TiNb₆O₁₇ and TiNb₂O₇ were synthesized using a solid-state method. The techniques were used to assess the electrochemical performance and lithium diffusion kinetics of TiNb₆O₁₇ related to the unit cell volume with TiNb₂O₇. The charge-discharge curves and cyclic voltammetry revealed TiNb₆O₁₇ to have a similar redox potential to TiNb₂O₇ as well as a high discharge capacity. The rate performance of TiNb₆O₁₇ was measured using a rate capability test. SSCV and EIS showed that TiNb₆O₁₇ had higher lithium diffusion coefficients during the charging. From GITT, the lithium diffusion coefficients at the phase transition region showed the largest increase from TiNb₂O₇ to TiNb₆O₁₇.

Metallic silver nickel oxide honeycomb nanoarrays were synthesized via a surfactant-assisted hydrothermal route. The crystal structure of the Ag/NiO nanoarrays was confirmed by X-ray diffraction. X-ray photoelectron spectroscopy confirmed the valance state of the nickel, oxygen, and metallic silver. The morphological studies and energy dispersive X-ray spectroscopy revealed the honeycomb structured nanoarrays and the elemental distribution of the prepared sample, respectively. The three-electrode measurements showed that the Ag/NiO nanoarray is a suitable electrode material for supercapacitor applications, which delivers the maximum specific capacity of 824 C g⁻¹ at a specific current of 2.5 A g⁻¹. An Ag/NiO positive electrode-based asymmetric device was fabricated and tested. The asymmetric device yielded a high specific cell capacity of 204 C g⁻¹ at a specific current of 2.5 A g⁻¹ as well as a maximum energy density of 63.75 W h kg⁻¹ at a power density of 2812.5 W kg⁻¹. These results are comparable to those of (NiMH) metal hydride batteries.

The Zn ₃ V ₂ O ₈ nanoplatelets exhibit a maximum specific capacitance of 302 F g ⁻¹ with 98% capacitance retention.