The "sulfur template method" proposed by the Tianjin research team makes it possible for CR2430 battery to become "smaller"

　　In recent years, electronic products such as mobile phones and laptops have been developing towards lighter and thinner products. Among them, secondary (rechargeable) batteries require continuous improvement in battery life while maintaining the same size or smaller. In addition, in the coming era of new energy vehicles, how to have longer range of power in a limited vehicle body space is also a problem that needs to be solved. Let’s learn about the relevant content below.

　　To make the next generation of CR2430 battery lighter: Tianjin University scientific team developed the "sulfur template method"

　　In response to the increasing demand, researchers have been committed to improving the performance of secondary batteries. They found that nanotechnology can make batteries "lighter" and "faster", but due to the low density of nanomaterials, "smaller" has become a difficult problem for scientific researchers in the field of energy storage.

　　Recently, Professor Yang Quanhong from the School of Chemical Engineering of Tianjin University and his research team proposed a "sulfur template method". Through the design of high volume energy density lithium-ion battery anode materials, they finally completed the "tailor-made" graphene wrapping of active particles. Making lithium-ion batteries "smaller" possible.

　　In studying the properties of materials, researchers have found that although lithium-ion batteries already have high energy density, non-carbon materials such as tin and silicon are expected to replace current commercial graphite and significantly increase the mass energy density of lithium-ion batteries. However, the volume expansion problem of these two materials limits their application and development.

　　So the researchers used a carbon cage structure constructed of improved carbon nanomaterials to solve this problem. Based on graphene interface assembly, they invented a sulfur template technology that accurately customizes dense porous carbon cages.

　　In the process of building a dense graphene network using capillary evaporation technology, the researchers introduced sulfur as a flowable volumetric template to complete the customization of the graphene carbon coat for non-carbon active particles. In the experiment, by modulating the amount of sulfur template used, they can precisely control the three-dimensional graphene carbon cage structure to achieve "fitting" coating of the size of non-carbon active particles, thereby effectively buffering the huge damage caused by lithium embedding of non-carbon active particles. Volume expansion enables it to exhibit excellent volume performance as a negative electrode for lithium-ion batteries.

　　Through this research, Professor Yang Quanhong’s research team successfully solved the bottleneck problem of high density and porosity of carbon materials and obtained high-density porous carbon materials.

　　It is worth pointing out that this "tailor-made" design idea of a carbon cage structure based on graphene assembly can be expanded into a universal construction strategy for next-generation high-energy lithium-ion batteries and electrode materials such as lithium-sulfur batteries and lithium-air batteries. The energy storage battery is expected to achieve "small size" and "high capacity", greatly meeting users' needs for portability.

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