Sector News

Batteries without critical raw materials

October 30, 2022
Chemical Value Chain

The market for rechargeable batteries is growing rapidly, but the necessary raw materials are limited. Sodium-ion batteries, for example, could offer an alternative. A joint research group from HZB and Humboldt-Universität zu Berlin has investigated new combinations of electrolyte solutions and electrode materials for this purpose.

“In contrast to lithium-ion batteries, which are based on the storage of lithium ions in the positive and negative electrodes of the battery, we are working on the one hand with sodium ions, as they also occur in cheap table salt. On the other hand, we store the sodium ions together with their solvate shell, i.e. solvent molecules from the electrolyte solution that separate the two electrodes. This makes it possible to realise completely new storage reactions,” explains Prof. Philipp Adelhelm, who heads the research group “operando battery analysis”, which was jointly founded by Humboldt University and Helmholtz-Zentrum Berlin in 2020.

The storage of ions when accompanied by their solvation shell in a crystal lattice is referred to as co-intercalation. Up to this point, this concept was limited to the negative electrode of the sodium-ion battery. Now the researchers around Adelhelm have succeeded in extending the concept to the positive electrode of the battery. Dr. Guillermo A. Ferrero, first author of the publication, explains: “With titanium disulphide and graphite, we have for the first time combined two materials that absorb and release the same solvent during charging and discharging of the battery”. The scientists could observe changes in the material during charging and discharging via operando measurements performed in the X-Ray Core Lab at HZB on the LIMAX 160. This helped them to assign the co-intercalation mechanism inside the battery. They could then use this new knowledge to realise a battery with two electrodes that both rely on reversible co-intercalation of solvent molecules.

“We are still in the early stages of understanding the implications of the co-intercalation batteries. But there are a few possible advantages we can envision”, Dr. Katherine A. Mazzio, HZB, explains: The process of co-intercalation could improve upon efficiency by enabling better low temperature performance. It could also be utilised to improve upon alternative cell concepts such as using multi-valent ions instead of Li+ or Na+ storage that are particularly sensitive to the solvation shell.”

Source: chemeurope.com

comments closed

Related News

March 19, 2023

EU clears Agrofert’s acquisition of Borealis nitrogen business

Chemical Value Chain

The European Union said Monday that it has approved Agrofert Group’s acquisition of Borealis AG’s nitrogen business after concluding that the deal wouldn’t raise competition concerns. Agrofert is a Czech conglomerate, while Austrian chemical and fertilizer company Borealis is 75%-owned by OMV AG with the remaining 25% held by Abu Dhabi National Oil Co.

March 19, 2023

LyondellBasell acquires European plastics recycler Mepol

Chemical Value Chain

LyondellBasell Industries N.V. and Mepol Group announced they have entered into a definitive agreement for LyondellBasell to acquire Mepol Group, a manufacturer of recycled, high-performing technical compounds located in Italy and Poland.

March 19, 2023

Univar Solutions to be acquired by Apollo Funds for $8.1 Billion

Chemical Value Chain

Univar Solutions Inc and Apollo announced that funds managed by affiliates of Apollo have entered into a definitive merger agreement to acquire the Company in an all-cash transaction that values the Company at an enterprise value of approximately $8.1 billion.

How can we help you?

We're easy to reach