Systematic investigation on Cadmium-incorporation in Li2FeSiO4/C cathode material for lithium-ion batteries

Abstract

Cadmium-incorporated Li2FeSiO4/C composites have been successfully synthesized by a solid-state reaction assisted with refluxing. The effect and mechanism of Cd-modification on the electrochemical performance of Li2FeSiO4/C were investigated in detail by X-ray powder diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, Raman spectra, transmission electron microscopy, positron annihilation lifetime spectroscopy and Doppler broadening spectrum, and electrochemical measurements. The results show that Cd not only exists in an amorphous state of CdO on the surface of LFS particles, but also enters into the crystal lattice of LFS. Positron annihilation lifetime spectroscopy and Doppler broadening spectrum analyses verify that Cd-incorporation increases the defect concentration and the electronic conductivity of LFS, thus improve the Li+-ion diffusion process. Furthermore, our electrochemical measurements verify that an appropriate amount of Cd-incorporation can achieve a satisfied electrochemical performance for LFS/C cathode material.

Retracted: MicroRNA‐140‐5p elevates cerebral protection of dexmedetomidine against hypoxic–ischaemic brain damage via the Wnt/β‐catenin signalling pathway

“…Wnt1 was determined as the potential target gene of miR‐140‐5p, based on the target gene prediction analysis using the TargetScan prediction algorithm (Whitehead Institute for Biomedical Research, Cambridge, MA, USA) in addition to other existing researches 19. Human target gene sequences deposited in the GenBank database (National Center for Biotechnology Information, Bethesda, Maryland, USA) were searched, and the 3′‐UTR sequence containing the potential target gene Wnt1 of miR‐140‐5p was designed according to the prediction results.…”

“…Hippocampus sections of rats in each group or of the proteins extracted from the 293FT cells were selected, followed by the addition of19 sodium dodecyl sulphate (SDS) lysate. The protein extraction was heated at 100°C for 5 minute.…”

“…2.13 | Construction of 3 0 untranslated region (UTR) reporter gene plasmid vectorWnt1 was determined as the potential target gene of miR-140-5p, based on the target gene prediction analysis using the TargetScan prediction algorithm (Whitehead Institute for Biomedical Research, Cambridge, MA, USA) in addition to other existing researches 19. UTR wild type and Wnt1-3 0 UTR mutant was constructed via one-step site-directed mutagenesis.…”

Retracted: microRNA‐129‐5p involved in the neuroprotective effect of dexmedetomidine on hypoxic‐ischemic brain injury by targeting COL3A1 through the Wnt/β‐catenin signaling pathway in neonatal rats

“…The type III procollagen gene (COL3A1) was selected as the potential target gene of the miR-140-5p according to the Target Scan software (Whitehead Institute for Biomedical Research, Cambridge, MA) and the literature before. 22 Through searching the human target gene sequences in the human Gen Bank (National Center for Biotechnology Information, Bethesda, MD) and the predicted results by the software, the 3′-untranslated region (UTR) sequences containing the COL3A1, the target gene of the miR-140-5p, were then designed. Based on the technique of the one-step site-directed mutagenesis, the wild type (WT) and mutation type (MUT) of COL3A1-3′UTR carrying reporter plasmid vector were then constructed (GUR100014-P-2, Ribobio, Guangzhou, Guangdong, China).…”

Improved Electrochemical Performance of Spherical Li2FeSiO4/C Cathode Materials via Mn Doping for Lithium-Ion Batteries

“…When the radius of alien cation is close to the substituted ions, the alien cation can provide structural support for the cathode materials during longterm cycling process, even at a high current density [37]. Up till now, there are a lot of reports about the impact of different doping cations such as Mg 2+ [38], Cd 2+ [39], Cr 3+ [40], Zn 2+ /Cu 2+ /Ni 2+ [36], V 3+ [41] and Mn 2+ [42][43][44][45] on the electrochemical performance of Li 2 FeSiO 4 cathode materials. Among the related works, Mn doping attracted more attentions as Mn 2+ can be doped well into the crystal structure of Li 2 FeSiO 4 due to its similar atomic radius with Fe 2+ [43].…”