Polyacrylonitrile/graphene (PAN/GNS) composites have been synthesized via an in situ polymerization method for the first time, which serve as a precursor to prepare cathode material high-rate rechargeable Li–S batteries. It is observed from scanning electron microscopy (SEM) and transmission (TEM) that PAN nanoparticles, less than 100 nm size, are anchored on surface of GNS this unique structure maintained sulfur composite material. The electrochemical properties pyrolyzed PAN-S/GNS...

Abstract Zinc metal is an attractive anode material for next‐generation batteries. However, dendrite growth and limited Coulombic efficiency (CE) during cycling are the major roadblocks towards widespread commercialization of batteries employing Zn anodes. In this work we report novel adoption triethyl phosphate (TEP) as a solvent co‐solvent with aqueous electrolytes to obtain highly stable dendrite‐free anode. Stable plating/stripping over 3000 h was obtained, accompanied by CE 99.68 %. SEM...

A lotus-root-like three-dimensional mesoporous silicon is successfully prepared by a magnesiothermic reduction method using SBA-15 silica as both template and precursor. After carbon coating via chemical vapor deposition process, this anode material shows high reversible capacity of ∼1900 mAh g−1 excellent rate performance even up to 15C. Detailed facts importance specialist readers are published ”Supporting Information”. Such documents peer-reviewed, but not copy-edited or typeset. They...

Dendrite and interfacial reactions have affected zinc (Zn) metal anodes for rechargeable batteries many years. Here, these obstacles are bypassed via adopting an intrinsically safe trimethyl phosphate (TMP)-based electrolyte to build a stable Zn anode. Along with cycling, pristine foil is gradually converted graphene-analogous deposit TMP surfactant molecular template. This novel anode morphology ensures long-term reversible plating/stripping performance over 5000 h, rate capability of 5 mA...

Abstract As one of the essential components in electrodes, binder affects performance a rechargeable battery. By modifying β ‐cyclodextrin ( ‐CD), an appropriate for sulfur composite cathodes is identified. Through partial oxidation reaction H 2 O solution, ‐CD successfully modified to carbonyl‐ (C‐ which exhibits water solubility ca. 100 times that at room temperature. C‐ possesses typical properties aqueous binder: strong bonding strength, high water, moderate viscosity, and wide...

Abstract A new ether-based electrolyte to match lithium metal electrode is prepared by introducing 1, 4-dioxane as co-solvent into bis(fluorosulfonyl)imide/1,2-dimethoxyethane solution. Under the synergetic effect of solvents and salt, this simple liquid presents stable Li cycling with dendrite-free deposition even at relatively high current rate, coulombic efficiency ca. 98%, good anodic stability up ~4.87 V vs RE. Its excellent performance will open a possibility for energy-density...

Of the various beyond-lithium-ion batteries, lithium-sulfur (Li-S) batteries were recently reported as possibly being closest to market. However, its theoretically high energy density makes it potentially hazardous under conditions of abuse. Therefore, addressing safety issues Li-S cells is necessary before they can be used in practical applications. Here, we report a concept build safe and highly efficient battery with flame-inhibiting electrolyte sulfur-based composite cathode. The flame...

Safety concerns pose a significant challenge for the large-scale employment of lithium-sulfur batteries. Extremely flammable conventional electrolytes and dendritic lithium deposition cause severe safety issues. Now, an intrinsic flame-retardant (IFR) electrolyte is presented consisting 1.1 m bis(fluorosulfonyl)imide in solvent mixture triethyl phosphate high flashpoint 1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoropropyl (1:3, v/v) safe (Li-S) This exhibits favorable properties reversibility...

Abstract Metallic sodium (Na) is one of the most promising anode candidates for next‐generation secondary batteries. The development Na metal batteries with a high energy density and low cost desirable to meet requirements both portable stationary electrical storage. Unfortunately, several problems caused by unstable severely hinder practical applications these Here reported facile but effective methodology form multistructural interphase layer containing fluoride‐rich solid electrolyte...

As the benchmark anode material for sodium-ion batteries, hard carbon (HC) is still confronted by unsatisfactory initial Coulombic efficiency and an unstable solid electrolyte interphase (SEI), which degrade energy density cycling performance. Herein, we demonstrate first-time application of sodium alkoxyaluminum hydride (RA) as a bifunctional presodiation reagent HC electrode. By driving homogeneous accommodation Na into electrode concurrently inducing formation passivative Al2O3 nanolayer,...

Abstract A LiFePO 4 material with ordered olivine structure is synthesized from amorphous FePO · 4H 2 O through a solid–liquid phase reaction using (NH ) SO 3 as the reducing agent, followed by thermal conversion of intermediate NH in presence LiCOOCH 2H O. Simultaneous thermogravimetric–differential analysis indicates that crystallization temperature about 437 °C. Ellipsoidal particle morphology resulting powder size mainly range 100–300 nm observed scanning electron microscopy and...

Recently, we have developed a boron based electrolyte system with outstanding electrochemical performance, formed through the reaction of tri(3,5-dimethylphenyl)borane (Mes3B) and PhMgCl in THF, for rechargeable magnesium batteries. In this paper, main components equilibria unique solutions are identified by NMR, single-crystal XRD, etc. The results prove that contain various species, such as Mg2Cl3+, MgCl+, Ph2Mg tetracoordinated anion [Mes3BPh]−. Fluorescence spectra Raman spectroscopy...

A novel pPAN-S@MWCNT core-shell composite material is prepared via in situpolymerization of acrylonitrile on the surface MWCNT, mixing with sulfur and final pyrolysis. The homogenous dispersion integration MWCNT create an electronically conductive network reinforce structural stability, leading to outstanding electrochemical performances as a cathode for rechargeable lithium/sulfur batteries.

Layer-controllable CoO and platelets were prepared by calcination of hexagonal , which was synthesized via a surfactant-free hydrothermal method. As negative electrode material for lithium-ion batteries, demonstrated high reversible capacity (more than ) excellent electrochemical cycling stability. The multilayered showed larger much better performance the monolayer nanoparticles. effect dimension morphology particles on behavior discussed.

A microporous carbon coated core/shell Si@C nanocomposite prepared by in situ polymerization exhibits a stable capacity of over 1200 mAh g(-1) with 95.6% retention even after 40 cycles, which makes it promising anode material for lithium ion batteries.

Mesoporous magnesium manganese silicate materials were prepared using mesoporous silica SBA-15 or KIT-6 as both template and silicon source. The exhibited improved electrochemical intercalation deintercalation toward Mg2+, compared with the corresponding bulk material.

Recent progress in electrolytes from the liquid to solid state for Si-based anodes is comprehensively summarized this review article.

Commercial TiO₂ in a compatible electrolyte of 0.5 mol L⁻¹ Mg(BH₄)₂/LiBH₄/TG ([LiBH₄] = 1.5 L⁻¹) delivers high specific capacity, and excellent cycling stability rate capability. This work opens up new alternative for the development rechargeable magnesium batteries.