Interconnected Three-Dimensional Porous Alginate-Based Gel Electrolytes for Lithium Metal Batteries

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(2), P. 2428 - 2437

Published: Jan. 2, 2024

Lithium batteries have been widely used in our daily lives for their high energy density and long-term stability. However, safety problems are of paramount concern consumers, which restricts scale applications. Gel polymer electrolytes (GPEs) compensate the defects liquid leakage lower ionic conductivity solid electrolytes, attracted a lot attention. Herein, 3D interconnected highly porous structural gel electrolyte was prepared with alginate dressing as host material, poly(ethylene oxide) (PEO), commercial electrolyte. With rich polar functional groups (CH2-CH2-O) segments on matrix, transportation Li+ is faster uniform; thus, formations lithium dendrite were significantly inhibited. The cycle stability symmetrical Li||Li modified composite (SAA) greatly improved, overpotential remains stable after more than 1000 h. Meanwhile, under same conditions, performance unmodified inferior overpotentials nearly 1 V 100 Additionally, capacity retention Li||LiFePO4 SAA 95% 200 cycles, while those others declined sharply. dressing-based GPEs can enhance mechanical thermal PEO-based GPEs, provides an environmentally friendly avenue electrolytes' applications batteries.

Language: Английский

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High-entropy perovskite fluoride ultrasmall nanoparticles embedded in carbon nanofibers enable accelerated redox kinetic for K storage

Energy & Environmental Science, Journal Year: 2024, Volume and Issue: 17(19), P. 7362 - 7371

Published: Jan. 1, 2024

Ultrasmall high-entropy perovskite fluoride nanoparticles impregnated in carbon nanofibers are prepared by electrospinning and pyrolysis. The unique structure prevents the conversion reaction shows a low-strain intercalation mechanism.

Language: Английский

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Strategies for developing layered oxide cathodes, carbon-based anodes, and electrolytes for potassium ion batteries

Materials Horizons, Journal Year: 2024, Volume and Issue: 11(9), P. 2053 - 2076

Published: Jan. 1, 2024

The progress in the development of layered metal oxide cathodes, carbon-based anodes, and electrolytes for potassium ion batteries is reviewed. Specific suggestions, concise perspectives, strategies are provided.

Language: Английский

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Surface Lattice Modulation Stabilizes K₂Mn[Fe(CN)₆] Cathode for High‐Energy K‐Ion Batteries

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: unknown

Published: July 3, 2024

Abstract Potassium‐ion batteries (PIBs) are considered as competitive candidates for energy storage applications due to their abundant resources and low cost. K 2 Mn[Fe(CN) 6 ] (KMnF) is an ideal cathode PIBs because of its high theoretical specific (≈600 Wh kg −1 ). However, it suffers from severe Mn dissolution complex phase transitions caused by Jahn–Teller distortion, resulting in rapid capacity decay. Here, a simple, controllable universal “transition metal (TM 2+ ) ion exchange” strategy proposed modulate the surface lattice KMnF, not only stabilizing structure but also maintaining inherent capacity. The substituted TM , including Fe Ni Cu or Co forming heterogeneous protection layer. Especially when modified redox‐active exhibits 144 mAh g considerable density 560 remarkable retention (86% after 1,000 cycles at 50 mA 71% 5,000 respectively). surface‐modified KMnF proved be effective preventing formation tetragonal distortion. This work provides simple high‐energy Mn‐based cathode.

Language: Английский

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Mn-doped FeNCN as advance anode for potassium ion batteries

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 489, P. 151286 - 151286

Published: April 14, 2024

Language: Английский

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