Related Experiment Video
Updated: Jul 11, 2025
From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
Published on: March 24, 2018
Reversible Insertion of [AlCl4 ]- Superhalides in Graphite
Jiajin Zhao1, Chenxi Zhao1, Chengyu Zou1
1School of Environmental and Chemical Engineering, Hebei Key Laboratory of Applied Chemistry, Yanshan University, Qinhuangdao, 066004, P. R. China.
This study demonstrates reversible Al-Cl superhalide insertion into expanded graphite (EG) using an aqueous deep eutectic solvent (DES) gel electrolyte. This breakthrough achieves ultrahigh specific capacity for advanced energy storage systems.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Graphite-based dual-ion batteries offer high energy density potential.
- Anion insertion into graphite in aqueous environments presents a significant challenge for battery development.
Purpose of the Study:
- To investigate the reversible insertion of Al-Cl superhalide into expanded graphite (EG) within an aqueous deep eutectic solvent (DES) gel electrolyte.
- To achieve high specific capacity in graphite-based energy storage systems.
Main Methods:
- Utilized an aqueous DES gel electrolyte composed of 50 m ChCl + 5 m AlCl3.
- Employed high-resolution transmission electron microscopy (HRTEM), Raman spectroscopy, and X-ray diffraction (XRD) for structural analysis.
Main Results:
- Achieved an ultrahigh specific capacity of approximately 171 mAh/g.
- Observed the generation of a turbostratic graphite structure during Al-Cl superhalide (de)insertion.
- Demonstrated reversible Al-Cl superhalide insertion and extraction.
Conclusions:
- The formation of a turbostratic structure, rather than typical graphite intercalation compounds (GICs), is responsible for the high capacity.
- This work presents a novel approach for anion insertion in aqueous electrolytes, paving the way for high-performance energy storage devices.
More Related Videos
![The Synthesis of [Sn10SiSiMe334]2- Using a Metastable SnI Halide Solution Synthesized via a Co-condensation Technique](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F54498.jpg&w=3840&q=50)
12:43The Synthesis of [Sn10SiSiMe334]2- Using a Metastable SnI Halide Solution Synthesized via a Co-condensation Technique
Published on: November 28, 2016
11:42Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities
Published on: July 24, 2015
Related Concept Videos
02:35Electrophilic Addition to Alkynes: Hydrohalogenation
01:31Radical Substitution: Allylic Chlorination
02:46Halogenation of Alkenes
Consider the bromination of cyclopentene. Molecular bromine is polarized in the proximity of the π electrons of cyclopentene. An electrophilic bromine atom adds across the double bond, forming a cyclic bromonium ion intermediate.
01:19Acid Halides to Alcohols: LiAlH4 Reduction
The mechanism proceeds in three steps. First, the nucleophilic hydride ion attacks the carbonyl carbon of the acid halide to form a tetrahedral intermediate. Next, the carbonyl group is re-formed, and the halide ion departs as a leaving group, generating an aldehyde. A second nucleophilic attack by the hydride yields an alkoxide ion, which, upon protonation, gives a primary alcohol as...
01:27Radical Substitution: Halogenation of Alkanes and Alkyl Substituents
In the initiation step of the reaction, the chlorine molecule undergoes homolytic cleavage in the presence of light or heat, forming two highly reactive chlorine radicals. Propagation occurs in two...
01:15Acid Halides to Alcohols: Grignard Reaction
Grignard reagents are a source of carbanions and function as nucleophiles. The mechanism begins with the nucleophilic attack by the carbanion at the carbonyl carbon of the acid halide to form a tetrahedral intermediate. Next, the carbonyl group is re-formed, and the halide ion departs,...