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It is reported that many products in daily life are inseparable from batteries, but the charging speed and use time of batteries have always been criticized
.
Recently, Chinese scientists in the United States reported in the latest issue of the American journal Science that they have successfully developed a porous graphene composite electrode technology, which is an important step
towards the development of batteries with fast charging speed and strong endurance.
Professor Duan Feng of the University of California, Los Angeles said that the charging speed is determined by the power density, and the length of use is determined by the energy density, but for most batteries now, increasing the power density and increasing the energy density are usually in conflict
.
The composite electrode made of porous graphene as a three-dimensional frame structure and uniform growth of nanoparticles niobium pentoxide on the surface can achieve the two goals
of fast charging and long service 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 output high energy or achieve fast charging in experiments, but have not been able to achieve ideal performance
in commercial devices.
Graphene is a two-dimensional crystal stripped from graphite material composed of carbon atoms with excellent electrical conductivity
.
In this study, the three-dimensional porous graphene structure and niobium pentoxide were used as the electrode material to solve the related technical problems and successfully realized the combination of
high battery capacity and ultra-fast charge and discharge.
It is reported that many products in daily life are inseparable from batteries, but the charging speed and use time of batteries have always been criticized
.
Recently, Chinese scientists in the United States reported in the latest issue of the American journal Science that they have successfully developed a porous graphene composite electrode technology, which is an important step
towards the development of batteries with fast charging speed and strong endurance.
Professor Duan Feng of the University of California, Los Angeles said that the charging speed is determined by the power density, and the length of use is determined by the energy density, but for most batteries now, increasing the power density and increasing the energy density are usually in conflict
.
The composite electrode made of porous graphene as a three-dimensional frame structure and uniform growth of nanoparticles niobium pentoxide on the surface can achieve the two goals
of fast charging and long service 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 output high energy or achieve fast charging in experiments, but have not been able to achieve ideal performance
in commercial devices.
Graphene is a two-dimensional crystal stripped from graphite material composed of carbon atoms with excellent electrical conductivity
.
In this study, the three-dimensional porous graphene structure and niobium pentoxide were used as the electrode material to solve the related technical problems and successfully realized the combination of
high battery capacity and ultra-fast charge and discharge.
