Lithium metal anodes (LMA) increase the energy density of lithium-ion batteries, but the formation of lithium dendrites above a critical charging current (CCD) is still a severe safety issue that limits their wide industrial application. In this work, we present a simple, scalable method to improve the properties of LMA and increase the CCD by physical mixing with a small amount of Na metal, leading

Polyimide, endowed with high thermal resistance due to its aromatic structure, is considered a potential candidate for high-temperature polymer dielectrics. However, the strong electron delocalization in the aromatic structure causes significant leakage current during high-temperature electron transport, impairing energy storage performance. This contradictory relationship presents a bottleneck in

Self-discharge in electrochemical energy storage systems, particularly in electric double-layer capacitors, poses significant challenges due to the spontaneous dissipation of stored charges at electrode/electrolyte interfaces, which compromises device performance and energy efficiency. Despite decades of research, the underlying mechanisms of self-discharge remain a subject of debate. In this study

Solid-state sodium metal batteries (SSMBs) are considered as one of the critical technologies for safe and high-energy-density batteries. However, most SSMBs encounter poor cycling performance due to the sluggish charge transfer processes across the solid-solid interfaces. Based on a cation doping strategy, Al3+ and Zn2+ doped Na3Zr2Si2PO12 solid electrolytes (SEs) are comprehensively examined to decouple

Employing higher voltage (≥4.6 V) is an effective strategy to achieve higher energy densities in LiCoO2 based lithium-ion batteries. However, higher-voltage operation was generally followed by more severely surface to bulk structure deterioration, leading to rapid battery performance decay. Herein, a co-doping strategy involving in trace high-valence tantalum and niobium doping in LiCoO2 material was

To realize ultrafast supercapacitors, a series of ultrahigh-rate (≥1000 mV s−1) anodes that break a well-known “energy vs. power dilemma” in aqueous electrolytes have been successfully developed over the past five years. However, their matching cathodes are still limited by slow ion transport dynamics and oxidation. Here, we report a series of hydrated films that comprise small sheets of reduced graphene

Na3(VO)2(PO4)2F cathode has garnered extensive interest for its stable structure, abundant Na+ migration channels, and high working voltage, though higher energy densities are sought for commercial applications. This study enhances energy density by activating multi-electron reactions through the partial substitution of V4+ and dangling O2− with Fe3+ and F⁻, respectively, using a straightforward hydrothermal

All-solid-state batteries (ASSBs) have garnered significant interest as a potential energy storage solution, primarily because of their enhanced safety features and high energy density. Sulfide solid electrolytes have emerged as a focal point in solid-state battery research, attributed to their exceptional ionic conductivity, wide electrochemical stability range, and robust mechanical properties. However

Aqueous zinc-ion batteries (AZIBs) have garnered considerable interest due to their intrinsic safety features and high energy density. However, challenges such as the growth of Zn dendrites and the prevalence of parasitic reactions during cycling have impeded their broader application. This study introduces Silk Sericin (SS), a multifunctional natural protein, as an electrolyte additive designed to

Anode-free lithium metal batteries push the energy density higher and minimize battery production costs as low as possible. However, the fast capacity decay impedes their commercial viability, primarily due to the lack of excessive Li from the anode to compensate for the irreversible lithium loss. Thus, the Li-rich NCM cathode is a feasible way to solve the issue. In this work, to search for the ideal

Zn batteries emerge as a promising class of energy storage devices with high energy density, low cost and high safety. Nonaqueous Zn electrolytes offer high interfacial stability yet suffer from sluggish interfacial charge transfer kinetics. Here, we report an eccentric Zn2+ solvation structure enabled by metal-organic polyhedrons (MOPs) in nonaqueous colloidal electrolytes, which facilitates charge

Carbonate electrolytes are the primary determinant for the development of low-temperate lithium metal batteries (LT-LMBs). However, conventional ethyl carbonate (EC)-based electrolytes with solvent-dominated solvation configuration suffer from sluggish reaction kinetics, severe interfacial side reactions and high Li+ desolvation energy under low temperature. Herein, an EC-free and weakly solvated electrolyte

Fluor-lithium salts have been found for the serious aluminum collector corrosion in lithium-ion batteries. Herein, we unexpectedly observe that adding 10 wt% fluor-lithium salts into Ni-rich cathode can lead to irreversible decay of the initial discharge capacity. The capacity loss is related to the surface phase corrosion of Ni-rich cathode materials, where the local nickel ions work as catalytic

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Developing nonaqueous electrolytes for zinc-ion batteries (ZIBs) is increasingly considered a promising solution to address the crucial issues associated with aqueous electrolytes, including hydrogen evolution, side reactions, and dendritic growth. However, most organic solvents tend to form a double-toothed or multi-toothed Zn-O strong coordination structure with Zn2+ through the donor O atom, which

Rechargeable aqueous zinc-ion batteries (AZIBs) have emerged as promising candidates for sustainable energy storage systems, due to their low cost, enhanced safety, and high-power density. Nevertheless, practical applications are still hampered by inherent challenges related to the zinc (Zn) foil anode, including dendrite formation and interfacial parasitic reactions. As an alternative, Zn powder (Zn-p)

Hydrated eutectic electrolytes (HEEs) hold promise as green, safe and affordable electrolytes for high-voltage electrochemical energy storage. The water molecules in HEEs participate in the solvation structure of cations, which is critical to the electrolyte performance. We hereby report HEEs consisting of NaClO4, N-methyl acetamide (NMAc) and water. By adjusting the ratio of the ingredients, the optimized

To enable a shift from fossil fuels to renewable and sustainable transport, batteries must allow fast charging and exhibit extended lifetimes—objectives that traditionally conflict. Current charging technologies often compromise one attribute for the other, leading to either inconvenience or diminished resource efficiency in battery-powered vehicles. For lithium-ion batteries, the way to meet both

Magnesium-based batteries have emerged as highly promising candidates among post-lithium-ion battery systems due to their high energy density, abundant resources, cost-effectiveness, and high safety. Although there exist some reviews summarizing and discussing advancements in battery materials, a comprehensive review that delves into the understanding of reaction mechanisms and the screening of promising

The interface reaction that occurs between electrodes and electrolyte is a significant factor to the degradation of batteries' electrochemical performance. One crucial avenue to enhance the electrochemical performance of sodium metal batteries (SMBs) is to construct robust inorganic-rich interphases that can effectively inhibit interface side reactions. Herein, we report and demonstrate a collaborative

Dielectric polymers with capacitive energy storage capabilities are essential for advanced electronics and electrical systems. However, a persistent challenge lies in enhancing their energy density at elevated temperatures. Despite the exploration of high-glass transition temperature (Tg) polymers with superior dielectric-thermal stability, they face limitations in terms of low dielectric constant

The exceptional cycling stability of lithium-ion batteries in electric vehicles and large-scale grid energy storage applications necessitates the use of accelerated aging tests for rapid assessment. Overdischarge stress is an effective approach to accelerate battery aging, whereas its impact on solid electrolyte interphase (SEI) and battery aging performance remains elusive. Herein, the whole picture