Infomat最新文献

All-solid Na-ion batteries (ASNIBs) present significant potential for integration into large-scale energy storage systems, capitalizing on their abundant raw materials, exemplary safety, and high energy density. Among the pivotal components propelling the advancement of ASNIBs, inorganic solid electrolytes (ISEs) have garnered substantial attention in recent years due to their high ionic conductivity (σ), wide electrochemical stability window (ESW), and high shear modulus. Herein, this review systematically encapsulates the latest strides in Na-ion ISEs, furnishing a comprehensive panorama of various ISE systems along with their interface engineering strategies against the electrodes. The prime focus resides in accentuating key strategies for refining ion conduction properties and interfacial compatibility of ISEs through structure design and interface modification. Furthermore, the review explores the foremost challenges and prospects inherent to sodium-ion ISEs, striving to deepen our understanding of how to engineer more robust and efficient ISEs and interface stability, poised for the forthcoming era of advanced ASNIBs.

Aqueous zinc-ion batteries (AZIBs) have garnered significant research interest as promising next-generation energy storage technologies owing to their affordability and high level of safety. However, their restricted ionic conductivity at subzero temperatures, along with dendrite formation and subsequent side reactions, unavoidably hinder the implementation of grid-scale applications. In this study, a novel bimetallic cation-enhanced gel polymer electrolyte (Ni/Zn-GPE) was engineered to address these issues. The Ni/Zn-GPE effectively disrupted the hydrogen-bonding network of water, resulting in a significant reduction in the freezing point of the electrolyte. Consequently, the designed electrolyte demonstrates an impressive ionic conductivity of 28.70 mS cm⁻¹ at −20°C. In addition, Ni²⁺ creates an electrostatic shielding interphase on the Zn surface, which confines the sequential Zn²⁺ nucleation and deposition to the Zn (002) crystal plane. Moreover, the intrinsically high activation energy of the Zn (002) crystal plane generated a dense and dendrite-free plating/stripping morphology and resisted side reactions. Consequently, symmetrical batteries can achieve over 2700 hours of reversible cycling at 5 mA cm⁻², while the Zn || V₂O₅ battery retains 85.3% capacity after 1000 cycles at −20°C. This study provides novel insights for the development and design of reversible low-temperature zinc-ion batteries.

Solid-state Li metal battery has attracted increasing interests for its potentially high energy density and excellent safety assurance, which is a promising candidate for next generation battery system. However, the low ionic conductivity and Li⁺ transport number of solid-state polymer electrolytes limit their practical application. Herein, a composite polymer electrolyte with self-inserted structure is proposed using the layered double hydroxides (LDHs) as dopant to achieve a fast Li⁺ transport channel in poly(vinylidene-co-trifluoroethylene) [P(VDF-TrFE)] based polymer electrolyte. In such a composite electrolyte, P(VDF-TrFE) polymer has an all-trans conformation, in which all fluorine atoms locate on one side of the polymer chain, providing fast Li⁺ transport highways. Meanwhile, the LDH can immobilize the anions of Li salts based on the electrostatic interactions, promoting the dissociation of Li salts, thereby enhancing the ionic conductivity (6.4 × 10⁻⁴ S cm⁻¹) and Li⁺ transference number (0.76). The anion immobilization effect can realize uniform electric field distribution at the anode surface and suppress the dendritic Li growth. Moreover, the hydrogen bonding interaction between LDH and polymer chains also endows the composite electrolyte with strong mechanical properties. Thus, at room temperature, the Li || Li symmetric cells can be stably cycled over 1000 h at a current density of 0.2 mA cm⁻², and the full cells with LiFePO₄ cathode deliver a high capacity retention (>95%) after 200 cycles. This work offers a promising route to construct solid-state polymer electrolytes with fast Li⁺ transport.

Delocalized electron engineering of layer-structured V₂O₅ cathode is proposed to facilitate free Zn²⁺ formation and diffusion under low temperature.

Most electrocatalysts are known to experience structural change during the oxygen evolution reaction (OER) process. Considerable endeavors have been dedicated thus far to comprehending the catalytic process and uncovering the underlying mechanism. During the dynamic evolution of catalyst structure, component leaching of electrocatalysts is the most common phenomenon. This article offers a concise overview of recent findings and developments related to the leaching phenomena in the OER process in terms of fundamental understanding of leaching, advanced characterization techniques used to investigate leaching, leaching of inactive components, and leaching of active components. Leaching behaviors and the induced effects in various kinds of OER catalysts are discussed, progress in manipulating leaching amount/degree toward a tunable surface evolution is spotlighted, and finally, three representative types of structure transformations induced by leaching metastable species in OER condition are proposed. By understanding the process of component leaching in the OER, it will provide more guidance for the rational design of superior electrocatalysts.

Electrochemical transformation processes involving carbon, hydrogen, oxygen, nitrogen, and small-molecule chemistries represent a promising means to store renewable energy sources in the form of chemical energy. However, their widespread deployment is hindered by a lack of efficient, selective, durable, and affordable electrocatalysts. Recently, grain boundary (GB) engineering as one category of defect engineering, has emerged as a viable and powerful pathway to achieve improved electrocatalytic performances. This review presents a timely and comprehensive overview of recent advances in GB engineering for efficient electrocatalysis. The beneficial effects of introducing GBs into electrocatalysts are discussed, followed by an overview of the synthesis and characterization of GB-enriched electrocatalysts. Importantly, the latest developments in leveraging GB engineering for enhanced electrocatalysis are thoroughly examined, focusing on the electrochemical utilization cycles of carbon, hydrogen, oxygen, and nitrogen. Future research directions are proposed to further advance the understanding and application of GB engineering for improved electrocatalysis.

Autonomously self-healing, reversible, and soft adhesive microarchitectures and structured electric elements could be important features in stable and versatile bioelectronic devices adhere to complex surfaces of the human body (rough, dry, wet, and vulnerable). In this study, we propose an autonomous self-healing multi-layered adhesive patch inspired by the octopus, which possess self-healing and robust adhesion properties in dry/underwater conditions. To implement autonomously self-healing octopus-inspired architectures, a dynamic polymer reflow model based on structural and material design suggests criteria for three-dimensional patterning self-healing elastomers. In addition, self-healing multi-layered microstructures with different moduli endows efficient self-healing ability, human-friendly reversible bio-adhesion, and stable mechanical deformability. Through programmed molecular behavior of microlevel hybrid multiscale architectures, the bioinspired adhesive patch exhibited robust adhesion against rough skin surface under both dry and underwater conditions while enabling autonomous adhesion restoring performance after damaged (over 95% healing efficiency under both conditions for 24 h at 30°C). Finally, we developed a self-healing skin-mountable adhesive electronics with repeated attachment and minimal skin irritation by laminating thin gold electrodes on octopus-like structures. Based on the robust adhesion and intimate contact with skin, we successfully obtained reliable measurements during dynamic motion under dry, wet, and damaged conditions.