"Lithium battery anode material" graphene/zirconium hydrogen phosphate composite material
Lithium-ion batteries are widely used in the fields of small mobile electronic products such as cameras, mobile phones, and notebook computers due to their advantages of high working voltage, high energy density, and no memory effect. They are also used in the fields of power electricity and energy storage battery cells. Eye-catching development prospects. However, with the intensification of the energy crisis and the rapid growth of portable electronic devices and electric vehicles, the current commercial graphite anode materials for lithium-ion batteries can no longer meet their needs.
In 2004, physicists Andre Heim and Konstantin Novoselov of the University of Manchester in the United Kingdom successfully separated two-dimensional carbon substances that can exist separately from graphite through a simple mechanical peeling method—— Graphene, and its properties were measured and characterized, showing its superior physical properties, thus creating the prelude to graphene research. The two scientists also won the 2010 Nobel Prize in Physics.
As the latest form of carbon nanomaterials after fullerenes and carbon nanotubes, graphene has a series of novel physical and chemical properties since it was reported, such as ultra-fast charge transfer speed, huge specific surface area and ultra-high Mechanical strength, etc., are widely used in electrochemical fields such as supercapacitors and electrocatalysis.
The composite of zirconium hydrogen phosphate and graphene can not only improve the conductivity of the battery and improve its volume expansion effect, but also has good lithium storage capacity and can increase the specific capacity of the composite material. Compared with other carbon materials, graphene has the advantages of large specific surface area, high mechanical strength, and good electrical conductivity. Research on SnO2, FeSb2 and other materials shows that the introduction of graphene can effectively improve its electrochemical performance.