The single‐phase, cubic‐perovskite region of the LaO 1.5 ‐SrO‐Gao ‐MgO phase diagram was determined from room‐temperature and high‐temperature X‐ray diffraction. Two impurity phases were identified, LaSrGaO 4 aSrGa 3 O 7 . conductivity oxygen‐deficient perovskite shown to be essentially a purely oxide‐ion sigma o over wide range oxygen partial pressures 10 ‐22 lessthan equal P 2 1 atm. highest values = 0.17 0.08 S/cm found for La 0.8 Sr 0.2 Ga 0.83 Mg 0.2815 at 800° 700°C, respectively; they...

SnS nanoparticles (SnS NPs) electrostatically anchored on a 3D N-doped graphene (3DNG) network exhibit the best cycling performance reported so far for SnS-based anodes.

Sodium ion batteries (SIBs) are a promising alternative to lithium for broader range of energy storage applications in the future. However, development high‐performance anode materials is bottleneck SIBs advancement. In this work, Sb 2 Se 3 nanorods uniformly wrapped by reduced graphene oxide (rGO) as material reported. The results show that such /rGO hybrid yields high reversible mass‐specific capacity 682, 448, and 386 mAh g −1 at rate 0.1, 1.0, 2.0 A , respectively, sustains least 500...

Here we report chemically-exfoliated V₅S₈ and graphite hybrid nanosheets (ce-V₅S₈–C) as a novel anode material for sodium-ion batteries (SIBs).

Abstract Rechargeable aqueous batteries with Zn 2+ as a working‐ion are promising candidates for grid‐scale energy storage because of their intrinsic safety, low‐cost, and high energy‐intensity. However, suitable cathode materials excellent ‐storage cyclability must be found in order Zinc‐ion (ZIBs) to find practical applications. Herein, NaCa 0.6 V 6 O 16 ·3H 2 (NaCaVO) barnesite nanobelts reported an ultra‐stable ZIB material. The original capacity reaches 347 mAh g −1 at 0.1 A , the...

Developing high capacity and stable cathodes is a key to successful commercialization of aqueous Zn-ion batteries (ZIBs). Pure layered V2 O5 has theoretical (585 mAh g-1 ), but it suffers severe decay. Pre-inserting cations into can substantially stabilize the performance, at an expense lowered capacity. Here we show that atomic layer deposition derived be excellent ZIB cathode with exceptional cycle stability once. We report rapid in situ on-site transformation layers Zn3 O7 (OH)2 ⋅2 H2 O...

Abstract Heterostructuring electrodes with multiple electroactive and inactive supporting components to simultaneously satisfy electrochemical structural requirements has recently been identified as a viable pathway achieve high‐capacity durable sodium‐ion batteries (SIBs). Here, new design of heterostructured SIB anode is reported consisting double metal‐sulfide (SnCo)S 2 nanocubes interlaced 2D sulfur‐doped graphene (SG) nanosheets. The /SG exhibit an excellent rate capability (469 mAh g...

Aqueous Zn-ion batteries (ZIBs) are promising candidates for grid-scale energy storage because they intrinsically safe, cost competitive, and intense. However, the development of ZIBs is currently challenged by performance cathode materials. Herein, we report on Ca0.67V8O20·3.5H2O (CaVO) nanobelts as a type ZIB with discharge capacity 466 mAh g-1 (equivalent to an density 345.6 Wh kg-1) at 0.1 A retention rate 100%, 95%, 74% 5.0 500, 1000, 2000 cycles, respectively. Through combined...

Structural water in bilayer V₂O₅·<italic>n</italic>H₂O could affect the Zn ions intercalation and rebuild a smooth electrostatic environment between V₂O₅ sheets for fast diffusion.

Vanadium oxides are a promising class of cathode materials for rechargeable aqueous zinc-ion batteries (ZIBs). However, the intrinsically low electrical conductivity and unstable structure vanadium often lead to fast performance degradation. In this work, we report on potassium-rich preintercalated oxide (K1.1V3O8) as high-performance material ZIBs. The K1.1V3O8 exhibits high specific capacity 386 mAh g–1 at 0.1 A good long-term cycling stability with retention 114.9% (180.7 g–1) after 10...

Potassium-ion batteries (KIBs) have gained significant interest in recent years from the battery research community because potassium is an earth-abundant and redox-active metal, thus having potential to replace lithium-ion for sustainable energy storage. However, current development of KIBs critically challenged by lack competitive electrode materials that can reversibly store large amounts K+ electrolyte systems are compatible with materials. Here, we report cobalt monochalcogenide (CoSe)...

