![]() ![]() In the case of anisotropic electrolytes, these materials could finetune the complex interplay between ion transport and interfacial chemistry, thwarting build-up that proceeds dendrite formation. A classic example of an anisotropic material is wood, which is stronger in the direction of the grain, visible as lines in the wood, versus against the grain. The innovative strategies for electrolyte design that have emerged include pursuing materials that are anisotropic, which means that they exhibit different properties in different directions. “Our hope is that other researchers can use this guidance from our study to design devices that have the right properties and reduce the range of trial-and-error, experimental variations they have to do in the lab,” Tchelepi said. With the results of the study in hand, scientists can concentrate on physically plausible material and architecture combinations. To address this issue, the research team created a mathematical representation of the batteries’ internal electric fields and transport of lithium ions through the electrolyte material, as well as other relevant mechanisms. However, the laboratory work is labour-intensive, and results from relevant experiments have proven difficult to interpret. Scientists have attempted to understand the factors leading to dendrite formation for decades. Interpreting the results: Understanding batteries’ internal electric fields “This study provides some of the specific details about the conditions under which dendrites can form, as well as possible pathways for suppressing their growth,” added Tchelepi, co-author of the study and a Professor of Energy Resources Engineering at Stanford’s School of Earth, Energy & Environmental Sciences. “Our mathematical framework accounts for the key chemical and physical processes in lithium-metal batteries at the appropriate scale.” “Our study’s aim is to help guide the design of lithium-metal batteries with a longer life span,” explained Weiyu Li, lead author of the study and a PhD Student in Energy Resources Engineering. This model provided the insight that swapping in new electrolytes – the medium through which lithium ions travel between the two electrodes inside a battery – with certain properties could slow or even completely stop dendrite growth. Approaching the dendrite problem from a theoretical perspectiveĪpproaching this issue with a theoretical perspective meant that the research team developed a mathematical model that combines the physics and chemistry involved in dendrite formation. This dendrite formation in batteries considerably degrades battery performance and ultimately leads to failure which, in some instances, can even dangerously ignite fires. A primary explanation for this is the formation of ‘dendrites’, which are thin, metallic, tree-like structures that grow as lithium metal accumulates on electrodes inside the battery. ![]() However, it has been observed by researchers that the commercial use of rechargeable lithium-metal batteries has been limited. This is because, compared to lithium-ion devices, lithium-metal batteries hold more energy, charge up faster, and weigh considerably less. In comparison, it has been observed that lithium-metal batteries hold tremendous promise as next-generation energy storage devices. Building better, safer lithium-metal batteriesĬurrently, rechargeable lithium-ion cells are widely utilised in portable electronics and electric cars. This study was recently published in the Journal of The Electrochemical Society. A research team from Stanford University has investigated dendrite formation to further improve lithium-metal batteries.Ī novel mathematical model combin ing physics and chemistry to develop highly promising lithium-metal batteries has presented scientists with credible, fresh solutions to a problem that has been previously known to cause degradation and failure. ![]()
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