The United States successfully developed a porous graphene composite electrode technology

It is reported that many products in daily life are inseparable from the battery, but the charging speed and use time of the battery have always been criticized. Recently, Chinese scientists in the United States reported in the latest issue of the journal Science that they have successfully developed a porous graphene composite electrode technology, which is an important step toward the development of batteries with fast charging speed and long battery life.

Professor Lin Chengfeng of the University of California, Los Angeles, said that the speed of charging is determined by the power density. The length of use is determined by the energy density. However, for most batteries today, increasing power density and increasing energy density often conflict with each other. The composite electrode made of porous graphene as a three-dimensional framework structure and uniformly growing nano-particles of antimony pentoxide can simultaneously achieve the two goals of fast charging and long use time.

Lithium-ion batteries are currently the most mainstream battery type, but their energy density and other properties are considered to be close to the limit. Over the past 10 years, much research in academia has focused on new electrode materials, especially nanostructured electrode materials. These materials can deliver very high energy or fast charge in experiments, but they have not been able to achieve the desired performance in commercial devices.

Graphene is a two-dimensional crystal which is separated from a graphite material and composed of carbon atoms and has excellent electrical conductivity. This study uses a three-dimensional porous graphene structure and bismuth pentoxide as an electrode material to solve the related technical problems and successfully achieve a combination of higher battery capacity and ultra-fast charge and discharge.

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