![]() This, they found, improved the silicon anode’s integrity and stopped it from swelling up. In this earlier work, OIST researchers built a multi-layer structure where silicon was layered in a way where it was placed between tantalum metal nanoparticles. In this study, the OIST researchers built upon previous work from 2017. What are battery energy storage systems? The unique nanostructure This volume increase can also prevent the formation of a protective layer between the anode and the electrolyte, reducing the battery’s lifespan. The stability of silicon-based anodes is much lower than carbon-based graphite anodes, and the four-fold increase in volume causes the electrode to fracture and break. This is why the OIST researchers chose to work with this material in their research. For every single silicon atom, four lithium ions can bind with them. ![]() Silicon atoms can hold more charge than carbon atoms. When it comes to increasing energy density, it’s very much a numbers game. In a press release, former OIST researcher and first author of the study Dr Marta Haro explained that “when a battery is being used, the lithium ions move back into the cathode and an electric current is released from the battery.” He added that in graphite anodes, however, six atoms are needed to store one lithium ion, meaning that the energy densities of these batteries are low.
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