Recently, Shangqiu Normal College chemical engineering Dr Wei research on anode materials of high performance lithium ion batteries made great progress. Related research results have been published in the nanometer scale.
As a new type of lithium ion battery anode materials, metal germanium has the high irreversible capacity, low voltage platform advantages, is expected to replace graphite anode materials, caused the continuous attention of people. But embedded lithium ion and emerge in the process of metal germanium drastic volume change will lead to its capacity attenuation rapidly.
To solve this problem, using the method of electrostatic spinning Dr Wei ge/carbon nanofibers composite materials was synthesized, and the material of ge QDS (6 nanometers) highly dispersed in the porous structure of carbon fiber, make ge quantum dots and carbon materials showed good synergistic effect, realized the germanium compound quantum dots and carbon nanofibers and perfect.
The material as lithium battery anode materials, for the first time the reversible capacity reach 1204 milliampere hours, per mg cycle after 100 time, capacity still can reach 1050 milliampere hours, per mg is almost three times the capacity of the commercial graphite anode.
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