Let lithium-ion batteries use new bionic nanomaterials

Professor Huang Jianguo of the Department of Chemistry of Zhejiang University, Zhejiang Natural Science Foundation Project "Research on Bionic Nano-Tin Dioxide and Related Compounds as Lithium Ion Battery Anode Material" recently passed the acceptance test. Double, especially improve the structural stability greatly, let people use it with confidence.

Today's increasingly urgent energy and environmental issues make the research and development of environmentally friendly, high energy density and long cycle life lithium-ion batteries of great practical significance, and the development of high-performance anode materials has become one of the research hotspots. Huang Jianguo said that currently the negative electrode of lithium ion batteries generally uses carbon-based graphite materials, but its reversible specific capacity is only 372mAh / g.

Metal oxide materials, especially tin-based metal oxides, are considered to be the anode materials of next-generation lithium-ion batteries to replace graphite-based materials due to their high specific capacity, but the materials caused by the volume change of materials during charging and discharging The collapse of the structure makes its cycle stability poor.

Huang Jianguo and his research team built a series of new-type nano-structured metal oxides and their corresponding composite materials using natural cellulose materials as templates and support structures, and thoroughly studied their unique material structure and materials used as anode materials for lithium ion batteries Electrochemical properties. This type of material has a three-dimensional network porous structure of natural cellulose and good conductivity, which effectively relieves the volume change of the material during charging and discharging to achieve better material stability and improve the battery's cycle performance. Studies have shown that natural cellulose materials provide an ideal platform for the construction of functional nanomaterials with different compositions.

In recent years, with the support of the Zhejiang Provincial Natural Science Foundation Outstanding Youth Team Project and other funds, the Huang Jianguo team has designed and constructed a series of nano-structured biomimetic functional materials based on natural cellulose materials, with superhydrophobic surfaces, sensing and catalysis. Carried out corresponding application exploration. This research broadens the research of self-assembled biomimetic functional nanostructured materials, and provides new ideas for the design, preparation and application of new lithium ion battery anode materials.