Polypyrrole/Graphene/Polyaniline Ternary Nanocomposite with High Thermoelectric Power Factor

Abstract

Polypyrrole/Graphene/Polyaniline (PPy/GNs/PANi) ternary nanocomposite with high thermoelectric power factor has been successfully prepared through the combination of in situ polymerization and solution process. FTIR, Raman spectra, XRD, and SEM analyses show the strong π-π interactions existed among PPy, GNs, and PANi, leading to the formation of more ordered regions in the composite. Both the in situ polymerization and solution process can enhance the dispersion homogeneity of graphene in the polymer matrix, bringing about increased nanointerfaces in the PPy/GNs/PANi composite. The thermoelectric properties of Polypyrrole/Graphene (PPy/GNs), Polyaniline/Graphene (PANi/GNs), and PPy/GNs/PANi composites are measured at different temperatures after being cold pressed. Consequently, the PPy/GNs/PANi composite with 32 wt % graphene demonstrates optimal electrical conductivity, Seebeck coefficient and extremely high power factor of up to 52.5 μ W m K, which is almost 1.6 × 10 times, 1.4 × 10 times, 2.7 times, and 3.6 times higher than those of the pure PANi, pure PPy, PPy/GNs composite, and PANi/GNs composite, respectively.

Enhanced thermoelectric properties of two-dimensional conjugated polymers

“…[13][14][15][16][17] On the other hand, additional components, such as graphene and carbon nanotubes, were added into conjugated polymer matrix for boosting the electrical conductivity and Seebeck coefficient as well. [18,19] However, all these studied conjugated polymers for thermoelectric applications possess repeated one-dimensional (1D) conjugated backbones. [20,21] The intra-molecular charge transport along the backbone of 1D conjugated polymer is efficient, but the intermolecular charge transport is not efficient due to non-conjugated side chains.…”

Flexible Thermoelectric Composite Films of Polypyrrole Nanotubes Coated Paper

“…Therefore, more and more researchers have focused on the TE properties of PPy and its corresponding composites [2][3][4][5][6]. For example, a maximum ZT value (S 2 σT/κ, S is the Seebeck coefficient, σ is the electrical conductivity, κ is the thermal conductivity, and T is the absolute temperature) of 2.8 × 10 −3 at room temperature (RT) was achieved for the PPy/graphene nanosheet composites with a weight ratio of pyrrole monomer to graphene nanosheets of 1:0.4 [2]; a maximum power factor (S 2 σ) of 2.079 µW·m −1 ·K −2 was obtained at RT for multi-walled carbon nanotube/PPy composites with 20 wt % multi-walled carbon nanotubes [3], and a power factor of 52.5 µW·m −1 ·K −2 was achieved by a PPy/graphene/polyaniline ternary nanocomposite with 32 wt % graphene at 90 • C [7]. Most recently, a ZT value of 0.0043 was calculated along its chain direction of a crystalline PPy-PF 6 using the first-principles method [1].…”

Preparation of Keggin‐Type Polyoxometallate/Polypyrrole Composite Microtubes and Their Assist‐Catalytic Properties Towards Methanol Oxidation

“…For example, Bashid and coworkers have prepared a flexible and bendable supercapacitor device by using electrochemical deposition of PPy and rGO on the surface of carbon bundle fiber and assembled into supercapacitor devices as electrodes . Wang and coworkers fabricated polypyrrole/graphene/polyaniline (PPy/GNs/PANi) ternary nanocomposite through combination of in situ polymerization and solution process …”