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Calcination-Free Synthesis of Well-Dispersed and Sub-10 nm Spinel Ferrite Nanoparticles as High-Performance Anode Materials for Lithium-Ion Batteries: A Case Study of CoFe2O4
In this study, a low temperature aminolytic route was designed to synthesize sub-10 nm CoFe 2 O 4 nanoparticles with good dispersion through carefully exploiting the reaction of acetates and oleylamine. The performance of CoFe 2 O 4 nanoparticles obtained by traditional co-precipitation method was also investigated for comparison. This work demonstrates that CoFe 2 O 4 nanoparticles synthesized by the aminolytic route are promising as anode materials for LIBs. Besides, this method can be extended to design other spinel ferrites for energy storage devices with superior performance by simply changing the starting material, s...
Source: Chemistry - June 28, 2021 Category: Chemistry Authors: Yifan Zhang Yamin Zhang Yi Cao Minghao Xie Jiabao Li Alex Balzer Nian Liu Z John Zhang Source Type: research

Atom probe specimen preparation methods for nanoparticles
Ultramicroscopy. 2021 Nov 5;233:113420. doi: 10.1016/j.ultramic.2021.113420. Online ahead of print.ABSTRACTRevealing the position of materials with chemical selectivity at atomic scale within functional nanoparticles is essential to understand and control their performance and cutting-edge atom probe tomography is a powerful tool to undertake this task. In this paper, we demonstrate three effective methods to prepare the needle-shaped specimens required for atom probe tomography measurements from nanoparticles of different sizes and provide examples of how atom probe can be used to provide data that is critical to their fu...
Source: Ultramicroscopy - November 14, 2021 Category: Laboratory Medicine Authors: Jiangtao Qu Wenjie Yang Tianhao Wu Wenhao Ren Jun Huang Haijun Yu Chuan Zhao Matthew J Griffith Rongkun Zheng Simon P Ringer Julie M Cairney Source Type: research

Lithiumpyridinyl ‐Driven Synthesis of High‐Purity Zero‐Valent Iron Nanoparticles and Their Use in Follow‐Up Reactions
Zero ‐valent iron nanoparticles are obtained by novel lithium ‐pyridinyl‐driven reduction of FeCl3 in pyridine. The Fe(0) nanoparticles are characterized by high purity, small size (3 –4 nm), and high reactivity. Direct follow‐up reactions to iron compounds such as Fe3C nanoparticles, FeS nanoparticles, or FeCp*2 is possible. AbstractThe synthesis of zero ‐valent iron (Fe(0)) nanoparticles in pyridine using lithium bipyridinyl ([LiBipy]) or lithium pyridinyl ([LiPy]) is presented. FeCl3 is used as the most simple starting material and reduced either in a [LiBipy] ‐driven two‐step approach or in a [LiPy]‐d...
Source: Small - July 21, 2019 Category: Nanotechnology Authors: Alexander Egeberg, Theresa Block, Oliver Janka, Olivia Wenzel, Dagmar Gerthsen, Rainer P öttgen, Claus Feldmann Tags: Full Paper Source Type: research

Room-temperature liquid-phase synthesis of aluminium nanoparticles
Chem Commun (Camb). 2022 May 23. doi: 10.1039/d2cc01846b. Online ahead of print.ABSTRACTAluminium nanoparticles, Al(0), are obtained via liquid-phase synthesis at 25 °C. Accordingly, AlBr3 is reduced by lithium naphthalenide ([LiNaph]) in toluene in the presence of N,N,N',N'-tetramethylethylenediamine (TMEDA). The Al(0) nanoparticles are small (5.6 ± 1.5 nm) and highly crystalline. A light yellow colour and absorption at 250-350 nm are related to the plasmon-resonance absorption. Due to TMEDA functionalization, the Al(0) nanoparticles are colloidally and chemically stable, but show high reactivity after TMEDA removal.PMI...
Source: Chemical Communications - May 23, 2022 Category: Chemistry Authors: Sven Riegsinger Radian Popescu Dagmar Gerthsen Claus Feldmann Source Type: research

