Nickel-based bimetallic oxides (BMOs) have shown significant potential in battery-type electrodes for pseudo-capacitors given their ability to facilitate redox reactions. In this work, two bimetallic oxides, NiMoO₄ and NiWO₄, were synthesized using a wet chemical route. The structure and electrochemical properties of the pseudo-capacitor cathode materials were characterized. NiMoO₄ showed superior charge storage performance in comparison to NiWO₄, exhibiting a discharge capacitance of 124 and 77 F·g⁻¹, respectively. NiMoO₄, moreover, demonstrates better capacity retention after 1000 cycles with 87.14% compared to 82.22% for NiWO₄. The lower electrochemical performance of the latter was identified to result from the redox behavior during cycling. NiWO₄ reacts in the alkaline solution and forms a passivation layer composed of WO₃ on the electrode, while in contrast, the redox behavior of NiMoO₄ is fully reversible.

All-solid-state lithium-sulfur batteries (ASSLSBs) are a promising next-generation battery technology. They exhibit high energy density, while mitigating intrinsic problems such as polysulfide shuttling and lithium dendrite growth that are common to liquid electrolyte-based batteries. Among the various types of solid electrolytes, solid polymer electrolytes (SPE) are attractive due to their superior flexibility and high safety. In this work, cross-linkable polymers composed of pentaerythritol tetraacrylate (PETEA) and tri(ethylene glycol) divinyl ether (PEG), are incorporated into sulfur–carbon composite cathodes to serve a dual function as both a binder and electrolyte, as a so-called catholyte. The influence of key parameters, including the sulfur–carbon ratio, catholyte content, and ionic conductivity of the electrolyte within the cathode on the electrochemical performance, was investigated. Notably, the sulfur composite cathode containing 30 wt% of the PETEA-PEG copolymer catholyte achieved a high initial discharge capacity of 1236 mAh g${}_{\mathrm{S}}{}^{-1}$ at a C-rate of 0.1 and 80 ${}^{°}$C.