Abstract All‐solid‐state sodium‐ion batteries that operate at room temperature are attractive candidates for use in large‐scale energy storage systems. However, materials innovation solid electrolytes is imperative to fulfill multiple requirements, including high conductivity, functional synthesis protocols achieving intimate ionic contact with active materials, and air stability. A new, highly conductive (1.1 mS cm −1 25 °C, E a =0.20 eV) dry stable sodium superionic conductor, tetragonal...

Abstract Two newly emerging materials for application in all‐solid‐state batteries, namely, single‐crystalline Ni‐rich layered oxide cathode and halide solid electrolyte (SE), are of utmost interest because their superior properties (good microstructural integrity excellent electrochemical oxidation stability, respectively) to conventional polycrystalline oxides sulfide SEs. In this work, four electrodes employing single‐ or LiNi 0.88 Co 0.11 Al 0.01 O 2 (NCA) Li 3 YCl 6 PS 5 Cl 0.5 Br...

Abstract Owing to the combined advantages of sulfide and oxide solid electrolytes (SEs), that is, mechanical sinterability excellent (electro)chemical stability, recently emerging halide SEs such as Li 3 YCl 6 are considered be a game changer for development all‐solid‐state batteries. However, use expensive central metals hinders their practical applicability. Herein, new superionic conductors reported free rare‐earth metals: hexagonal close‐packed (hcp) 2 ZrCl Fe 3+ ‐substituted , derived...

The crystal structures and electrochemical properties of ZnxMo6S8 Chevrel phases (x = 1, 2) prepared via Zn2+-ion intercalation into the Mo6S8 host material, in an aqueous electrolyte, were characterized. [trigonal, R3̅, a 9.1910(6) Å, c 10.8785(10) Z 3] was first chemical extraction Cu ions from Cu2Mo6S8, which synthesized solid-state reaction for 24 h at 1000 °C. zinc-ion insertion occurred stepwise, two separate potential regions depicted cyclic voltammogram (CV) galvanostatic profile....

Mechanically sinterable sulfide Na+ superionic conductors are key to enabling room-temperature-operable all-solid-state Na-ion batteries (ASNBs) for large-scale energy storage applications. To date, few candidates can fulfill the requirement of a high ionic conductivity ≥1 mS cm–1 using abundant, cost-effective, and nontoxic elements. Herein, development new conductor, Ca-doped cubic Na3PS4, showing maximum ∼1 at 25 °C is described. Complementary analyses measurement by AC impedance method,...

Magnesium-ion batteries (MIBs) offer improved safety, lower cost, and higher energy capacity. However, lack of cathode materials with considerable capacities in conventional nonaqueous electrolyte at ambient temperature is one the great challenges for their practical applications. Here, we present high magnesium-ion storage performance evidence electrochemical magnesiation ammonium vanadium bronze NH4V4O10 as a material MIBs. was synthesized via hydrothermal reaction. It shows reversible an...

Abstract Sulfide Na‐ion solid electrolytes (SEs) are key to enable room‐temperature operable all‐solid‐state batteries that attractive for large‐scale energy storage applications. To date, few sulfide SEs have been developed and most of the contain P suffer from poor chemical stability. Herein, discovery a new structural class tetragonal Na 4− x Sn 1− Sb S 4 (0.02 ≤ 0.33) with space group I4 1 /acd is described. The evolution phase, distinctly different SnS or 3 SbS , allows fast ionic...

Abstract All‐solid‐state sodium‐ion batteries that operate at room temperature are attractive candidates for use in large‐scale energy storage systems. However, materials innovation solid electrolytes is imperative to fulfill multiple requirements, including high conductivity, functional synthesis protocols achieving intimate ionic contact with active materials, and air stability. A new, highly conductive (1.1 mS cm −1 25 °C, E a =0.20 eV) dry stable sodium superionic conductor, tetragonal...

Magnesium-ion batteries (MIBs) suffer from a low energy density of cathode materials in conventional nonaqueous electrolyte, contrary to the expectation due divalent Mg ion. Here, we report H2V3O8, or V3O7·H2O, as high-energy material for MIBs. It exhibits reversible magnesiation–demagnesiation behavior with an initial discharge capacity 231 mAh g–1 at 60 °C, and average voltage ∼1.9 V vs Mg/Mg2+ electrolyte 0.5 M Mg(ClO4)2 acetonitrile, resulting high 440 Wh kg–1. The structural water...

Abstract Tunnel‐type sodium manganese oxide is a promising cathode material for aqueous/nonaqueous sodium‐ion batteries, however its storage mechanism not fully understood, in part due to the complicated intercalation process. In addition, low cyclability dissolution has limited practical application rechargeable batteries. Here, intricate of Na 0.44 MnO 2 revealed by combination electrochemical characterization, structure determination from powder X‐ray diffraction data, 3D bond valence...