Graphene Enabled Electric-Field Regulation and Ionic Redistribution Around Lithiophilic Aurum Nanoparticles Toward a Dendrite-Free and 2000-Cycle-Life Lithium Metal Battery
Chemistry. 2022 Jun 13. doi: 10.1002/chem.202201151. Online ahead of print.ABSTRACTLithium metal batteries (LMBs) have attracted extensive attention owing to their high theoretical capacity. However, the uncontrolled volume changes and serious Li dendrites growth of Li metal anode have hindered their commercialization. Herein, a three-dimensional Cu foam decorated with Au nanoparticles and conformal graphene layer was designed to tune the Li plating/stripping behaviors by electroless deposition and chemical vapor deposition. The 3D-Cu conductive hosts anchored by lithiophilic Au nanoparticles can effectively alleviate the ...
Source: Chemistry - June 13, 2022 Category: Chemistry Authors: Jianping Yan Minghui Ye Yufei Zhang Yongchao Tang Xiaoqing Liu Chengchao Li Source Type: research

Ceramic composite separator with integrated moisturized ZrO2 nanoparticles for securing electrochemical and thermal stabilities of lithium ion batteries
Phys. Chem. Chem. Phys., 2014, Accepted ManuscriptDOI: 10.1039/C4CP00624K, PaperKi Jae Kim, Hyuk Kwon Kwon, Min-Sik Park, Taeeun Yim, Ji-Sang Yu, Young-Jun KimWe introduce a ceramic composite separator prepared by coating moisturized ZrO2 nanoparticles with a poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-12wt%HFP) copolymer on a polyethylene separator. The effect of moisturized ZrO2 nanoparticles on the...The content of this RSS Feed (c) The Royal Society of Chemistry
Source: RSC - Phys. Chem. Chem. Phys. latest articles - March 24, 2014 Category: Chemistry Authors: Ki Jae Kim Source Type: research

Ceramic composite separators coated with moisturized ZrO2 nanoparticles for improving the electrochemical performance and thermal stability of lithium ion batteries
Phys. Chem. Chem. Phys., 2014, Advance ArticleDOI: 10.1039/C4CP00624K, PaperKi Jae Kim, Hyuk Kwon Kwon, Min-Sik Park, Taeeun Yim, Ji-Sang Yu, Young-Jun KimMicropore formation around the ZrO2 nanoparticles is caused by the moisture adsorbed on the surface of nanoparticles. This significantly affects the physicochemical properties of the composite separators.To cite this article before page numbers are assigned, use the DOI form of citation above.The content of this RSS Feed (c) The Royal Society of Chemistry
Source: RSC - Phys. Chem. Chem. Phys. latest articles - April 10, 2014 Category: Chemistry Authors: Ki Jae Kim Source Type: research

LiFePO4 Nanoparticles Encapsulated in Graphene Nanoshells for High-Performance Lithium-Ion Battery Cathodes
Chem. Commun., 2014, Accepted ManuscriptDOI: 10.1039/C4CC02123A, CommunicationHuilong Fei, Zhiwei Peng, Yang Yang, Lei Li, Abdul-Rahman O Raji, Errol L Samuel, James M TourLiFePO4 encapsulated in graphene nanoshells (LiFePO4@GNS) nanoparticles were synthesized by solid state reaction between graphene-coated Fe nanoparticles and LiH2PO4. The resulting nanocomposite was demonstrated to be a superior lithium-ion battery...The content of this RSS Feed (c) The Royal Society of Chemistry
Source: RSC - Chem. Commun. latest articles - May 19, 2014 Category: Chemistry Authors: Huilong Fei Source Type: research

Synthesis of Lithium Iron Phosphate/Carbon Microspheres by Using Polyacrylic Acid Coated Iron Phosphate Nanoparticles Derived from Iron(III) Acrylate.
Abstract Lithium iron phosphate/carbon (LiFePO4 /C) microspheres with high rate and cycling performance are synthesized from iron phosphate/polyacrylic acid (FePO4 /PAA) nanoparticles. Iron(III) acrylate is used as a precursor for both the iron and carbon sources. FePO4 nanoparticles are first produced by a coprecipitation reaction. The byproduct, acrylic acid ions, is polymerized in situ to form a uniform PAA layer on the surface of the FePO4 nanoparticles. The as-prepared LiFePO4 /C microspheres are composed of primary nanoparticles with sizes of 40-50 nm. The nanoparticles are fully coated with a thin, unif...
Source: ChemSusChem - December 2, 2014 Category: Chemistry Authors: Xu D, He YB, Chu X, Ding Z, Li B, He J, Du H, Qin X, Kang F Tags: ChemSusChem Source Type: research