The dramatic 50% improvement in energy density that Li-metal anodes offer comparison to graphite conventional lithium (Li)-ion batteries cannot be realized with current cell designs because of failure after a few cycles. Often, is caused by Li dendrites grow through the separator, leading short circuits. Here, we used new characterization technique, cryogenic femtosecond laser cross sectioning and subsequent scanning electron microscopy, observe electroplated morphology accompanying solid...

Single-ion-conducting polymer electrolytes are attractive to use in lithium batteries as the transference number of cation approaches unity. This helps prevent concentration gradients across electrolyte, which can result dendrite formation. The addition ceramic particles at high loadings increase mechanical strength polymer, also help suppress Here, a single-ion-conducting electrolyte is blended with lithium-conducting oxide make composite electrolyte. studied comparison containing freely...

Lithium-metal anodes can theoretically enable 10× higher gravimetric capacity than conventional graphite anodes. However, Li-metal anode cycling has proven difficult due to porous and dendritic morphologies, extensive parasitic solid electrolyte interphase reactions, formation of dead Li. We systematically investigate the effects applied interfacial pressure on performance morphology in recently developed highly efficient 4 M lithium bis(fluorosulfonyl)imide 1,2-dimethoxyethane electrolyte....

Solvent-free, single-ion conducting electrolytes are sought after for use in electrochemical energy storage devices. Here, we investigate the ionic conductivity and how this property is influenced by segmental mobility ion number crosslinked polyether-based with varying tethered anion counter-cation types. Crosslinked prepared polymerization of poly(ethylene glycol) diacrylate (PEGDA), methyl ether acrylate, monomers. The measured interpreted context differential scanning calorimetry Raman...

Magnesium batteries are a promising alternative to lithium-ion due the widespread abundance of magnesium and its high specific volumetric energy capacity. Ethereal solvents such as tetrahydrofuran (THF) commonly used for magnesium-ion electrolytes their chemical compatibility with metal, but volatile nature THF is concern practical application. Herein, we investigate bis(hexamethyldisilazide) plus aluminum chloride (Mg(HMDS)2-AlCl3) in THF, diglyme, tetraglyme at varying temperature. We find...

Cross-linked ionomer networks of varying poly(ethylene glycol) diacrylate cross-linker chain length, ionic comonomer chemistry, and ratio have been studied for their use as polysulfide shuttle inhibiting separators in magnesium–sulfur (Mg–S) batteries. Through the X-ray scattering, diffusion experiments, conductivity measurements, Mg–S cell cycling, it was determined that inclusion tethered anions polymer mitigates effect. Polysulfide crossover through into a bulk electrolyte can be reduced...

FeF3 conversion cathodes, paired with Li metal, are promising for use in next-generation secondary batteries and offer a remarkable theoretical energy density of 1947 Wh kg-1 compared to 690 LiNi0.5 Mn1.5 O4 ; however, many successful studies on cathodes performed cells large (>90-fold) excess that disguises the effects tested variables anode decreases practical battery. Herein, it is demonstrated full-cell compatibility, electrolyte must produce both protective solid-electrolyte interphase...

Battery interfaces help govern rate capability, safety/stability, cycle life, and self-discharge, but significant gaps remain in our understanding at atomic length scales that can be exploited to improve interfacial properties. In particular, Li partially plated on copper current collectors, relevant the anodeless, lithium metal cell which is a holy grail of high density energy battery research, has recently been reported undergo galvanic corrosion exhibit short shelf lives. We apply large...

The development of polymer electrolytes for magnesium batteries has been hindered by difficulties related to achieving sufficient ion conduction and electrodeposition. high charge density the cation causes it interact with both polar matrix any counteranions, challenging transport. Solvents salts that are known be incompatible electrode have widely used in prior reports increase ionic conductivity. Herein we report use a single-ion conducting gel electrolyte consisting poly(ethylene glycol)...

Lithium metal is considered the "holy grail" material to replace typical Li-ion anodes due absence of a host structure coupled with high theoretical capacity. The results in large volumetric changes when lithium electrodeposited/dissolved, making prone stranding and parasitic reactions electrolyte. research focused on enabling highly reversible electrodeposition/dissolution, which important achieving long cycle life. Understanding various mechanisms self-discharge also critical for realizing...

In this work we compare the effects of Li⁺ conducting ceramic fillers in a gel composite electrolyte vs dry electrolyte. The strategy to effectively utilize achieve synergy electrolytes is discussed.

Li metal anodes are enticing for batteries due to high theoretical charge storage capacity, but commercialization is plagued by dendritic growth and short circuits when cycled at currents. Applied pressure has been suggested improve morphology, therefore performance. We hypothesized that increasing would suppress To test this hypothesis, here, we extensively use cryogenic scanning electron microscopy show varying the applied from 0.01 1 MPa little impact on morphology after one deposition....

One of the limiting factors in development magnesium batteries is reversibility electrodeposition and dissolution at anode. Often irreversibility related to impurities decomposition. Herein we report on cycling behavior metal anodes different electrolytes, Mg(HMDS)2 – 4 MgCl2 tetrahydrofuran (THF) a butyl sulfone/THF mixture. The deposition morphology anode-electrolyte interface studied Mg/Mg cell performance. It found that adding sulfone caused formation boundary layer electrode-electrolyte...

Rechargeable magnesium sulfur (Mg/S) batteries suffer from fast capacity fading, because of the difficulty with reoxidation MgS and polysulfide shuttle. Other works have reported that use Cu current collectors at cathode improves cyclability. Here, we investigate nanoparticles grown on carbon nanofibers (Cu@CNF) as an additive for Mg/S battery to test effects metal rate performance controlled loading. The additives can operate 1 C a 452 mAh/g after 100 cycles. It was confirmed via X-ray...

ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTConditioning-Free Electrolytes for Magnesium Batteries Using Sufone–Ether Mixtures with Increased Thermal StabilityLaura C. MerrillLaura MerrillDepartment of Chemical and Biomolecular Engineering, University Notre Dame, 205 McCourtney Hall, Indiana 46556, United StatesMore by Laura Merrill Jennifer L. Schaefer*Jennifer SchaeferDepartment States*J. Schaefer. E-mail: [email protected], Tel: 15746315114.More...

Chemically resolved NMR spectroscopy is demonstrated on coin cell batteries with metal casings for the first time.

Recurrent hydatidiform moles is an uncommon occurrence. Over the past decade, genetic studies of women with multiple recurrent molar pregnancies have revealed that maternal mutations in two different genes, NLRP7 and C6orf221, result moles. We report a 23 year old woman, born unrelated parents, who has experienced three succession. Whilst first pregnancy was classified as complete mole, second third defied classification or partial mole using conventional histology, p57 nuclear staining...

Artificial solid electrolyte interphases have provided a path to improved cycle life for high energy density, next-generation anodes like lithium metal. Although long is necessary widespread implementation, understanding and mitigating the effects of aging self-discharge are also required. Here, we investigate several coating materials their role in calendar lithium. We find that oxide coatings electronically passivating whereas LiF slows charge transfer kinetics. Furthermore, Coulombic loss...