Observation of chemo-mechanical failure and influence of cut-off potentials in all-solid-state Li-S batteries

2019 ◽  
Author(s):  
Saneyuki Ohno ◽  
Georg Dewald ◽  
Raimund Koerver ◽  
Carolin Rosenbach ◽  
Paul Titscher ◽  
...  
Keyword(s):  
Solid State ◽  
High Capacity ◽  
Reversible Capacity ◽  
Mechanical Failure ◽  
Volume Changes ◽  
Long Term Stability ◽  
Solid State Batteries ◽  
S Model

<p>Owing to a remarkably high theoretical energy density, the lithium-sulfur (Li-S) battery has attracted significant attention as a candidate for next-generation batteries. While employing solid electrolytes can provide a new avenue for high capacity Li-S cells, all-solid-state batteries have unique failure mechanisms such as chemo-mechanical failure due to the volume changes of active materials. In this study, we investigate all-solid-state Li-S model cells with differently processed cathode composites and elucidate a typical failure mechanism stemming from irreversible Li<sub>2</sub>S formation in the cathode composites. Reducing the particle size is key to minimizing the influence of volume changes and a capacity of over 1000 mAh g<sub>sulfur</sub><sup>-1</sup>is achieved by ball-milling of the cathode composites. In addition, the long-term stability of the ball-milled cathode is investigated by varying upper and lower cut-off potentials for cycling, which results in unveiling the significantly detrimental role of the lower cut-off potential. Preventing a deep-discharge leads to a reversible capacity of 800 mAh g<sub>sulfur</sub><sup>-1</sup>over 50 cycles in the optimized cell. This work highlights the importance of mitigating chemo-mechanical failure using microstructural engineering as well as the influence of the cut-off potentials in all-solid-state Li-S batteries. </p>

Observation of chemo-mechanical failure and influence of cut-off potentials in all-solid-state Li-S batteries

2019 ◽  
Author(s):  
Saneyuki Ohno ◽  
Georg Dewald ◽  
Raimund Koerver ◽  
Carolin Rosenbach ◽  
Paul Titscher ◽  
...  
Keyword(s):  
Solid State ◽  
High Capacity ◽  
Reversible Capacity ◽  
Mechanical Failure ◽  
Volume Changes ◽  
Long Term Stability ◽  
Solid State Batteries ◽  
S Model

<p>Owing to a remarkably high theoretical energy density, the lithium-sulfur (Li-S) battery has attracted significant attention as a candidate for next-generation batteries. While employing solid electrolytes can provide a new avenue for high capacity Li-S cells, all-solid-state batteries have unique failure mechanisms such as chemo-mechanical failure due to the volume changes of active materials. In this study, we investigate all-solid-state Li-S model cells with differently processed cathode composites and elucidate a typical failure mechanism stemming from irreversible Li<sub>2</sub>S formation in the cathode composites. Reducing the particle size is key to minimizing the influence of volume changes and a capacity of over 1000 mAh g<sub>sulfur</sub><sup>-1</sup>is achieved by ball-milling of the cathode composites. In addition, the long-term stability of the ball-milled cathode is investigated by varying upper and lower cut-off potentials for cycling, which results in unveiling the significantly detrimental role of the lower cut-off potential. Preventing a deep-discharge leads to a reversible capacity of 800 mAh g<sub>sulfur</sub><sup>-1</sup>over 50 cycles in the optimized cell. This work highlights the importance of mitigating chemo-mechanical failure using microstructural engineering as well as the influence of the cut-off potentials in all-solid-state Li-S batteries. </p>

Observation of chemo-mechanical failure and influence of cut-off potentials in all-solid-state Li-S batteries

2019 ◽  
Author(s):  
Wolfgang Zeier ◽  
Saneyuki Ohno ◽  
Raimund Koerver ◽  
Georg Dewald ◽  
Juergen Janek ◽  
...  
Keyword(s):  
Solid State ◽  
High Capacity ◽  
Reversible Capacity ◽  
Mechanical Failure ◽  
Volume Changes ◽  
Long Term Stability ◽  
Solid State Batteries ◽  
S Model

<p>Owing to a remarkably high theoretical energy density, the lithium-sulfur (Li-S) battery has attracted significant attention as a candidate for next-generation batteries. While employing solid electrolytes can provide a new avenue for high capacity Li-S cells, all-solid-state batteries have unique failure mechanisms such as chemo-mechanical failure due to the volume changes of active materials. In this study, we investigate all-solid-state Li-S model cells with differently processed cathode composites and elucidate a typical failure mechanism stemming from irreversible Li<sub>2</sub>S formation in the cathode composites. Reducing the particle size is key to minimizing the influence of volume changes and a capacity of over 1000 mAh g<sub>sulfur</sub><sup>-1</sup>is achieved by ball-milling of the cathode composites. In addition, the long-term stability of the ball-milled cathode is investigated by varying upper and lower cut-off potentials for cycling, which results in unveiling the significantly detrimental role of the lower cut-off potential. Preventing a deep-discharge leads to a reversible capacity of 800 mAh g<sub>sulfur</sub><sup>-1</sup>over 50 cycles in the optimized cell. This work highlights the importance of mitigating chemo-mechanical failure using microstructural engineering as well as the influence of the cut-off potentials in all-solid-state Li-S batteries. </p>

The stable cycling of a high-capacity Bi anode enabled by an in situ-generated Li3PO4 transition layer in a sulfide-based all-solid-state battery

2020 ◽  
Vol 56 (98) ◽  
pp. 15458-15461
Author(s):  
Qin Li ◽  
Yi Cao ◽  
Geping Yin ◽  
Yunzhi Gao
Keyword(s):  
Solid State ◽  
Transition Layer ◽  
High Capacity ◽  
Cycling Stability ◽  
Solid State Battery ◽  
Solid State Batteries ◽  
All Solid State Batteries

A low-potential Bi anode with long-term cycling stability protected by a Li3PO4 transition layer has been achieved in all-solid-state batteries containing a sulfide-based electrolyte.

