Polar Vortices in Relaxor Ferroelectric Ceramics for High-Efficiency Capacitive Energy Storage.

Polar vortices are predominantly observed within the confined ferroelectric films and the ferroelectric/paraelectric superlattices. This raises the intriguing question of whether polar vortices can form within relaxor ferroelectric ceramics and subsequently contribute to their energy storage performances. Here, we incorporate 10 mol % CaSnO into the 0.

Tailoring the Whole Deposition Process from Hydrated Zn to Zn for Stable and Reversible Zn Anode.

The practical application of aqueous zinc-ion batteries (ZIBs) indeed faces challenges primarily attributed to the inherent side reactions and dendrite growth associated with the Zn anode. In the present work, N-Methylmethanesulfonamide (NMS) is introduced to optimize the transfer, desolvation, and reduction of Zn, achieving highly stable and reversible Zn plating/stripping. The NMS molecule can substitute one HO molecule in the solvation structure of hydrated Zn and be preferentially chemisorbed on the Zn surface to protect Zn anode against corrosion and hydrogen evolution reaction (HER), thereby suppressing byproducts formation.

Tuning [VO] Octahedron of Ammonium Vanadates via F Incorporation for High-Performance Aqueous Zinc Ion Batteries.

The electrochemical properties of vanadium-based materials as cathode materials for aqueous zinc ion batteries are still restricted by low conductivity, sluggish reaction kinetics, and poor structural stability. Herein, the [VO] octahedron, as the basic unit of vanadium-oxide layer of ammonium vanadates (NHVO, denoted as NVO), is incorporated by F atoms to regulate the coordinated environment of vanadium. Density functional theory (DFT) calculations and experimental results show that both physicochemical and electrochemical properties of NVO are improved by F-doping.

Superb Energy Storage Capability for NaNbO -Based Ceramics Featuring Labyrinthine Submicro-Domains with Clustered Lattice Distortions.

Designing superb dielectric capacitors is valuable but challenging since achieving simultaneously large energy-storage (ES) density and high efficiency is difficult. Herein, the synergistic effect of grain refining, bandgap widening, and domain engineering is proposed to boost comprehensive ES properties by incorporating CaTiO into 0.92NaNbO -0.

Sodium-Ion Substituted Water Molecule in Layered Vanadyl Phosphate Enhancing Electrochemical Kinetics and Stability of Zinc Ion Storage.

Vanadyl phosphate (VOPO ·2H O) has been regarded as one of the most promising cathode materials for aqueous Zn-ion batteries due to its distinct layered structure. However, VOPO ·2H O has not yet demonstrated the exceptional Zn ion storage performance owing to the structural deterioration during repeated charging/discharging process and poor intrinsic conductivity. In this work, 2D sodium vanadyl phosphate (NaVOPO ·0.

Multi-step electrodeposited Ni-Co-P@LDH nanocomposites for high-performance interdigital asymmetric micro-supercapacitors.

The development of high-performance electrode materials and the rational design of asymmetric structures are the two main keys to fabricating micro-supercapacitors (MSCs) with high energy density. Transition metal compounds, especially nickel-cobalt phosphides and hydroxides, are promising electrode materials with excellent pseudo-capacitance. However, they are rarely used in fabricating asymmetric MSCs (AMSCs) due to the limitations of the preparation method.

Potassium Ammonium Vanadate with Rich Oxygen Vacancies for Fast and Highly Stable Zn-Ion Storage.

Vanadium-based materials have been extensively studied as promising cathode materials for zinc-ion batteries because of their multiple valences and adjustable ion-diffusion channels. However, the sluggish kinetics of Zn-ion intercalation and less stable layered structure remain bottlenecks that limit their further development. The present work introduces potassium ions to partially substitute ammonium ions in ammonium vanadate, leading to a subtle shrinkage of lattice distance and the increased oxygen vacancies.

Enhanced Reversible Zinc Ion Intercalation in Deficient Ammonium Vanadate for High-Performance Aqueous Zinc-Ion Battery.

Ammonium vanadate with bronze structure (NHVO) is a promising cathode material for zinc-ion batteries due to its high specific capacity and low cost. However, the extraction of [Formula: see text] at a high voltage during charge/discharge processes leads to irreversible reaction and structure degradation. In this work, partial [Formula: see text] ions were pre-removed from NHVO through heat treatment; NHVO nanosheets were directly grown on carbon cloth through hydrothermal method.

A metal-organic framework template derived hierarchical Mo-doped LDHs@MOF-Se core-shell array electrode for supercapacitors.

Herein, we have managed to conceive and fabricate a core-shell structured triangle-like array, where a selenylation-treated MOF array was grown in situ on a conducting substrate as a highly conductive framework to support a high loading of Mo-doped nickel-cobalt LDH nanoflakes. This hierarchical electrode integrates the advantages of a defect-rich electronic state, large active area and rich reaction sites, delivering a high areal capacity of 5.16 C cm and a high rate capability.

NiCoO/NiCoP nanoflake-nanowire arrays: a homogeneous hetero-structure for high performance asymmetric hybrid supercapacitors.

Transition metal phosphides (TMPs) represent an important class of compounds with metalloid characteristics and good electrical conductivity, which are of great benefit to enhance electrochemical performances. Thus it is important to clarify the correlation between the electrochemical properties and the phosphating degree of the precursor. Herein, we report a superior electrode for battery-like capacitors based on NiCo2O4/NiCoP hetero-structure nanoflake-nanowire arrays grown on nickel foams using a one-pot facile hydrothermal approach and a controllable phosphorization treatment method.

Network structure of SnO hollow sphere/PANI nanocomposites for electrochemical performance.

Homogeneous SnO hollow spheres have been synthesized through a hydrothermal method without a template, followed by in situ polymerization of PANI. The resulting SnO hollow spheres were uniformly deposited onto the surface or embedded into the PANI nanofibers to form a SnO-PANI network structure. As electrode materials, the SnO-PANI composites exhibit greatly enhanced specific capacitance (477 F g at a current density of 1 A g) and superior cycling performance (no capacitance loss after 3000 galvanostatic charge-discharge cycles).

Open partial nephrectomy in solitary kidney with multiple renal cell carcinoma: a case report.

Renal cell carcinoma (RCC) in a solitary kidney presents a unique clinical challenge to urological surgeons. Partial nephrectomy (PN) or nephron-sparing surgery in this condition provides good oncological and renal functional outcomes with an acceptable complication rate. Long-term renal function remains stable in most patients with solitary kidneys after a reduction of more than 50% in renal mass.