Amine-Aldehyde Condensation-Derived N-Doped Hard Carbon Microspheres for High-Capacity and Robust Sodium Storage.

Small

State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, P. R. China.

Published: November 2023

Hard carbon is generally accepted as the choice of anode material for sodium-ion batteries. However, integrating high capacity, high initial Coulombic efficiency (ICE), and good durability in hard carbon materials remains challenging. Herein, N-doped hard carbon microspheres (NHCMs) with abundant Na adsorption sites and tunable interlayer distance are constructed based on the amine-aldehyde condensation reaction using m-phenylenediamine and formaldehyde as the precursors. The optimized NHCM-1400 with a considerable N content (4.64%) demonstrates a high ICE (87%), high reversible capacity with ideal durability (399 mAh g at 30 mA g and 98.5% retention over 120 cycles), and decent rate capability (297 mAh g at 2000 mA g ). In situ characterizations elucidate the adsorption-intercalation-filling sodium storage mechanism of NHCMs. Theoretical calculation reveals that the N-doping decreases the Na adsorption energy on hard carbon.

Download full-text PDF

Source
http://dx.doi.org/10.1002/smll.202303790DOI Listing

Publication Analysis

Top Keywords

hard carbon
20
n-doped hard
8
carbon microspheres
8
sodium storage
8
hard
5
carbon
5
amine-aldehyde condensation-derived
4
condensation-derived n-doped
4
microspheres high-capacity
4
high-capacity robust
4

Similar Publications

Investigation of carbon dioxide for scale control in reverse osmosis systems.

J Environ Manage

December 2024

Air Liquide, Brussels, Belgium. Electronic address:

The operation of a reverse osmosis (RO) system is often severely hindered by the deposition of inorganic scales such as calcium carbonate on the membrane surface. Mitigation of this scaling phenomenon requires suitable pH control strategies, with the use of strong mineral acids (e.g.

View Article and Find Full Text PDF

Rapid and reversible sodium-ion cathode materials for NASICON NaMnTiPBO achieved through Boron-substitution.

J Colloid Interface Sci

December 2024

School of Materials Science and Engineering, State Key Lab of Silicon and Advanced, Semiconductor Materials, Zhejiang University, Hangzhou 310027, PR China. Electronic address:

NaMnTi(PO) is a promising sodium-ion cathode material due to its relatively high specific capacity, excellent thermodynamic stability and low cost. However, unfavorable electron conductivity and slow kinetics limit its practical application. Here, a strategy of hetero and multivalent anion substitution is proposed to achieve high-rate performance and good capacity retention.

View Article and Find Full Text PDF

The effect of carbon fibers (Cf) and Ni nanoparticles addition on the melting point, microstructure, shear strength, indentation hardness and indentation creep of SnBi/Cu solder joints were explored. Composite solder with various Cf percentages (0, 0.02, 0.

View Article and Find Full Text PDF

Purpose: During fixed orthodontic treatment, oral hygiene is difficult to ensure and can easily lead to an imbalance in the oral micro-ecological balance. In this study, based on the adhesive properties of polydopamine (PDA) and the good antimicrobial and remineralization properties of carboxymethyl chitosan (CMC) and xylitol (Xy), new nanocomposites with both antimicrobial and remineralization capabilities were prepared to coat on orthodontic brackets.

Methods: Composite carbon dots (CDs) were synthesized using carboxymethyl chitosan and xylitol, we characterized them and the antimicrobial properties of the CMC-Xy-CDs were investigated by co-cultivation with S.

View Article and Find Full Text PDF

TiZrMoC coatings were deposited on Si(100) substrates using a DC dual magnetron sputtering. The composition was controlled by adjusting the sputtering parameters of the TiZrMo and graphite targets. The influence of graphite target current on the resulting coating properties was explored.

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!