A serious drawback of organic cathode materials for metal-ion and dual-ion batteries is the poor electronic conductivity of cathode materials leading to relatively low loading of active material in the electrode composite. Using excessive amounts of electrochemically non-active conductive fillers and polymeric binders approaching 40–60% of the total electrode weight makes organic cathodes non-competitive with respect to their inorganic counterparts, which operate efficiently with 3–4 times less ballast weight. In this work, we present non-doped polydiphenylamine (PDPA) as a highly promising positive electrode material for lithium and potassium based dual-ion batteries. In contrast to the vast majority of organic cathodes, the good intrinsic conductivity of PDPA allowed the spectacular increase of its loading in the cathode composites up to 80% thus reducing the ballast weight down to 20%, which brings the performance of organic materials closer to that of state-of-the-art inorganic cathodes. In particular, PDPA showed an impressive energy density of up to 523 W h kg⁻¹ for lithium- and up to 462 W h kg⁻¹ for potassium half-cells with an active material loading of 80%, which outperforms significantly the characteristics reached for previously reported polyaniline (PAni) and polytriphenylamine (PTPA) polymeric cathodes under the same conditions. Analysis of the literature data revealed that PDPA delivered record-high values of energy density recalculated for full cathode mass (418 W h kg⁻¹) among all organic polymer cathodes for dual-ion batteries reported so far.

The structure of MQ copolymers of the general chemical formula [(CH₃)₃SiO_0.5]_m [SiO₂]_n was characterized by means of solid-state magic angle spinning (MAS) nuclear magnetic resonance (NMR) spectroscopy. The MQ copolymers are highly branched polycyclic compounds (densely cross-linked nanosized networks). MQ copolymers were prepared by hydrolytic polycondensation in active medium. ²⁹Si NMR spectra were obtained by single pulse excitation (or direct polarization, DP) and cross-polarization (CP) ²⁹Si{¹H} techniques in concert with MAS. It was shown that material consist of monofunctional M (≡SiO Si (CH₃)₃) and two types of tetrafunctional Q units: Q⁴ ((≡SiO)₄ Si) and Q³ ((≡SiO)₃ SiOH). Spin–lattice relaxation times T ₁ measurements of ²⁹Si nuclei and analysis of ²⁹Si{¹H} variable contact time signal intensities allowed us to obtain quantitative data on the relative content of different sites in copolymers. These investigations indicate that MQ copolymers represent dense structure with core and shell.

Cellulose HogC was produced by the modified traditional method with 35% yield from the stem of Sosnovsky hogweed and was characterized by elemental analysis, infrared (IR) spectroscopy, powder X-ray diffractometry, differential scanning calorimetry (DSC) and X-ray photoelectron spectroscopy (XPS). For HogC, the degree of crystallinity (approximately 70%) and the glass transition temperature (105–108 °C) were determined. It was found that the whiteness characteristic in the case of HogC was 92% and this significate was obtained without a bleaching procedure using chlorine-containing reagents. In this paper, the possibility of hydrophobization of HogC films by treatment with radiation-synthesized telomers of tetrafluoroethylene is shown. It was found that the contact angle of the telomer-treated cellulose film surface depended on the properties of the telomers (the chemical nature of the solvent, and the initial concentration of tetrafluoroethylene) and could reach 140 degrees.