Lithium-ion attack on yttrium oxide in the presence of copper powder during Li plating in a super-concentrated electrolyte

When Li plating was conducted on a Cu + Y2O3 composite electrode in a super-concentrated electrolyte, a potential drop and subsequent potential plateau were observed, where Li plating occurs and Li+ attacks the Y2O3 crystals.

Late I Na Blocker GS967 Supresses Polymorphic Ventricular Tachycardia in a Transgenic Rabbit Model of Long QT Type 2

Background: Long QT syndrome has been associated with sudden cardiac death likely caused by early afterdepolarizations (EADs) and polymorphic ventricular tachycardias (PVTs). Suppressing the late sodium current (I NaL ) may counterbalance the reduced repolarization reserve in long QT syndrome and prevent EADs and PVTs. Methods: We tested the effects of the selective I NaL blocker GS967 on PVT induction in a transgenic rabbit model of long QT syndrome type 2 using intact heart optical mapping, cellular electrophysiology and confocal Ca 2+ imaging, and computer modeling. Results: GS967 reduced ventricular fibrillation induction under a rapid pacing protocol (n=7/14 hearts in control versus 1/14 hearts at 100 nmol/L) without altering action potential duration or restitution and dispersion. GS967 suppressed PVT incidences by reducing Ca 2+ -mediated EADs and focal activity during isoproterenol perfusion (at 30 nmol/L, n=7/12 and 100 nmol/L n=8/12 hearts without EADs and PVTs). Confocal Ca 2+ imaging of long QT syndrome type 2 myocytes revealed that GS967 shortened Ca 2+ transient duration via accelerating Na + /Ca 2+ exchanger (I NCX )-mediated Ca 2+ efflux from cytosol, thereby reducing EADs. Computer modeling revealed that I NaL potentiates EADs in the long QT syndrome type 2 setting through (1) providing additional depolarizing currents during action potential plateau phase, (2) increasing intracellular Na + (Na i ) that decreases the depolarizing I NCX thereby suppressing the action potential plateau and delaying the activation of slowly activating delayed rectifier K + channels (I Ks ), suggesting important roles of I NaL in regulating Na i . Conclusions: Selective I NaL blockade by GS967 prevents EADs and abolishes PVT in long QT syndrome type 2 rabbits by counterbalancing the reduced repolarization reserve and normalizing Na i . Graphic Abstract: A graphic abstract is available for this article.

Layered perovskite LiEuTiO4 as a 0.8 V lithium intercalation electrode

Lithium intercalation into LiEuTiO4 with a 0.8 V potential plateau considering both the energy density and tolerance of lithium plating.

Large-scale preparation of Mg doped LiFePO4@C for lithium ion batteries via carbon thermal reduction combined with aqueous rheological phase technology

A uniform distribution of doped metal and coated carbon in the as-prepared LiFePO4material is obtained. The LiFePO4delivers a discharge capacity of 166 mA h g−1at 0.1C and presents excellent rate capacity and a high potential plateau at 1C.

High performance LiMnPO4/C prepared by a crystallite size control method

The as-prepared LiMnPO4/C sample presents higher discharge potential plateau, larger discharge capacity, excellent high-rate capability, and good cycle stability.

Effect of Li Source on Charge/Discharge Performance of LiFePO4

LiFePO4 has been considered as the most promising positive electrode due to its low cost, high theoretical capacity, stability and low toxicity, all highly required in vehicle applications. In this work, LiFePO4 compound was synthesized by the solid carbothermic reduction reactions with different Li resource. The pure LiFePO4 phase was confirmed for all samples by analysis of the XRD results. The different morphologies were obtained due to different Li resources. The potential plateau of all samples is in the range from 3V to 4V. The sample (LiCO3 as the Li resource) has a higher discharge capacity of 118mAhg−1 at 0.2C 20% greater than that of the sample (LiOH as the Li resource). The reason comes maybe from nano pore characteristics, which reduce Li ion diffusion distance, and increase the utilization efficiency of material.