The hydrophobic internal cavity and hydrophilic external surface of cyclodextrins (CDs) render promising electrochemical applications. Here, we report a comparative mechanistic study on the use CD molecules (α-, β-, γ-CD) as electrolyte additives for rechargeable Zn batteries. addition α-CD in aqueous ZnSO4 solution reduces nucleation overpotential activation energy plating suppresses H2 generation. Computational, spectroscopic, studies reveal that preferentially adsorbs parallel via...

The developments, challenges and solutions of vanadium-based aqueous zinc ion battery cathodes are reviewed, focusing on the intrinsic connections diffusion channels, mechanisms, performances.

Metallic zinc (Zn) is an attractive anode material to use for building aqueous battery but suffers from dendritic growth and water-induced corrosion. Herein, we report the of vanillin as a bifunctional additive in electrolyte stabilize Zn electrochemistry. Computational, spectroscopic, electrochemical studies suggest that molecules preferentially absorb parallel on surface homogenize Zn2+ plating favorably coordinate with weaken solvation interaction between H2O Zn2+, resulting compact,...

Abstract Chemical doping is a powerful method to intrinsically tailor the electrochemical properties of electrode materials. Here, an interstitial boron‐doped tunnel‐type VO 2 (B) constructed via facile hydrothermal method. Various analysis techniques demonstrate that boron resides in site and such can boost zinc storage kinetics structural stability cathode during cycling. Interestingly, we found level has saturation limit peculiarity as proved by quantitative analysis. Notably, at.% shows...

Thin laminar composite solid electrolyte with high mechanical strength and ionic conductivity imparts the Li–S battery an excellent electrochemical performance.

Highly anisotropic conductive poly(ionic liquid)s-based liquid crystalline nanocomposite ionogel with superior ionic conductivity and high modulus has been successfully fabricated.

Metallic lithium is one of the most promising anode materials to build next generation electrochemical power sources such as Li-air, Li-sulfur, and solid-state batteries. The implementation rechargeable Li-based batteries plagued by issues including dendrites, pulverization, an unstable solid electrolyte interface (SEI). Herein, we report use nanostructured CuO in situ grown on commercial copper foil (CuO@Cu) via chemical etching a Li-reservoir substrate stabilize SEI formation Li...

Aqueous zinc-ion batteries have received continuous interests because of applying low-cost and eco-friendly aqueous electrolytes having high safety. Beyond energetically to explore new-type cathode materials, it is great significance regulate the zinc storage behavior existing cathodes in order understand underlying working mechanism. Therefore, as a proof concept, this work achieves regulation behaviors tunnel structure B-phase vanadium dioxide (VO2 (B)) oxide (V6 O13 ) via simple chemical...

Due to increased penetration of renewable energies, DC links and other emerging technologies, power system operation planning have cope with various uncertainties risks. In order solve the problems exceeding short circuit current multi-infeed interaction, a coordinated optimization method is presented in this paper. Firstly, branch selection strategy proposed by analyzing sensitivity relationship between limiting measures impedance matrix. Secondly, impact network structure changes on...

Fractal and self similarity of complex networks have attracted much attention in recent years. The fractal dimension is a useful method to describe the property networks. However, features mobile social (MSNs) are inadequately investigated. In this work, box-covering based on ratio excluded mass closeness centrality presented investigate feature MSNs. Using method, we find that some MSNs at different time intervals. Our simulation results indicate proposed available for analyzing

The increasing intake of wind farms in power grids calls for the accurately evaluation their voltage stability support capability to guide operation and scheduling grids. This paper proposes a method assessing static ability based on L-index, accounting operational constraints. proposed is implemented through two-layer optimization process. At system level, an problem formulated maximize margin by adjusting reactive all sources send command station. second another minimize real loss inside...

The characteristics of distributed generators (DGs) are its reactive power control capacity and fuzzy feature, which bring great effect to optimization distribution network. PV station wind turbine driven doubly-fed induction generator is considered, trapezoidal number used express feature the DGs. Taking DGs <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">\backslash</sub> operating parallel capacitors tap load regulating transformer as...

Limiting short circuit current and increasing power system stability is a contradiction. An optimization decision model for limiting considering sensitivity ranking established. Firstly, the influence on impedance matrix caused by measures analyzed, variable selection strategy relation between node self-impedance proposed. Secondly, objective functions which minimize total investment costs capacity margin are presented, an adaptive hybrid particle swarm algorithm used to find scheme set....

With the development of higher-voltage power grids, high- and low-voltage parallel loops are emerging, which lead to energy losses even threaten security stability systems. The multi-infeed high-voltage direct current (HVDC) configurations widely appearing in AC/DC interconnected systems make this situation worse. Aimed at saving system security, a decision optimization method for grid operating conditions with is proposed paper. Firstly, considering hub substation distribution structure,...

With rapid development of UHV AC and DC transmission systems, the problem parallel flows emerges in many multi-infeed HVDC receiving-end systems China. In this paper, an optimization method which coordinates stability system is present. An analytical equivalent short circuit ratio (MISCR) defined based on power flow model, considers impact control modes. factor to assess degree influence operation opening a chosen network branch MISCR. Considering factor, improved GN algorithm proposed...

With the development of higher voltage power grid, high and low parallel loops are emerging, which lead to energy losses, even threaten security stability system. The multi-infeed HVDC configurations widely appearing in AC/DC interconnected system make this situation worse. Aimed at saving security, a decision optimization method for grid operating condition with is proposed paper. Firstly, considering hub substation distribution structure, loop opening schemes generated GN algorithm. Then,...

The mathematical relationship between reactive power consumed by DC system and AC voltage on inverter bus is derived under different control modes, respectively.Based these relationships, a new definition of multi-infeed short circuit ratio (MISCR) formulated from the power-flow model PQ decoupled method.The specific influence modes stability analyzed.Considering MISCR AC/DC hybrid system, characteristics values are derived.Case study an actual regional grid validates characteristics.