...

Keyword(s):

Electron Microscopy ◽

Transmission Electron Microscopy ◽

Solid Electrolyte ◽

Solid Electrolyte Interphase ◽

Metal Electrode ◽

Liquid Electrolyte ◽

Battery Materials ◽

Cryogenic Transmission Electron Microscopy ◽

Transmission Electron ◽

Fluoroethylene Carbonate

AbstractCryogenic transmission electron microscopy (cryo-TEM) is a valuable tool recently proposed to investigate battery electrodes. Despite being employed for Li-based battery materials, cryo-TEM measurements for Na-based electrochemical energy storage systems are not commonly reported. In particular, elucidating the chemical and morphological behavior of the Na-metal electrode in contact with a non-aqueous liquid electrolyte solution could provide useful insights that may lead to a better understanding of metal cells during operation. Here, using cryo-TEM, we investigate the effect of fluoroethylene carbonate (FEC) additive on the solid electrolyte interphase (SEI) structure of a Na-metal electrode. Without FEC, the NaPF6-containing carbonate-based electrolyte reacts with the metal electrode to produce an unstable SEI, rich in Na2CO3 and Na3PO4, which constantly consumes the sodium reservoir of the cell during cycling. When FEC is used, the Na-metal electrode forms a multilayer SEI structure comprising an outer NaF-rich amorphous phase and an inner Na3PO4 phase. This layered structure stabilizes the SEI and prevents further reactions between the electrolyte and the Na metal.

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Study of lithium glassy solid electrolyte/electrode interface by impedance analysis

Bulletin of Materials Science ◽

10.1007/bf02719906 ◽

2000 ◽

Vol 23 (3) ◽

pp. 179-183 ◽

Cited By ~ 24

Author(s):

A. Karthikeyan ◽

P. Vinatier ◽

A. Levasseur

Keyword(s):

Solid Electrolyte ◽

Impedance Analysis ◽

Electrode Interface

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Solution-processable electrode-material embedding in dynamically inscribed nanopatterns (SPEEDIN) for continuous fabrication of durable flexible devices

Microsystems & Nanoengineering ◽

10.1038/s41378-021-00307-5 ◽

2021 ◽

Vol 7 (1) ◽

Author(s):

Wonseok Lee ◽

Hyoungseok Chae ◽

Dong Kyo Oh ◽

Minyoung Lee ◽

Hyunsoo Chun ◽

...

Keyword(s):

Electrode Material ◽

Flow Line ◽

Metal Electrode ◽

Metal Nanoparticle ◽

Power Efficient ◽

Flexible Devices ◽

Mechanical Deformations ◽

Solution Processable ◽

Flexible Metal ◽

Continuous Fabrication

AbstractA facile and scalable lithography-free fabrication technique, named solution-processable electrode-material embedding in dynamically inscribed nanopatterns (SPEEDIN), is developed to produce highly durable electronics. SPEEDIN uniquely utilizes a single continuous flow-line manufacturing process comprised of dynamic nanoinscribing and metal nanoparticle solution coating with selective embedding. Nano- and/or micro-trenches are inscribed into arbitrary polymers, and then an Ag nanoparticle solution is dispersed, soft-baked, doctor-bladed, and hard-baked to embed Ag micro- and nanowire structures into the trenches. Compared to lithographically embossed metal structures, the embedded SPEEDIN architectures can achieve higher durability with comparable optical and electrical properties and are robust and power-efficient even under extreme stresses such as scratching and bending. As one tangible application of SPEEDIN, we demonstrate a flexible metal electrode that can operate at 5 V at temperatures up to 300 °C even under the influence of harsh external stimuli. SPEEDIN can be applied to the scalable fabrication of diverse flexible devices that are reliable for heavy-duty operation in harsh environments involving high temperatures, mechanical deformations, and chemical hazards.

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