In this study, we developed a doping technology capable of improving the electrochemical performance, including rate capability and cycling stability, P2-type Na0.67Fe0.5Mn0.5O2 as cathode material for sodium-ion batteries. Our approach involved using titanium element to partly substitute either Fe or Mn in Na0.67Fe0.5Mn0.5O2. The Ti-substituted shows superior properties compared pristine sample. We investigated changes crystal structure, surface chemistry, particle morphology caused by Ti...

Layered perovskite SrGdNixMn1–xO4±δ phases were evaluated as new ceramic anode materials for use in solid oxide fuel cells (SOFCs). Hydrogen temperature-programmed reduction (H2-TPR) analysis of the (x = 0.2, 0.5, and 0.8) revealed that significant exsolution Ni nanoparticles occurred SrGdNi0.2Mn0.8O4±δ (SGNM28) H2 at over 650 °C. Consistently, SGNM28 on LSGM electrolyte showed low electrode polarization resistance (1.79 Ω cm2) 800 Moreover, after 10 redox cycles 750 °C, area specific...

Zinc-ion batteries (ZIBs) have received attention as one type of multivalent-ion due to their potential applications in large-scale energy storage systems. Here we report a prototype rocking-chair ZIB system employing Zn2Mo6S8 (zinc Chevrel phase) an anode operating at 0.35 V, and K0.02(H2O)0.22Zn2.94[Fe(CN)6]2 (rhombohedral zinc Prussian-blue analogue) cathode 1.75 V (vs. Zn/Zn2+) ZnSO4 aqueous electrolyte. This cell has benefit its intrinsic zinc-dendrite-free nature. The is designed be...

Magnesium batteries have received attention as a type of post-lithium-ion battery because their potential advantages in cost and capacity. Among the host candidates for magnesium batteries, orthorhombic α-V2O5 is one most studied materials, it shows reversible intercalation with high capacity especially wet organic electrolyte. Studies by several groups during last two decades demonstrated that water plays some important roles getting higher Very recently, proton was evidenced mainly using...

Abstract Various types of sodium manganese oxides are promising cathode materials for storage systems. One the most considerable advantages this family is their widespread natural abundance. So far, only a few host candidates have been reported and there need to develop new with improved practical electrochemical performance. Here, P2‐type Al/F‐doped oxide as well its unique mechanism demonstrated by combination characterization, structural analyses from powder X‐ray diffraction (XRD) data,...

Highly conductive Dy and Y co-doped bismuth oxides combined with La_0.8Sr_0.2MnO_3−δsignificantly enhanced the ORR OER as oxygen electrodes for reversible SOCs.

The recent discovery of reversible plating and alloying calcium has invoked considerable interest in calcium-based rechargeable batteries toward overcoming the limitations conventional Li-ion batteries. However, only a few cathode materials have been tested thus far, these exhibit low energy-storage capability poor cyclability. Herein, highly Ca-intercalation NASICON-type NaV2(PO4)3 makes it potential material for nonaqueous Ca-ion batteries, with high capacity voltage good cyclability (90...

Calcium-ion batteries (CIBs) are gaining increasing attention due to their theoretically high capacity, owing the divalency of calcium, and low cost. However, only a few calcium insertion electrode materials reported, most them exhibit capacity or poor cyclability in nonaqueous electrolytes. Herein, we demonstrated high-performance molybdenum bronze Ca0.13MoO3·(H2O)0.41 as potential CIB cathode material at room temperature, with reversible discharge 192 mAh g–1 86 mA g–1, an average voltage...

Despite the attractive theoretical benefits of calcium-ion batteries (CIBs) as post-lithium-ion batteries, only a limited number host materials are known to reversibly intercalate calcium ions date, and their intercalation mechanism is barely understood. Herein, we report bilayered Ca0.28V2O5·H2O high-capacity CIB cathode material. It exhibits capacity 142 mA h g–1 at ∼3.0 V vs Ca/Ca2+ excellent cyclability. undergoes irreversible structural transformation two-fold superstructure during...

Entropy-stabilized titanium niobium oxides (TNOs) with crystallographic shear structures (e.g., TiNb2O7 and Ti2Nb10O29) are generally synthesized by high-temperature calcination in an air or oxygen atmosphere to compensate for their positive enthalpies of formation. In this work, we demonstrate that changing the reaction into a slightly reductive environment using situ carbonization leads creation new class TNO formula TiNbO4. Unlike its predecessors, lithium reservoir is rutile phase, most...

Sulfide inorganic materials have the potential to be used as solid electrolytes (SEs) in Li-ion all-solid-state batteries (ASSBs) owing their high ionic conductivity and mechanical softness. However, H2S gas release ambient air is a critical issue for realizing scalable production of these materials. In present study, we designed aliovalent substitutions Sb5+ Ge4+ Li4GeS4 produce series with general nominal composition Li4–xGe1–xSbxS4. With increasing Sb substitution up solubility limit (x =...