Recently, Professor Yang Jinhu from Tongji University's School of Chemical Science and Engineering and Prof. Peng Huisheng from Fudan University made important progress in anti-chalking research of anode materials for lithium-ion batteries.
It is reported that the nanostructured nanostructures (nanodots, nanorods) are assembled layer by layer to form a low-carbon content (4.83%) SnO2 three-shell hollow structure and a high carbon content (35.1% SnO2 double-shell hollow structure found that the low-carbon three-shell hollow structure can withstand tremendous volume expansion up to about 231.8% during lithium intercalation and can output up to 1099 mAh g-1 even after 1450 cycles Capacity; and high-carbon double-shell structure in the cycle will collapse quickly, the performance greatly reduced. The in-situ transmission electron microscopy characterization and mechanical simulation show that the three-shell structure has a special self-organized structure retention mechanism in lithium lithiation / lithiation lithiation, the protective structure will not collapse, and the electrode material can be guaranteed during the long cycle Structural integrity.
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