Anhydrous α-V2O5 was the first class of cathodes studied for rechargeable aqueous zinc-ion batteries (AZIBs), mainly due to its layered structure and high theoretical capacity. However, poor cycle life Zn/α-V2O5 prevents it from being used as a practical cathode. A critical need advancement high-capacity is better understanding degradation mechanisms in an Through combined experimental approach, we here report that stability cathode fundamentally controlled by dissolution water concurrent...

Abstract Transition metal doped LiNiO 2 layered compounds have attracted significant interest as cathode materials for lithium‐ion batteries (LIBs) in recent years due to their high energy density. However, a critical issue of ‐based cathodes is caused particularly at highly delithiated state by irreversible phase transition, initiation/propagation cracks, and extensive reactions with electrolyte. Herein, tungsten boride (WB)‐doped single‐crystalline LiNi 0.83 Co 0.07 Mn 0.1 O (SNCM)...

Abstract Nickel‐rich layered oxides are a class of promising cathodes for high‐energy‐density lithium‐ion batteries (LIBs). However, their structural instability derived from crystallographic planar gliding and microcracking under high voltages has significantly hindered practical applications. Herein, resurfacing engineering single‐crystalline LiNi 0.83 Co 0.07 Mn 0.1 O 2 (SNCM) cathode is undertaken. A passivation shell, comprising surface fast ion conductor Li 1.25 Al 0.25 Ti 1.5 4 (LATO)...

An improved cathode material for a solid‐oxide fuel cell would be mixed electronic and oxide‐ion conductor with good catalytic activity oxygen reduction at an operating temperature Top ≥ 700°C thermal expansion matched to that of the electrolyte interconnect. We report on properties Sr‐ Ni‐doped perovskites meet these criteria. Single‐phase regions were determined by X‐ray diffraction, thermogravimetric analysis measurements used obtain temperatures above which loss, hence conductivity,...

Uniform spherical powders of Ce 0.9 Gd 0.1 O 1.95 with an average diameter 250 nm were obtained at 700°C from a sol‐gel process mixing nitrates and ethylene glycol. Broadening the X‐ray peaks fluorite structure reveals small crystallite size within powders. Sintering in air pressed pellets 1585°C gives ceramics 99% theoretical density grain sizes 1‐10 µm cubic unit cell = 5.422 ± 0.034 Å. The electrical conductivity σ=σ o +σ e has two components. In or argon, electronic component σ is...

Chemical reactions between the superior perovskite oxide-ion conductor Sr- and Mg-doped (LSGM), NiO have been studied by powder X-ray diffraction. The results showed that an extensive reactivity occurs as a result of La migration driven gradient chemical activity. across LSGM/electrode interfaces in fuel cell leads to formation resistive phases at interface, either or Use 40 mol % -doped interlayer anode electrolyte well NiO-containing prevents all found. Consequently, air- maximum power...

Sr‐ and Mg‐doped LaGaO 3 powders were prepared from a salt acetate solution. The stable solution was peptized by reacting ammonium hydroxide with the precursor Thermal analysis (DTA/TGA) used to characterize first dehydration then thermal decomposition of organic ligands dried gel. transformation amorphous into crystallized, homogeneous oxide phase corresponds two endothermic peaks in DTA curve; one at 150°C is related removal water followed shoulder 250°C. second peak 300°C superposition...

We demonstrate that the highly active but unstable nanostructured intermediate-temperature solid oxide fuel cell cathode, La0.6Sr0.4CoO3-δ (LSCo), can retain its high oxygen reduction reaction (ORR) activity with exceptional stability for 4000 h at 700 °C by overcoating surfaces a conformal layer of nanoscale ZrO2 films through atomic deposition (ALD). The benefits from presence ALD-ZrO2 overcoats are remarkable: factor 19 and 18 in polarization area-specific resistance degradation rate over...

In this work we report proof-of-concept of a novel redox flow battery consisting solid oxide electrochemical cell (SOEC) integrated with redox-cycle unit. The charge/discharge characteristics were explicitly observed by operating between fuel and electrolysis modes the SOEC along "in-battery" generation storage H2 realized an in situ closed-loop reversible steam-metal reaction With Fe/FeO as materials, new can produce energy capacity 348 Wh/kg-Fe round-trip efficiency 91.5% over twenty...