Kate Vanderburgh, senior product specialist at Thermo Fisher Scientific, explains how electron microscopy (EM) drives material innovation to support low-carbon technologies and combat climate change
The advancement of materials is vital for developing low-carbon technologies. In renewable energy, semiconductors boost solar efficiency, while advanced composites improve wind turbine durability. Furthermore, in energy storage, breakthroughs in electrodes and electrolytes enhance battery performance, lifespan and stability.
Electron microscopy (EM) plays a crucial role in these advancements, providing nanoscale resolution for detailed characterisation of material structures, interfaces and defects. This optimises properties such as conductivity, durability and catalytic efficiency, essential for energy storage and renewable energy systems.
Advancing sustainable technology
Several technologies that are core to advancing sustainable progress reap the benefits of EM throughout their lifecycle.
For instance, EM drives advances in solar panel materials by revealing microscopic defects and grain boundary structures with sub-nanometer precision. In perovskite solar cells, EM uncovers variations in crystallinity and composition that affect charge transport and recombination. This precise insight allows researchers to optimise material formulations and processing methods, resulting in higher efficiency and improved device stability.
EM is indispensable throughout the entire lifecycle of battery materials. It enhances the lifespan of lithium-ion and solid-state batteries by identifying structural weaknesses at the nanoscale, detecting defects such as dendrite formation, which can cause short circuits, it also monitors chemical changes during charging. These insights help engineers develop more environmentally-friendly battery materials that support circular economy principles.
Hydrogen technology also benefits from EM’s capabilities. EM is used to analyse hydrogen storage alloys and fuel cell materials by revealing nanoscale structural features and elemental distributions critical for efficient hydrogen uptake and release. This information guides the optimisation of material design, leading to faster hydrogen absorption, improved storage capacity and enhanced long-term stability — key factors for scaling hydrogen-powered transport and renewable energy systems.
ChemiSEM: A step forward in sustainable materials research
Developing advanced materials for low-carbon technologies requires precise structure and compositional analysis. However, modern materials — such as solid-state battery electrolytes and hydrogen storage alloys — present challenges that traditional EM methods struggle to address.
Conventional scanning electron microscopy (SEM) provides high-resolution imaging of material surfaces, revealing grain boundaries and nanoscale defects. Meanwhile, energy dispersive X-ray spectroscopy (EDS) analyses elemental composition.
In traditional workflows, these techniques require sequential analysis, with EDS performed after, or instead of, imaging, often under different conditions. This can lead to inconsistencies, making it difficult to link structure to composition. Furthermore, emerging sustainable materials usually have complex, heterogeneous compositions in which subtle elemental variations impact performance and longevity.
Thermo Fisher’s ChemiSEM presents a single, streamlined solution that integrates SEM imaging and EDS analysis into one user interface. This not only enables faster result times and live structural and compositional analysis but also provides accurate quantification, complete with live peak deconvolution and automated removal of sum and escape peak artifacts.
As an integrated data management platform combining advanced elemental analysis with real-time electron imaging, ChemiPhase within ChemiSEM enables the discovery of material phases through advanced statistical analysis allowing users to perform SEM and EDS analysis simultaneously, reducing response times and minimising redundancies.
Multiple different types of analysis can be performed in ChemiSEM, including point and region analysis, line scans, gross count mapping, quantitative mapping and phase mapping.
Case Study: Ag/Zn Si photovoltaic
Solar energy is a critical form of renewable energy and is primarily harvested by photovoltaics which convert sunlight into electricity. Materials research and characterisation is at the forefront of making current solar cell technology cheaper, more efficient and more reliable. EM is an important technique to view photovoltaic materials at micro and nanoscales to examine the material structure and composition. Figure 1 shows an Ag/Zn Si photovoltaic simultaneously imaged with four different detectors on a Thermo Fisher Apreo ChemiSEM SEM.
At first inspection, there appeared to be differences in material structure and compositional contrast throughout the sample surface. ChemiSEM made it possible to deconvolute these differences owing to topography versus chemical structure with a click of the ChemiSEM colour wheel and spectra buttons and without having to change any imaging conditions. Figure 2 illustrates a ChemiSEM image of the A) Ag/Zn Si photovoltaic and individual quantitative elemental maps of B) silver (blue), C) zinc (pink), and d) silicon (green). Being able to identify the elemental distribution helps to better understand material properties to progress photovoltaic research for a cleaner energy future.
Electron microscopy is proving indispensable not only for early-stage research and development but throughout the entire lifecycle of sustainable materials. Such comprehensive capabilities are critical as nations work to meet the ambitious climate targets set forth in the upcoming 2026–2031 NDC deadlines, ultimately supporting the transition to a sustainable, low-carbon future.
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