A polyoxometalate-based polymer electrolyte with an improved electrode interface and ion conductivity for high-safety all-solid-state batteries

Compared with the fagile ceramic solid electrolyte, Li-ion conducting polymer electrolytes are flexible and have better contact with electrodes. However, the ionic conductivity of the polymer electrolytes is usually limited because of the slow segment motion of the polymer. In this work, we introduce porous Co3O4 cuboids to Poly (Ethylene Oxide)-based electrolyte (PEO) to investigate the influence of these cuboids on the ionic conductivity of the composite electrolyte and the performance of the all-solid-state batteries. The experiment results showed the porous cuboid Co3O4 fillers not only break the order motion of segments of the polymer to increase the amorphous phase amount, but also build Li+ continuous migration pathway along the Co3O4 surface by the Lewis acid-base interaction. The Li+ conductivity of the composite polymer electrolyte reaches 1.6 × 10−4 S cm−1 at 30°C. The good compatibility of the composite polymer electrolyte to Li metal anode and LiFePO4 cathode ensures good rate performance and long cycle life when applying in an all-solid-state LiFePO4 battery. This strategy points out the direction for developing the high-conducting composite polymer electrolytes for all-solid-state batteries.

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

Communications Materials ◽

10.1038/s43246-021-00216-0 ◽

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.

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Development of a Wire Reference Electrode for Lithium All-Solid-State Batteries with Polymer Electrolyte: FEM Simulation and Experiment

Journal of The Electrochemical Society ◽

10.1149/2.0671807jes ◽

2018 ◽

Vol 165 (7) ◽

pp. A1363-A1371 ◽

Cited By ~ 7

Author(s):

Fabian J. Simon ◽

Leonard Blume ◽

Matthias Hanauer ◽

Ulrich Sauter ◽

Jürgen Janek

Keyword(s):

Solid State ◽

Polymer Electrolyte ◽

Fem Simulation ◽

Reference Electrode ◽

Simulation And Experiment ◽

Solid State Batteries ◽

All Solid State Batteries

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Accessing the bottleneck in all-solid state batteries, lithium-ion transport over the solid-electrolyte-electrode interface

Nature Communications ◽

10.1038/s41467-017-01187-y ◽

2017 ◽

Vol 8 (1) ◽

Cited By ~ 131

Author(s):

Chuang Yu ◽

Swapna Ganapathy ◽

Ernst R. H. van Eck ◽

Heng Wang ◽

Shibabrata Basak ◽

...

Keyword(s):

Solid State ◽

Ion Transport ◽

Solid Electrolyte ◽

Lithium Ion ◽

Solid State Batteries ◽

Electrode Interface ◽

All Solid State Batteries

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Development of Novel High Li-Ion Conductivity Hybrid Electrolytes of Li10GeP2S12 (LGPS) and Li6.6La3Zr1.6Sb0.4O12 (LLZSO) for Advanced All-Solid-State Batteries

Oxygen ◽

10.3390/oxygen1010003 ◽

2021 ◽

Vol 1 (1) ◽

pp. 16-21

Author(s):

Linsheng Wang

Keyword(s):

Solid State ◽

Ionic Conductivity ◽

Weight Ratio ◽

Superionic Conductor ◽

Ion Conductivity ◽

Solid State Batteries ◽

Li Ion ◽

Li Batteries ◽

All Solid State Batteries

A lithium superionic conductor of Li10GeP2S12 that exhibits the highest lithium ionic conductivity among the sulfide electrolytes and the most promising oxide electrolytes, namely, Li6.6La3Sr0.06Zr1.6Sb0.4O12 and Li6.6La3Zr1.6Sb0.4O12, are successfully synthesized. Novel hybrid electrolytes with a weight ratio of Li6.6La3Zr1.6Sb0.4O12 to Li10GeP2S12 from 1/1 to 1/3 with the higher Li-ion conductivity than that of the pure Li10GeP2S12 electrolyte are developed for the fabrication of the advanced all-solid-state Li batteries.

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