Analogue Molecular Doping Engineering Enables High Ionic Conductivity of Polyvinylidene Fluoride-Based Polymer Electrolytes DOI
Menghong Li, Ting Tian, Long Yang

и другие.

ACS Nano, Год журнала: 2025, Номер unknown

Опубликована: Май 22, 2025

Solid polymer electrolytes (SPEs) based on polyvinylidene fluoride (PVDF) are promising candidates due to their outstanding mechanical properties and intrinsic safety features. Unfortunately, the crystalline α phase of PVDF limits mobility lithium ions, thus leading low ion conductivity. Herein, a molecular doping strategy is proposed achieve high conductivity PVDF-based electrolyte (md-PVDF) via introducing dichloride (PVDC) reduce generation harmful PVDF. As analog PVDF, PVDC homogeneously dispersed in at arbitrary concentrations, it disrupts crystallization matrix. Moreover, chlorine functional group not only enhances dissociation Li salt but also reduces energy barrier lithium-ion migration. Consequently, resulting md-PVDF show significantly ionic (1.4 × 10-3 S cm-1 room temperature). The symmetric batteries with cycle stably for over 2000 h 0.1 mA cm-2, Li||LFP display excellent cycling stability 500 cycles rate 5 C. In addition, exhibit low-temperature performance, achieving an 3.0 10-4 -5 °C. This work demonstrates improve SPEs realize fast charging solid-state lithium.

Язык: Английский

Structural density of dendritic microstructures grown in circular domains: Micro- and nano-scale investigation DOI
Asghar Aryanfar,

Trina Dhara,

Sunando DasGupta

и другие.

Physics of Fluids, Год журнала: 2025, Номер 37(5)

Опубликована: Май 1, 2025

The stochastic instigation and growth of needle-like microstructures during the charging period in rechargeable batteries can cause hazard short circuit utilization, such that they control state health longevity. Herein, we aim at establishing relationship between solid-mass/empty-space fractions growing electrodeposits elaborate on interrelation structural density with electrodeposition parameters. We initially tackle estimating micro-scale ρMicro behavior through percolation-based image processing copper experiments correlate them to bulk salt concentration C0 as well applied voltage V0. Subsequently, establish a theoretical model for rate microstructures, considering both micro- nano-scale porosity. Since porosity directly correlates their kinetics (i.e., rate) growth, have estimated order ρNano∼[10−4,10−3] via comparing porous ramification modeling frameworks. Consequently, address branching pattern dendritic compute real-time fractal dimension vs explain it terms oscillatory nucleation branching. obtained understanding from correlation voltage, inherent atomic-scale range amorphous electrodeposits, could help tune morphology which be helpful applications avoid enhance

Язык: Английский

Процитировано

0
Analogue Molecular Doping Engineering Enables High Ionic Conductivity of Polyvinylidene Fluoride-Based Polymer Electrolytes DOI
Menghong Li, Ting Tian, Long Yang

и другие.

ACS Nano, Год журнала: 2025, Номер unknown

Опубликована: Май 22, 2025

Solid polymer electrolytes (SPEs) based on polyvinylidene fluoride (PVDF) are promising candidates due to their outstanding mechanical properties and intrinsic safety features. Unfortunately, the crystalline α phase of PVDF limits mobility lithium ions, thus leading low ion conductivity. Herein, a molecular doping strategy is proposed achieve high conductivity PVDF-based electrolyte (md-PVDF) via introducing dichloride (PVDC) reduce generation harmful PVDF. As analog PVDF, PVDC homogeneously dispersed in at arbitrary concentrations, it disrupts crystallization matrix. Moreover, chlorine functional group not only enhances dissociation Li salt but also reduces energy barrier lithium-ion migration. Consequently, resulting md-PVDF show significantly ionic (1.4 × 10-3 S cm-1 room temperature). The symmetric batteries with cycle stably for over 2000 h 0.1 mA cm-2, Li||LFP display excellent cycling stability 500 cycles rate 5 C. In addition, exhibit low-temperature performance, achieving an 3.0 10-4 -5 °C. This work demonstrates improve SPEs realize fast charging solid-state lithium.

Язык: Английский

Процитировано

0