New research has found ways to improve the properties of graphene materials

 A new study has found that the purity of graphene may be an obstacle to the widespread use of the new material. Reducing silicon contamination in graphene is expected to improve its performance and realize its potential in industry.
graphene is a two-dimensional material made of a layer of carbon atoms separated from graphite
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. With its light, tough, high conductive and thermal efficiency, it is a new generation of materials that industry has high hopes for. However, the actual performance of graphene is not satisfactory, the speed of popularity in industry is not ideal.
The team, led by researchers at the Royal Melbourne Institute of Technology in Australia, reported in the British journal Nature Communications that they used state-of-the-art scanning transmission electron microscopes to examine commercial-grade graphene samples on the market at the atomic level and found high levels of silicon contamination, which had a significant impact on the performance of graphite thinners. For example, contaminated graphene as an electrode can perform 50% less than theoretically expected.
Longhla Ali Jalili, who was involved in the study, told Xinhua in a telephone interview that since graphene has only one layer of atoms and is particularly vulnerable to surface contamination, which makes graphene's performance less stable, it is difficult to establish an industry standard to regulate graphene's performance indicators.
further experiments have found that although it is difficult to remove silicon contamination directly from graphene, it is easier to obtain high-purity graphene by removing the silicon components in graphene, the raw material used to prepare graphene. Using this method, the researchers prepared high-purity graphene and used it to make high-capacity batteries, as well as highly sensitive humidity sensors, confirming the excellence of high-purity graphene.