scholarly journals Infiltrated and Isostatic Laminated NCM and LTO Electrodes with Plastic Crystal Electrolyte Based on Succinonitrile for Lithium-Ion Solid State Batteries

Batteries ◽  
2021 ◽  
Vol 7 (1) ◽  
pp. 11
Author(s):  
Matthias Coeler ◽  
Vanessa van Laack ◽  
Frederieke Langer ◽  
Annegret Potthoff ◽  
Sören Höhn ◽  
...  
Keyword(s):  
Solid State ◽  
Polymer Electrolyte ◽  
Porous Electrode ◽  
Active Material ◽  
Tape Casting ◽  
Lithium Ion ◽  
Porous Electrodes ◽  
Plastic Crystal ◽  
Crystal Polymer ◽  
Solid State Batteries

We report a new process technique for electrode manufacturing for all solid-state batteries. Porous electrodes are manufactured by a tape casting process and subsequently infiltrated by a plastic crystal polymer electrolyte (PCPE). With a following isostatic lamination process, the PCPE was further integrated deeply into the porous electrode layer, forming a composite electrode. The PCPE comprises the plastic crystal succinonitrile (SN), lithium conductive salt LiTFSI and polyacrylonitrile (PAN) and exhibits suitable thermal, rheological (ƞ = 0.6 Pa s @ 80 °C 1 s−1) and electrochemical properties (σ > 10−4 S/cm @ 45 °C). We detected a lowered porosity of infiltrated and laminated electrodes through Hg porosimetry, showing a reduction from 25.6% to 2.6% (NCM infiltrated to laminated) and 32.9% to 4.0% (LTO infiltrated to laminated). Infiltration of PCPE into the electrodes was further verified by FESEM images and EDS mapping of sulfur content of the conductive salt. Cycling tests of full cells with NCM and LTO electrodes with PCPE separator at 45 °C showed up to 165 mAh/g at 0.03C over 20 cycles, which is about 97% of the total usable LTO capacity with a coulomb efficiency of between 98 and 99%. Cycling tests at 0.1C showed a capacity of ~128 mAh/g after 40 cycles. The C-rate of 0.2C showed a mean capacity of 127 mAh/g. In summary, we could manufacture full cells using a plastic crystal polymer electrolyte suitable for NCM and LTO active material, which is easily to be integrated into porous electrodes and which is being able to be used in future cell concepts like bipolar stacked cells.

scholarly journals Lithium-ion-conductive sulfide polymer electrolyte with disulfide bond-linked PS4 tetrahedra for all-solid-state batteries

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Atsutaka Kato ◽  
Mari Yamamoto ◽  
Futoshi Utsuno ◽  
Hiroyuki Higuchi ◽  
Masanari Takahashi
Keyword(s):  
Solid State ◽  
Polymer Electrolyte ◽  
High Capacity ◽  
Lithium Ion ◽  
High Energy ◽  
High Energy Density ◽  
Capacity Fading ◽  
Enhanced Solubility ◽  
Solid State Batteries ◽  
All Solid State Batteries

AbstractDue to their high conductivity and interface formability, sulfide electrolytes are attractive for use in high energy density all-solid-state batteries. However, electrode volume changes during charge-discharge cycling typically cause mechanical contact losses at the electrode/electrolyte interface, which leads to capacity fading. Here, to suppress this contact loss, isolated PS43- anions are reacted with iodine to prepare a sulfide polymer electrolyte that forms a sticky gel during dispersion in anisole and drying of the resulting supernatant. This polymer, featuring flexible (–P–S–S–)n chains and enhanced solubility in anisole, is applied as a lithium-ion-conductive binder in sheet-type all-solid-state batteries, creating cells with low resistance and high capacity retention.

scholarly journals A reversible oxygen redox reaction in bulk-type all-solid-state batteries

2020 ◽  
Vol 6 (25) ◽  
pp. eaax7236 ◽  
Author(s):  
Kenji Nagao ◽  
Yuka Nagata ◽  
Atsushi Sakuda ◽  
Akitoshi Hayashi ◽  
Minako Deguchi ◽  
...  
Keyword(s):  
Solid State ◽  
Energy Density ◽  
Redox Reaction ◽  
Large Scale ◽  
Electrode Materials ◽  
Active Material ◽  
Lithium Ion ◽  
Stable Operation ◽  
Solid State Batteries ◽  
All Solid State Batteries

An all-solid-state lithium battery using inorganic solid electrolytes requires safety assurance and improved energy density, both of which are issues in large-scale applications of lithium-ion batteries. Utilization of high-capacity lithium-excess electrode materials is effective for the further increase in energy density. However, they have never been applied to all-solid-state batteries. Operational difficulty of all-solid-state batteries using them generally lies in the construction of the electrode-electrolyte interface. By the amorphization of Li2RuO3 as a lithium-excess model material with Li2SO4, here, we have first demonstrated a reversible oxygen redox reaction in all-solid-state batteries. Amorphous nature of the Li2RuO3-Li2SO4 matrix enables inclusion of active material with high conductivity and ductility for achieving favorable interfaces with charge transfer capabilities, leading to the stable operation of all-solid-state batteries.

UV-curable-based plastic crystal polymer electrolyte for high-performance all-solid-state Li-ion batteries

Ionics ◽  
2018 ◽  
Vol 25 (4) ◽  
pp. 1607-1615 ◽  
Author(s):  
Yang Lu ◽  
Ke-Wu He ◽  
Shu-Jian Zhang ◽  
Yu-Xiang Zhou ◽  
Zhen-Bo Wang
Keyword(s):  
Solid State ◽  
Polymer Electrolyte ◽  
High Performance ◽  
Plastic Crystal ◽  
Li Ion Batteries ◽  
Uv Curable ◽  
Crystal Polymer ◽  
Li Ion

scholarly journals Influence of Iron Sulfide Nanoparticle Sizes in Solid-State Batteries

2021 ◽  
Author(s):  
Dewald George ◽  
Zainab Liaqat ◽  
Martin Alexander Lange ◽  
Wolfgang Tremel ◽  
Wolfgang Zeier
Keyword(s):  
Solid State ◽  
Iron Sulfide ◽  
Active Material ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Average Particle ◽  
Synthesis Conditions ◽  
General Importance ◽  
Solid State Batteries ◽  
Positive Effect

<p>Given the inherent performance limitations of intercalation-based lithium-ion batteries, solid-state conversion batteries are promising systems for future energy storage. A high specific capacity and natural abundancy make iron disulfide (FeS<sub>2</sub>) a promising cathode active material. In this work, FeS<sub>2</sub> nanoparticles were prepared solvothermally. By adjusting the synthesis conditions, samples with average particle diameters between 8 and 31 nm were synthesized. The electrochemical performance was evaluated in solid-state cells with a Li‑argyrodite solid electrolyte. While the reduction of FeS<sub>2</sub> was found to be irreversible in the initial discharge, a stable cycling of the reduced species was observed subsequently. A positive effect of smaller particle dimensions on FeS<sub>2</sub> utilization was identified, which can be attributed to a higher interfacial contact area and shortened diffusion pathways inside the FeS<sub>2</sub> particles. These results highlight the general importance of morphological design to exploit the promising theoretical capacity of conversion electrodes in solid-state batteries.</p>

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