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

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<sup>+</sup>/Li, as determined by <i>operando</i> 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 Li<sub>6</sub>PS<sub>5</sub>Cl solid electrolyte, albeit their morphology and secondary particle size have not yet been optimized.

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

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<sup>+</sup>/Li, as determined by <i>operando</i> 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 Li<sub>6</sub>PS<sub>5</sub>Cl solid electrolyte, albeit their morphology and secondary particle size have not yet been optimized.

THE ROLE OF POLYETHYLENIMINE IN ENHANCING PERFORMANCE OF GLUTAMATE BIOSENSORS

2018 ◽  
Vol 8 (3) ◽  
pp. 36-41
Author(s):  
Diep Do Thi Hong ◽  
Duong Le Phuoc ◽  
Hoai Nguyen Thi ◽  
Serra Pier Andrea ◽  
Rocchitta Gaia
Keyword(s):  
First Generation ◽  
Good Reproducibility ◽  
Complex Matrices ◽  
Long Term Stability ◽  
In Vitro Characterization ◽  
Glutamate Oxidase

Background: The first biosensor was constructed more than fifty years ago. It was composed of the biorecognition element and transducer. The first-generation enzyme biosensors play important role in monitoring neurotransmitter and determine small quantities of substances in complex matrices of the samples Glutamate is important biochemicals involved in energetic metabolism and neurotransmission. Therefore, biosensors requires the development a new approach exhibiting high sensibility, good reproducibility and longterm stability. The first-generation enzyme biosensors play important role in monitoring neurotransmitter and determine small quantities of substances in complex matrices of the samples. The aims of this work: To find out which concentration of polyethylenimine (PEI) exhibiting the most high sensibility, good reproducibility and long-term stability. Methods: We designed and developed glutamate biosensor using different concentration of PEI ranging from 0% to 5% at Day 1 and Day 8. Results: After Glutamate biosensors in-vitro characterization, several PEI concentrations, ranging from 0.5% to 1% seem to be the best in terms of VMAX, the KM; while PEI content ranging from 0.5% to 1% resulted stable, PEI 1% displayed an excellent stability. Conclusions: In the result, PEI 1% perfomed high sensibility, good stability and blocking interference. Furthermore, we expect to develop and characterize an implantable biosensor capable of detecting glutamate, glucose in vivo. Key words: Glutamate biosensors, PEi (Polyethylenimine) enhances glutamate oxidase, glutamate oxidase biosensors

Nanostructured Lipid Carriers (NLCs) for drug delivery: Role of Liquid lipid (oil)

2020 ◽  
Vol 17 ◽  
Author(s):  
Anisha D’Souza ◽  
Ranjita Shegokar
Keyword(s):  
Drug Delivery ◽  
Essential Oils ◽  
Drug Carrier ◽  
Drug Loading ◽  
Performance Criteria ◽  
Long Term Stability ◽  
Natural Oils ◽  
Optimal Drug

: In recent years, SLNs and NLCs are among the popular drug delivery systems studied for delivery of lipophilic drugs. Both systems have demonstrated several beneficial properties as an ideal drug-carrier, optimal drug-loading and good long-term stability. NLCs are getting popular due to their stability advantages and possibility to load various oil components either as an active or as a matrix. This review screens types of oils used till date in combination with solid lipid to form NLCs. These oils are broadly classified in two categories: Natural oils and Essential oils. NLCs offer range advantages in drug delivery due to the formation of imperfect matrix owing to the presence of oil. The type and percentage of oil used determines optimal drug loading and stability. Literature shows that variety of oils is used in NLCs mainly as matrix, which is from natural origin, triglycerides class. On the other hand, essential oils not only serve as a matrix but as an active. In short, oil is the key ingredient in formation of NLCs, hence needs to be selected wisely as per the performance criteria expected.

scholarly journals Suppressing Void Formation in All-Solid-State Batteries: The Role of Interfacial Adhesion on Alkali Metal Vacancy Transport

2021 ◽  
Author(s):  
Ieuan Seymour ◽  
Ainara Aguadero
Keyword(s):  
Solid State ◽  
Interfacial Adhesion ◽  
Void Formation ◽  
Rechargeable Batteries ◽  
Metal Anode ◽  
Solid State Batteries ◽  
Promising Solution ◽  
Metal Vacancy ◽  
All Solid State Batteries

All-solid-state batteries containing a solid electrolyte and a lithium (Li) or sodium (Na) metal anode are a promising solution to simultaneously increase the energy density and safety of rechargeable batteries....

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