scholarly journals Long-term chemothermal stability of delithiated NCA in polymer solid-state batteries

2019 ◽  
Vol 7 (47) ◽  
pp. 27135-27147
Author(s):  
Münir M. Besli ◽  
Camille Usubelli ◽  
Michael Metzger ◽  
Sondra Hellstrom ◽  
Sami Sainio ◽  
...  
Keyword(s):  
Solid State ◽  
Oxidation State ◽  
Lithium Salt ◽  
Nickel Oxidation ◽  
Solid State Batteries

Changes in nickel oxidation state of chemically delithiated Li0.3Ni0.8Co0.15Al0.05O2 (NCA) in bulk and surface after 35 days @ 80 °C are strongly depending on the type of polymer and lithium salt in the catholyte matrix.

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.

SOLID STATE BATTERIES WITH CONDUCTING POLYMERS

1983 ◽  
Vol 44 (C3) ◽  
pp. C3-567-C3-572 ◽  
Author(s):  
F. Bénière ◽  
D. Boils ◽  
H. Cánepa ◽  
J. Franco ◽  
A. Le Corre ◽  
...  
Keyword(s):  
Solid State ◽  
Conducting Polymers ◽  
Solid State Batteries

Development of Solid Electrolytes for All-Solid-State Batteries

2019 ◽  
Vol 92 (11) ◽  
pp. 430-434
Author(s):  
Akitoshi HAYASHI ◽  
Atsushi SAKUDA ◽  
Masahiro TATSUMISAGO
Keyword(s):  
Solid State ◽  
Solid Electrolytes ◽  
Solid State Batteries ◽  
All Solid State Batteries

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.

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