High-Efficiency Lithium-Ion Transport in a Porous Coordination Chain-Based Hydrogen-Bonded Framework

Abstract

Fast and selective Li+ transport in solid plays a key role for the development of high-performance solid-state electrolytes (SSEs) of lithium metal batteries. Porous compounds with tunable Li+ transport pathways are promising SSEs, but the comprehensive performances in terms of Li+ transport kinetics, electrochemical stability window, and interfacial compatibility are difficult to be achieved simultaneously. Herein, we report a porous coordination chain-based hydrogen-bonded framework (NKU-1000) containing arrayed electronegative sites for Li+ transport, exhibiting a superior Li+ conductivity of 1.13 × 10–3 S cm–1, a high Li+ transfer number of 0.87, and a wide electrochemical window of 5.0 V. The assembled solid-state battery with NKU-1000-based SSE shows a high discharge capacity with 94.4% retention after 500 cycles and can work over a wide temperature range without formation of lithium dendrites, which derives from the linear hopping sites that promote a uniformly high-rate Li+ flux and the flexible structure that can buffer the structural variation during Li+ transport.

Tailored Silver Nanowires for Amplified Lithium-Ion Battery Performance and Inhibition of Lithium Dendrites in Silicon–Graphite–Silver Nanowire Composite Electrodes

“…Si lithiation results in the formation of Li x Si y . In this study, a Li–Ag layer can be formed first depending on the morphology characteristics of AgNWs formed on the electrode surface, and the Li–Ag alloy acts as a protective layer for the Si electrode, while the Li–Ag layer serves as a substrate for the uniform electrodeposition of Li ions. − Continuous lithiation leads to the formation of Li seeds within the Li–Ag layer. The unique 3D mesh type morphology and the lithiophilic AgNWs layer in this study are believed to induce uniform Li deposition and inhibit the formation of Li dendrites. , In order to confirm the effect of the AgNWs layer formed of grid structure on the electrode surface, AgNWs were coated on a mesh type dielectric glass fiber substrate, and the Li behavior was examined, as illustrated in Figure .…”

Hydrogen‐Bonding Assembly Meets Anion Coordination Chemistry: Framework Shaping and Polarity Tuning for Xenon/Krypton Separation

“…Currently, hydrogen-bonded organic frameworks (HOFs), [3] assembled from building blocks connected by hydrogen bonds (H-bonds), have been an emerging class of crystalline porous materials that attracted increasing attention. Owing to the inherent advantages such as mild synthesis conditions, solution processability, and facile regeneration by recrystallization, [3d,4] HOFs have revealed significant potential in the fields of gas storage and separation, [5] catalysis, [6] sensing, [7] proton conduction, [8] lithium-ion transport, [9] and enzyme encapsulation. [10] However, since supramolecular assemblies sustained by H-bonds are not rigid and directional as those stabilized by metal-ligand coordination and covalent bonds, it remains fairly challenging to regulate the H-bonding assembly behaviors while predicting the organization of H-bonded molecular building blocks.…”

A Bifunctional Coordination‐Chain‐Based Hydrogen‐Bonded Framework for Quantitative Enantioselective Sensing

“…[11,17] Recently, as new type of porous frameworks, coordination unit-based hydrogen-bonded frameworks have attracted great research interest. [18] Such frameworks combine the advantages of both metal-organic frameworks and hydrogen-bonded organic frameworks, which have hydrogen-bonded porosities with partial flexibilities from the hydrogen-bonded coordination units compared with rigid frameworks [19][20][21][22] and hence can be applied as host to accommodate functional guest species for specific applications. For the enantioselective recognition, it is still highly challenging to synthesize sensing materials with chiral ligands directly, due to the complex synthesis and high prices of chiral raw materials (Table S1).…”