New design for rechargeable hydrogen−chlorine battery

Mechanism of the H2−Cl2 Battery.
Image by Prof. CHEN’s team

…in wide temperature range.

A research team led by Prof. CHEN Wei from the University of Science and Technology of China (USTC) of the Chinese Academy of Science (CAS) designed a rechargeable hydrogen-chlorine (H2-Cl2) battery which can operates in a wide temperature ranging from -70 ℃ to 40 ℃. Their research was published in Journal of the American Chemical Society as the cover article on October 25th.

Hydrogen fuel cell is a promising technology nowadays for its sustainability and the abundance of hydrogen, among which H2-Cl2 fuel cells have stood out due to the fast electrochemical kinetics, high redox potential and high specific capacity of Cl2/Cl redox couple. However, the volatile chlorine gas cannot be retained during the charging process, resulting in poor Coulombic efficiency (CE) and reversibility. There is an urgent need for developing aqueous chlorine batteries with high performance and applicability at different temperatures.


Rechargeable Hydrogen–Chlorine Battery Operates in a Wide Temperature Range
Mechanism of the H2−Cl2 Battery. Image by Prof. CHEN’s team

At the early stages of the research, the team discovered that due to the lack of binding sites with strong affinity to Cl2, traditional adsorptive cathodes are difficult to immobilize Cl2, causing low reversibility. To tackle this problem, the team designed a hierarchically porous carbon cathode composed of highly micro-/mesoporous carbon (HPC) and macroporous carbon felt (CF), effectively confining the Cl2 on the cathode and improving the reversibility.

The results showed that the H2-Cl2 cells maintained a high CE and stability, operating steadily for 500 cycles at a discharge capacity of 3 mAh cm-2. Besides, the cells operate well at ultralow temperatures, maintaining a discharge plateau of 1.1 V and a high specific capacity of 282 mAh g-1 at -70 °C. To further understand the mechanism of reversibility improvement, the team combined X-ray photoelectron spectroscopy (XPS) with theoretical calculations to reveal that the Cl2/Cl reaction occurs along with the reversible formation and breakage of C-Cl bonds, which enhances the reversibility of the Cl2/Cl cathodes.

This work provides a new direction for the design of aqueous chlorine batteries and high-energy-density hydrogen batteries in a wide temperature range.

Journal: Journal of the American Chemical Society
DOI: 10.1021/jacs.3c09819
Article Title: Rechargeable Hydrogen–Chlorine Battery Operates in a Wide Temperature Range
Article Publication Date: 25-Oct-2023

Media Contact

Jane Fan
University of Science and Technology of China

Media Contact

Jane Fan
University of Science and Technology of China

All latest news from the category: Life Sciences and Chemistry

Articles and reports from the Life Sciences and chemistry area deal with applied and basic research into modern biology, chemistry and human medicine.

Valuable information can be found on a range of life sciences fields including bacteriology, biochemistry, bionics, bioinformatics, biophysics, biotechnology, genetics, geobotany, human biology, marine biology, microbiology, molecular biology, cellular biology, zoology, bioinorganic chemistry, microchemistry and environmental chemistry.

Back to home

Comments (0)

Write a comment

Newest articles

New technique can quickly detect fentanyl and other opioids

Testing method can analyze blood samples twice as quickly as other techniques. University of Waterloo researchers have developed a new blood testing method that can detect potent opioids much faster…

Photon upconversion: Steering light with supercritical coupling

Researchers from the National University of Singapore (NUS) have unveiled a novel concept termed “supercritical coupling” that enables several folds increase in photon upconversion efficiency. This discovery not only challenges…

Researchers harness 2D magnetic materials for energy-efficient computing

An MIT team precisely controlled an ultrathin magnet at room temperature, which could enable faster, more efficient processors and computer memories. Experimental computer memories and processors built from magnetic materials…

Partners & Sponsors