MXenes for energy storage: Chemical imaging more than just surface deep
A new method in spectromicroscopy significantly improves the study of chemical reactions at the nanoscale, both on surfaces and inside layered materials. scanning x-ray microscopy (SXM) at MAXYMUS beamline of BESSY II enables the investigation of chemical species adsorbed on the top layer (surface) or intercalated within the MXene electrode (bulk) with high chemical sensitivity. The method was developed by a HZB team led by Dr. Tristan Petit. The scientists demonstrated among others first SXM on MXene flakes, a material used as electrode in lithium-ion batteries.
What is so special about MXenes and why is the new method so valuable? The short cartoon manages to answer these questions in just a few images. The images were created with the help of ChatGPT.
© Faidra Amargianou/ChatGPT
Since their discovery in 2011, MXenes have gathered significant scientific interest due to their versatile tunable properties and diverse applications, from energy storage to electromagnetic shielding. Researchers have been working to decipher the complex chemistry of MXenes at the nanoscale.
The team of Dr. Tristan Petit now made a significant progress in MXene characterization, as described in their recent publication. They utilized SXM to investigate the chemical bonding of Ti3C2Tx MXenes, with Tx denoting the terminations (Tx=O, OH, F, Cl), with high spatial and spectral resolution. The novelty in this work is to combine simultaneously two detection modes, transmission and electron yield, enabling different probing depths.
SXM provided detailed insights into the chemical composition and structure of MXenes. According to Faidra Amargianou, first author of the study: "Our findings shed light on the chemical bonding within MXene structure, and with surrounding species, offering new perspective for their utilization across various applications, especially in electrochemical energy storage."
For the first time, SXM was employed to image MXenes, revealing details of the local bonding between titanium and terminations within the MXene structure. The researchers also examined the influence of different synthesis routes on MXene chemistry, shedding light on the impact of terminations on the electronic properties of MXene.
Furthermore, the application of SXM in analyzing MXene-based materials in lithium-ion batteries yielded valuable insights into changes in MXene chemistry after battery cycling. As Faidra Amargianou explains, “The bulk of MXene electrode remains stable during electrochemical cycling with signs of possible Li+ intercalation. Electrolyte does not lead to degradation of the MXene and lays on top of the MXene electrode”.
In summary, this study provides valuable insights into the local chemistry of MXenes and underscores the potential of SXM in the characterization of other layered materials. As Petit concludes, "This work highlights the significance of advanced chemical imaging techniques like SXM in unraveling the interactions of layered materials in complex systems. We are currently working on enabling in situ electrochemical SXM measurements directly in liquid environment."
Original publication
Other news from the department science
![[Fe]-hydrogenase catalysis visualized using para-hydrogen-enhanced nuclear magnetic resonance spectroscopy](https://img.chemie.de/Portal/News/675fd46b9b54f_sBuG8s4sS.png?tr=w-712,h-534,cm-extract,x-0,y-16:n-xl)
These products might interest you
Battery Testing Services by Battery Dynamics
Learn more about the performance and service life of your battery cells in less time
Benefit from modern measurement technology and an experienced team
Batt-TDS by ystral
YSTRAL Batt-TDS mixing and dispersing machine
Boost your battery slurry process
Get the chemical industry in your inbox
From now on, don't miss a thing: Our newsletter for the chemical industry, analytics, lab technology and process engineering brings you up to date every Tuesday and Thursday. The latest industry news, product highlights and innovations - compact and easy to understand in your inbox. Researched by us so you don't have to.
Most read news
More news from our other portals
See the theme worlds for related content
Topic World Battery Technology
The topic world Battery Technology combines relevant knowledge in a unique way. Here you will find everything about suppliers and their products, webinars, white papers, catalogs and brochures.
Topic World Battery Technology
The topic world Battery Technology combines relevant knowledge in a unique way. Here you will find everything about suppliers and their products, webinars, white papers, catalogs and brochures.
