2.1.6 Cellulose/PANi paper based composite electrode
Polyaniline is a kind of conductive polymer material with excellent
pseudo capacitance energy storage performance. However, when it is used
as electrode material of supercapacitor, serious volume shrinkage and
expansion will occur, resulting in obvious brittleness of pure
polyaniline electrode material. As a 1D material with excellent
mechanical properties, cellulose and polyaniline can compensate for the
brittleness of polyaniline, and polyaniline provides excellent
conductivity and energy storage properties. Sun et al. [84] first
introduced RGO into polyaniline polymerization to obtain PANi/RGO
composites. Then the cellulose/PANi/RGO paper based composite electrode
material was prepared by vacuum filtration of cellulose and the
composite material. Among them, the energy storage performance of the
paper-based electrode was significantly improved due to the addition of
RGO (the specific capacitance was 79.71F g-1).
Although the specific capacitance value of the electrode is not as good
as that of the paper-based electrical base. However, as an excellent
pseudo capacitive electrode material, conducting polymers should be
tried to construct structures conducive to improving electrochemical
performance through vacuum filtration in future research. Cellulose and
other conductive polymer materials are used to prepare
cellulose/conductive polymer paper based electrode with more excellent
performance through vacuum filtration.
Based on the above discussion on the preparation of paper based
electrode materials by vacuum filtration. Due to the simple preparation,
strong controllability and similar to papermaking process, scientists
have also prepared a variety of paper-based electrical materials through
this process. Table 1 compares the main parameters of paper based
electrodes prepared by vacuum filtration. It is obvious from the
classification in the table that the process is still mainly focused on
the composite between cellulose and carbon materials and MXene, and
there is still a lack of research on the relationship between cellulose
and conductive polymers and metal oxides. For example, cellulose and
nanowire metal oxides (such as MnO2) can also be used to
prepare paper based electrode materials with excellent performance.
Therefore, in future research on preparation of the paper based
supercapacitor electrode materials by vacuum filtration. We can actively
broaden our vision and combine more electrochemical active substances
with cellulose through this simple preparation process to prepare
cellulose paper based electrode materials with excellent performance. At
the same time, in the era of rapid development of flexible electronics,
we should also pay attention to the use of this process to achieve mass
production. Among them, mature papermaking process should be the first
choice. For example, Tang et al. [81]realized the batch production
through the laboratory vacuum filtration results through the
manufacturing process, which provides a mature guidance scheme for the
production of cellulose paper based supercapacitors. In the 2.4.1
section, we will summarize the application of papermaking technology in
cellulose paper based supercapacitors in detail.
Table1 Performance Parameters of Cellulose Paper Based Electrode Blended
with Multi component Based on Vacuum Filtration