Figure 3. (a) TEM diagram of ZMOP-4; (b-f) Mn, O, N, Zn element
distribution diagram of ZMOP-4
In Figure 4b , the detailed molecular framework of the ZMOP-x
composites was conducted by FTIR. It can be seen that the different
amount of PPy mainly affects the peak position of 1120
cm-1. Among them, when there is no or little content
of PPy was added, the formation of the peak couldn’t be seen at the peak
of 1120 cm-1. With the increasing amount of PPy,
ZMOP-4, and ZMOP-6 samples have weak peaks at the position of 1120
cm-1, indicating that the C-N tensile vibration
strength of these two ratios is relatively high. Further indicating that
the appropriate addition of PPy has a favorable impact on the electrode
material to promote the transport and diffusion process of
Zn2+, and benefits by offering more active points to
increase the Zn2+ storage.23,24 In
Figure 4b, the peak for the C=C/C-C skeleton vibration is observed at
1630 cm-1, while the C-H in-plane vibration peak
appears at 1400 cm-1. And peaks at 978
cm-1 are owed to the N-H out-of-plane deformation
vibration. Furthermore, the peaks at 718 cm-1 and 530
cm-1 correspond to the tensile vibrations of Mn-O-Mn
and Mn-O.25 All these peaks are indicative of the
molecular structure of PPy and α-MnO2, demonstrating the effective
preparation of the ZMOP composites at a microscopic
level.26