A Novel Orientation Aliphatic Ketone‐Based Liquid Crystal Polymer Electrolyte for High‐Voltage Solid‐State Lithium Metal Batteries

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 20, 2025

Abstract Low room temperature ionic conductivity and interfacial incompatibility severely hinder the further application of polymer electrolytes in lithium metal batteries. Here, a novel shear‐oriented (SO) aliphatic ketone‐carbonyl‐based liquid crystal composite solid electrolyte (FL 7 M 3 @CSPE SO ) is prepared by situ thermal‐polymerization monomer (FPZ‐LC, FL) N, N' ‐Methylenebisacrylamide (MBA, M) on cellulose nanofiber (CNF) presence triethylene‐glycol‐dimethyl‐ether (G salt (lithium bis(trifluoromethanesulphonyl)imide, LiTFSI). The high polarity keto‐carbonyl groups improves dissociation ability salt. highly oriented crystals provide rapid ion transport channels. Thus, FL achieves 10 −4 S cm −1 lithium‐ion transference number (t Li+ 0.52 at 30 °C. Besides, formed stable interface layer effectively inhibits growth dendrites. assembled Li/FL /Li cells operate stably over 5500 h 0.05 mA −2 (30 °C). Impressively, /NCM811 exhibits long‐term cycle 1200 with capacity retention 92% under C 4.4 V (−5 This work not only highlights advantages improving capacity, but also provides design strategy for advanced suitable lower high‐voltage solid‐state

Language: Английский

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Efficient Ion Migration and Stable Interface Chemistry of PVDF‐Based Electrolytes for Solid‐State Lithium Metal Batteries

Small, Journal Year: 2025, Volume and Issue: unknown

Published: April 27, 2025

Abstract Poly(vinylidene fluoride) (PVDF)‐based electrolytes with “Li salt‐polymer‐trace residual solvent” configuration have shown great potential in solid‐state lithium metal batteries (SSLMBs). However, the interface failure initiated by solvent and sluggish Li + migration kinetics caused intricacy of ‐interaction environment severely precludes large‐scale commercial application PVDF‐based SSLMBs. Herein, are fabricated compositing PVDF matrix sand‐ground silicon monoxide (SiO‐a) fillers monoxide/silicon‐suboxide/silicon‐dioxide (Si/SiO x (0< <2)/SiO 2 )heterostructure. Results show that SiO‐a not only forcefully anchors highly reactive N, N ‐dimethylformamide (DMF) molecules, significantly alleviating side reactions at electrode‐electrolyte interface, but also anchored DMF molecule dipole exhibits stronger bond moment (C═ O; 7.1 × 10 −30 C m) than (C─F; 3.6 m), thus weakens ion‐dipole interaction ···F, making ‐hopping easily along polymer chains. Consequently, obtained electrolyte dramatic electrochemical properties, including a superior ionic conductivity (0.39 mS cm −1 ) sufficient transference number (0.54). Additionally, LFP||Li battery presents an outstanding performance wide temperature range −10–60 °C. Even high mass loading ≈11 mg −2 , delivers impressive specific capacity (156.9 mAh g average coulombic efficiency (99.8%).

Language: Английский

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Establishing ion transport channels in plastic crystal electrolytes via multifunctional cross-linked polymer matrices for stable and safe lithium metal batteries

Nano Energy, Journal Year: 2025, Volume and Issue: unknown, P. 110959 - 110959

Published: April 1, 2025

Language: Английский

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Tailoring Li⁺ Local Coordination Environment of Solid Polymer Electrolytes to Boom Ionic Conductivity

Small, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 18, 2024

Abstract The low ionic conductivity is the key issue of solid polymer electrolytes (SPEs), hampering their practical application. Great efforts have been devoted to reducing crystallinity increase but ignored Li + local coordination environment influence. Here, tunable poly(vinylidene fluoride‐co‐hexafluoropropylene)‐based solid‐state are experimentally realized via d ‐cellobiose octaacetate. octaacetate competes with anions and chains for thorough C═O groups weaken , number carriers, strengthen transport kinetics booming SPEs at room temperature. When used in lithium metal symmetric batteries full batteries, greatly improve electrochemical performance 25 °C. This work clarifies important influence on provides a promising strategy SPEs.

Language: Английский

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POSS based poly (zwitterionic liquids) electrolytes with 3D crosslinked networks for lithium metal batteries

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 498, P. 155614 - 155614

Published: Sept. 8, 2024

Language: Английский

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