MOF-on-MOF Composites with UiO-66-Based Materials as Photocatalysts for the Overall Water Splitting under Sunlight Irradiation

All-solid-state lithium metal batteries (ASSLMBs) have garnered significant interest as a result of their enhanced safety features and higher energy density compared to traditional lithium-ion batteries with liquid electrolytes. Nonetheless, a substantial challenge within ASSLMBs lies in the constrained lithium-ion flux encountered in solid-state polymer electrolytes, resulting in subpar performance during high-current charging and discharging scenarios. This limitation detrimentally affects the electrochemical performance of ASSLMBs. In this present work, we introduce a novel composite solid polymer electrolyte (CSPE) comprising metal–organic frameworks, namely, UiO-66, poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP), and lithium bis(trifluoromethane)-sulfonimide (LiTFSI) (referred to as UPH-SPE). UPH-SPE containing 5 wt % UiO-66 demonstrates exceptional characteristics, including a high ionic conductivity of 4.7 × 10–4 S cm–1, an electrochemical stability window of 4.9 V, and a remarkable lithium-ion transference number of 0.58 at 25 °C. Full cell tests unequivocally showcase that these newly developed composite electrolytes exhibit significantly improved performance in terms of the rate capability and cycling stability at room temperature. Specifically, the discharge capacity of ASSLMBs with UPH-SPE remains at 140 mAh g–1 when operated at a current density of 0.5 C over 100 cycles. Even after 200 cycles, the capacity is sustained at 94 mAh g–1. This study underscores the potential of our CSPE film to advance the practical application of ASSLMBs, offering promising prospects for future developments in this field.

Section: ■ Results and Discussionmentioning

confidence: 99%

Poly(vinylidene fluoride-co-hexafluoropropylene)-Based Solid Polymer Electrolyte Incorporated with UiO-66 for Lithium Metal Batteries

Liu,

Xu,

Liu

et al. 2023

“…Researchers have shown more interest in using MOFs as precursors to create catalysts with specific structures and chemical components rather than utilizing them in their pristine form or as composite MOFs. − This approach has shown promise in enhancing the electrocatalytic activity of MOFs as HER catalysts through structural alteration. One advantage of these MOFs is their ability to overcome common drawbacks of other MOFs, such as poor inherent conductivity and constancy in electrolytes.…”

Section: Mofs Derivatives For Efficient Her Electrocatalysismentioning

confidence: 99%

Advances and Outlook of Metal–Organic Frameworks as High-Performance Electrocatalysts for Hydrogen Evolution Reaction: A Minireview

El Hanafi,

BaQais,

Saadi

et al. 2023

The increasing demand for renewable energy technologies to safeguard the natural world has led to electrocatalysis’s emergence as a promising hydrogen generation method. Recently, metal–organic frameworks (MOFs) have attracted interest as electrocatalysts due to their unique characteristics, including expansive surface areas, exceptional porosity, and readily modifiable optical and electronic properties. This review comprehensively summarizes MOFs’ recent improvement in heterogeneous catalysis and their composites/derivatives for promoting the high efficiency of the hydrogen evolution reaction (HER). Furthermore, a profound assessment of the challenges and expectations for the development of MOF-based electrocatalysts is provided.

“…Hence, monolithic formations are more conducive to keeping them stable during the reaction without a decrease in activity caused by weight loss and are beneficial to the recycling of materials. Next, industrial catalysis based on the direct heterogeneous catalysis of MOFs is introduced …”

Section: Applications Of Monolithic Mofsmentioning

confidence: 99%

Review and Perspectives of Monolithic Metal–Organic Frameworks: Toward Industrial Applications

Liu

et al. 2023

Metal−organic frameworks (MOFs) have attracted considerable attention owing to their large surface area and high structural tunability, which lead to a wide range of applications. Owing to excellent properties of MOFs in various applications, the synthesis process of MOFs has been gradually developed with high yields and stable shapes to fulfill industrial requirements. However, the industrial usage of traditional powder-formed MOFs is limited because powder may lead to safety issues and disperse easily. Therefore, MOFs with different shapes and standard properties are required for applications. This review has summarized currently reported methods for shaping MOFs, e.g., binder-based, high-pressure, surfactant-assisted, supercritical CO 2 (scCO 2 ), and sol−gel processes. The industrial applications based on shaped MOFs are summarized to support future studies on the formation of MOFs with stable shapes.