Important progress in anti-pulverization research of low-carbon anode materials for lithium batteries in Tongji University

As one of the major energy storage technologies, lithium-ion batteries provide the main driving force for emerging portable electronic devices and electric vehicles. In order to meet market demand, the development of high energy density lithium-ion batteries with long cycle life and high power is imminent. However, the lithium ion battery anode, especially the high-capacity anode material, undergoes a large volume expansion/contraction change during the lithiation/delithiation process, causing severe pulverization of the material, resulting in irreversible capacity loss of the battery, and also causing the cycle performance of the battery. And serious deterioration in rate performance. However, constructing a negative carbon material with low carbon content and anti-powdering performance is extremely challenging. Professor Yang Jinhu from the School of Chemical Science and Engineering of our school is dedicated to the development and application of lithium-ion batteries, actively responding to challenges and tackling research.

It was found that the low-carbon three-shell hollow structure can withstand a large volume expansion rate of up to about 231.8% during lithium intercalation, and can output up to 1099 mAhg-1 reversible specific capacity even after 1450 cycles.

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