Category Ranking
98%
Total Visits
921
Avg Visit Duration
2 minutes
Citations
20
Article Abstract
We investigate the reassembly techniques for utilizing fine graphite particles, smaller than 5 µm, as high-efficiency, high-rate anode materials for lithium-ion batteries. Fine graphite particles of two sizes (0.4-1.2 µm and 5 µm) are utilized, and the mixing ratio of the two particles is varied to control the porosity of the assembled graphite. The packing characteristics of the assembled graphite change based on the mixing ratio of the two types of fine graphite particles, forming assembled graphite with varying porosities. The open porosity of the manufactured assembled graphite samples ranges from 0.94% to 3.55%, while the closed porosity ranges from 21.41% to 26.51%. All the assembled graphite shows improved electrochemical characteristics properties compared with anodes composed solely of fine graphite particles without granulation. The sample assembled by mixing 1.2 µm and 5 µm graphite at a 60:40 ratio exhibits the lowest total porosity (27.45%). Moreover, it exhibits a 92.3% initial Coulombic efficiency (a 4.7% improvement over fine graphite particles) and a capacity of 163.4 mAh/g at a 5C-rate (a 1.9-fold improvement over fine graphite particles).
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10650451 | PMC |
| http://dx.doi.org/10.3390/ma16216896 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Pre-ionization assisted synthesis of tailored magnesium‑aluminum bimetallic metal-organic framework-derived carbon with controlled layer spacing and porosity for performance supercapacitor and sodium-ion battery.
J Colloid Interface Sci
September 2025
State Key Laboratory of Chemical Resource Engineering, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, China. Electronic address:
Precise control of particle size, pore size distribution, and carbon layer spacing under green and low-energy conditions is critical for developing advanced carbon electrodes for supercapacitors and sodium-ion batteries (SIBs). Herein, we proposed a new strategy to prepare an MgAl bimetallic metal-organic framework (MOF) via a pre-ionization strategy, effectively avoiding harsh conditions and using organic solvents in hydrothermal synthesis. By fine-tuning the Mg/Al ratio and pyrolysis conditions, the particle size, pore size distribution and carbon layer spacing of rod porous carbon (RPC) were precisely adjusted.
View Article and Find Full Text PDFChemically modified lignin toward high-performance hard carbon anodes in sodium-ion batteries.
Int J Biol Macromol
August 2025
Guangdong Provincial Laboratory of Chemistry and Fine Chemical Engineering Jieyang Center, Jieyang 515200, China; School of Chemical Engineering and Light Industry, Guangdong University of Technology (GDUT), 100 Waihuan Xi Road, Panyu District, Guangzhou 510006, China; School of Advanced Manufacturi
Lignin, as a sustainable, oxygen-rich natural aromatic polymer, is a promising precursor for carbon electrode materials. However, the abundant aromatic rings in lignin tend to form substantial graphite-like nanodomains during the carbonization process, which hinders the formation of abundant closed pores and consequently restricts the sodium-ion storage capacity of lignin-derived hard carbons. Herein, a chemical modification strategy is proposed to modify the functional groups of lignin by grafting low bond-energy, nitrogen-containing groups (quaternary ammonium and amide groups) onto lignin molecules.
View Article and Find Full Text PDFTuning Diffusion Preferences in Silicon-Based Anodes for Enhanced Rapid and Homogeneous Lithiation.
ACS Nano
September 2025
State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Electrochemical Process and Technology, Beijing University of Chemical Technology, Beijing 100029, China.
The inherently sluggish lithiation kinetics of silicon (Si), coupled with its severe volume expansion, causes lithiation retardation and thus exacerbates the failure of Si-based anodes. Here, a Li-diffusion-preference tuning strategy for homogeneous lithiation of Si has been proposed to address these issues and successfully validated through both simulation and experiments using commercial photovoltaic silicon waste (Si). In detail, Li preferentially diffuses along grain boundaries (GBs) and then into grains, enabling rapid and homogeneous lithiation throughout the Si particles rather than the conventional outside-to-inside lithiation process that suffers from lithiation retardation.
View Article and Find Full Text PDFA mild synthesis of -ureidobenzonitrile derivatives iodide-mediated electrolysis from 2-aminobenzamides.
Org Biomol Chem
August 2025
Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, 10330 Thailand.
An efficient electrochemical synthesis of -ureidobenzonitrile derivatives from 2-aminobenzamides and isothiocyanates was developed using ammonium iodide as the electrolyte and mediator (0.5 equivalent). This iodide-mediated desulfurization-cyclization process proceeds under mild conditions in an undivided cell with graphite electrodes, delivering a broad range of products in good to excellent yields (44 examples, up to 98%).
View Article and Find Full Text PDFCopper Single-Atom Catalyst for Efficient C─S Coupling in Thioether Synthesis.
Angew Chem Int Ed Engl
August 2025
Department of Chemistry, Materials, and Chemical Engineering "Giulio Natta", Politecnico di Milano, Piazza Leonardo da Vinci 32, Milano, 20133, Italy.
Carbon-heteroatom cross-coupling reactions have become indispensable tools in synthetic chemistry. However, the formation of carbon-sulfur (C─S) bonds, which are essential for producing thioethers used in pharmaceuticals, agrochemicals, and advanced materials, remains significantly underdeveloped. Industrial C─S coupling methods still rely on expensive, homogeneous catalysts that suffer from poor recyclability and are susceptible to sulfur-induced deactivation.
View Article and Find Full Text PDF