L1022 battery

　　Technology that can make L1022 battery "downsizing" - sulfur template technology

　　How can mobile phones, laptops, etc. be made lighter and thinner, and how can electric vehicles have longer cruising range... The research team of Yang Quanhong of Tianjin University innovatively proposed the "sulfur template method". Through the design of negative electrode materials for high volume energy density lithium-ion batteries, the research team finally Complete the "tailor-made" wrapping of active particles by graphene. With the help of this technology, lithium-ion batteries are expected to be further "downsized" in the future and become thinner, lighter and more durable. The latest issue of "Nature Communications" also published the research results online.

　　Increased user portability requirements and space constraints require today's lithium-ion batteries to have high volumetric energy density. Nanotechnology can make batteries "lighter", but due to the low density of nanomaterials, "smaller" has become a difficult problem for researchers in the field of energy storage. The carbon cage structure constructed of carbon nanomaterials is considered to be the main means to solve the problem of huge volume expansion when non-carbon anode materials such as tin and silicon are embedded with lithium. The precise customization of the carbon cage structure is the only way to industrialize new high-performance anode materials.

　　Professor Yang Quanhong's research team invented a sulfur template technology for accurately customizing dense porous carbon cages based on graphene interface assembly. Using the capillary evaporation densification strategy of graphene gel, it successfully solved the "fish and bear" problem of high density and porosity of carbon materials. Solving the bottleneck problem of "cannot have both at the same time", we have successfully obtained high-density porous carbon materials. This "tailor-made" design idea of a carbon cage structure based on graphene assembly can be expanded into a construction strategy for universal next-generation high-energy lithium-ion batteries and electrode materials such as lithium-sulfur batteries and lithium-air batteries, thus making energy storage batteries promising. Realize "small size" and "high capacity".

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