Enhancing ionic conductivity and expanding the electrochemical window in polymer electrolytes via ferroelectric-metal-organic-frameworks to manipulate charge spatial distribution

Journal of Colloid and Interface Science, Journal Year: 2025, Volume and Issue: 685, P. 437 - 448

Published: Jan. 20, 2025

Language: Английский

---

In Situ Polymerization in COF Boosts Li-Ion Conduction in Solid Polymer Electrolytes for Li Metal Batteries

Nano-Micro Letters, Journal Year: 2025, Volume and Issue: 17(1)

Published: May 6, 2025

Abstract Solid polymer electrolytes (SPEs) have garnered considerable interest in the field of lithium metal batteries (LMBs) owing to their exceptional mechanical strength, excellent designability, and heightened safety characteristics. However, inherently low ion transport efficiency poses a major challenge for application LMBs. To address this issue, covalent organic framework (COF) with ordered channels, chemical stability, large specific surface area, designable multifunctional sites has shown promising potential enhance lithium-ion conduction. Here, we prepared an anionic COF, TpPa-COOLi, which can catalyze ring-opening copolymerization cyclic lactone monomers situ fabrication SPEs. The design leverages high area COF facilitate absorption polymerization precursor within pores, forming additional COF-polymer junctions that pathways. partial exfoliation achieved through these improved its dispersion matrix, preserving channels facilitating across grain boundaries. By controlling variables alter crystallinity TpPa-COOLi presence –COOLi substituents, long-range order substituents exhibited superior electrochemical performance. This research demonstrates constructing high-performance SPEs

Language: Английский

---

High Ion‐Conductive Interphase Enabled by Nitrate‐Ionic Liquid Additive for Low‐Temperature Lithium Metal Batteries

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

Published: Sept. 28, 2024

Abstract The development of high‐performance low‐temperature lithium metal batteries (LMBs) is hindered by severe dendrite growth and sluggish charge transfer, both which can be effectively addressed constructing a robust solid electrolyte interphase (SEI) with improved Li + transport kinetics. Compared to the soft organic SEI layers, LiF‐rich shows sufficient mechanical strength impede growth, however, its extremely low ionic conductivity (≈10 −13 S cm −1 ) hinders kinetics at temperatures. Herein, quasi‐ionic liquid (QIL, [Li(15‐crown‐5)]NO 3 additive rich NO − developed introducing 15‐crown‐5 into LiNO , induces in situ formation abundant N. Impressively, this N exhibits superior affinity lower diffusion barriers as learned from empirical computational studies, suggesting that it may powerful conquer temperature. With assistance QIL additive, Li/LiCoO 2 cells high mass loading 11.5 mg −2 demonstrate stable cycling for 250 cycles without any capacity decay ‐20 °C. This work opens an emerging avenue construct LMBs manipulating composition.

Language: Английский

---

Novel design of hollow carbon nanocage modified with nanotubes as a bifunctional electrocatalyst for high performance Zn–air batteries

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 679, P. 102 - 113

Published: Oct. 18, 2024

Language: Английский

---

Electric Field and Nanocontact Effects in Metal–Organic Framework/Li_6.4La₃Zr_1.4Ta_0.6O₁₂ Ionic Conductors for Fast Interfacial Lithium-Ion Transport Kinetics

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(44), P. 60268 - 60277

Published: Oct. 23, 2024

The slow ion transport kinetics inside or between the nanofillers in composite polymer electrolytes (CPEs) lead to formation of lithium dendrites for solid-state batteries. To address critical issues, CPEs (U@UNL) composed a UIO-66@UIO-66-NH2 (U@UN) core-shell heterostructure and Li6.4La3Zr1.4Ta0.6O12 (LLZTO) filler is designed. Due different band structures U@UN heterostructure, built-in electric field constructed promote transfer carriers. Besides, introduction LLZTO facilitates close nanometer contact interface LLZTO, reducing impedance accelerating lithium-ion rate. As benefit from interface, U@UNL exhibits wide electrochemical window 5.17 V, large transference number 0.76, high ionic conductivity 3.50 × 10-3 S cm-1. Consequently, electrolyte possesses excellent interfacial stability against Li metal after 1200 h at 0.1 mA cm-2 shows specific capacity 160.2 152.6 mAh g-1 0.5 1 C, respectively. This work proposes complete strategy building high-performance batteries by LLZTO.

Language: Английский

---

Innovative doping strategies for Li2ZrCl6 solid electrolytes: A first-principles approach

Journal of Energy Storage, Journal Year: 2024, Volume and Issue: 107, P. 115017 - 115017

Published: Dec. 13, 2024

Language: Английский

---