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Materials Science and Nanotechnology | Volume: 03
WORLD CONGRESS ON SMART MATERIALS AND STRUCTURES
&
3
rd
International Conference on
POLYMER CHEMISTRY AND MATERIALS ENGINEERING
November 21-22, 2019 | Singapore
Joint event on
D
ue to the self-corrosion of Mg, a Mg-air battery has a
rather low anode utilization rate. In order to improve
the anode utilization, work was done to test different
methods such as hot rolling, alloying with indium, as well as
modifications of electrolyte and air cathode with reduced
graphene oxide (RGO). For batteries with a commercial
air cathode and a 3.5% NaCl electrolyte, utilization
rates of hot-rolled Mg-6Al anode and Mg-6Al-1In anode
are 39% and 52% at a current density of 10 mA cm−2,
respectively, higher than 36% of as-cast Mg-6Al anode.
When electrolyte was modified with a water soluble poly
(sodium 4-styrenesulfonate)/RGO, and air cathode was
prepared with an RGO/Mn3O4 nanometer composite, an
anode utilization of 82 % has been achieved with a Mg-6Al-
1In anode. At the same time, an energy density of 1620 Wh
kg-1 has been obtained, much higher than those achieved
with a NaCl electrolyte and a commercial air cathode (1115
Wh kg-1 and 52%). These results were discussed together
with SEM findings of anodes after discharge.
Biography
Guangxin Wang received his PhD from University of Bremen, Germany in
1990. Since then, he has been working as a materials scientist in Germany,
USA and China. Right now, he is a professor of Henan University of Science
and Technology, China. He has published a book and over 90 technical
papers.
e:
wgx58@126.comGuangxin Wang
Henan University of Science and Technology, China
Improving anode utilization of Mg-air batteries
Mater Sci Nanotechnol, Volume: 03