Related Experiment Video
Updated: Jul 29, 2025
10:53
Preparation of Graphene Liquid Cells for the Observation of Lithium-ion Battery Material
Published on: February 5, 2019
9.1K
Nitrogen-rich Graphite Flake from Hemp as Anode Material for High Performance Lithium-ion Batteries.
Peng-Fei Wang1, Bin-Bin Sui1, Lin Sha1
1Key Laboratory of Polymer and Catalyst Synthesis Technology of Liaoning Province, School of Environmental and Chemical Engineering, Shenyang University of Technology, Shenyang, 110870, China.
Chemistry, an Asian Journal
|May 19, 2023
Summary
Researchers developed nitrogen-rich graphite flakes (NGF) from biomass for lithium-ion batteries (LiBs). This novel anode material significantly enhances battery capacity and performance, offering a promising, eco-friendly alternative.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Biomass-derived carbon (BC) is a promising anode material for lithium-ion batteries (LiBs) due to its porous structure and ability to adsorb lithium ions.
- Pure BC often has a limited specific surface area, hindering its electrochemical performance.
- Enhancing specific surface area and nitrogen content is crucial for improving LiB anode materials.
Purpose of the Study:
- To develop a simple and effective method for producing nitrogen-rich graphite flakes (NGF) from biomass.
- To investigate the structural and electrochemical properties of NGF as an anode material for LiBs.
- To evaluate the performance enhancement of NGF compared to traditional BC in LiBs.
Main Methods:
- Biomass (hemp) was treated using ammonia and inorganic acid from urea decomposition to create NGF.
- The specific surface area and nitrogen content of NGF were characterized.
- Electrochemical performance of NGF as a LiB anode was tested, including capacity at various current densities and rate performance analysis.
- Constant current intermittent titration tests were conducted to analyze ion diffusion.
Main Results:
- NGF exhibited a high nitrogen content (10.12%) and a high specific surface area (1151.1 m²/g).
- NGF delivered a capacity of 806.6 mAh/g at 30 mA/g, double that of BC.
- Excellent rate performance was observed, with NGF retaining 429.2 mAh/g at 2000 mA/g, attributed to capacitance control.
- NGF demonstrated a higher diffusion coefficient than BC.
Conclusions:
- The urea-assisted treatment effectively produces nitrogen-rich activated carbon with enhanced properties.
- NGF shows superior electrochemical performance as a LiB anode material compared to BC.
- This method offers a simple, scalable, and commercially viable route to advanced anode materials for LiBs.
