Dielectric barrier discharge (DBD) has been widely employed in ozone generation. However

the technology still exhibits relatively low energy yield (

E

Y

) referring to its theoretical value. In this work

E

Y

of ozone generation was improved by optimizing the mesh number

electrode length

and dielectric material in a coaxial DBD reactor with two wire mesh electrodes. Meanwhile

the discharge characteristics were investigated to elucidate the effect of reactor configuration on

E

Y

. Results showed that the discharge characteristics were improved by increasing the mesh number

electrode length

and relative permittivity. When the mesh number was increased from 40 to 100

an improvement of approximately 48% in

E

Y

was obtained. Additionally

higher

E

Y

values were obtained using corundum as the dielectric material relative to polytetrafluoroethylene and quartz. Ultimately

E

Y

in the optimal DBD reactor could reach 326.77 g·(kW·h)

-1

. Compared with the reported DBD reactor

the coaxial DBD reactor with the mesh electrode and the dielectric material

of corundum could effectively improve

E

Y

which lays a foundation for the design of high-efficiency coaxial DBD reactor.