Electric vehicles (EVs) are an attractive alternative to conventional vehicles powered by internal combustion engines due to their low carbon footprint, low running cost, and higher energy efficiency. However, currently, they suffer from a lower range than conventional vehicles, which induces range anxiety for consumers. This work explores the EV parameters that strongly impact range using data-driven techniques. A detailed dataset of the technical specifications of commercial EV models manufactured from 2008 to 2021 was collected through web mining. Strong correlations were observed between range and battery capacity, top speed, curb weight, and acceleration (with Pearson coefficients of 0.90, 0.79, 0.70, and −0.84, respectively). Furthermore, regression algorithms were trained and tested on this dataset, with the lowest root-mean-squared error (RMSE) of 31.4 km obtained from support vector machine regression. With a mean EV range in the test set of 364.5 km, an RMSE of 31.4 km equates to around 8.6% accuracy. Additionally, simple linear relationships between EV range and EV model, battery, and performance parameters were determined that may be useful to EV consumers in calculating range.

A high capacitance and widened voltage frames for an aqueous supercapacitor system are challenging to realize simultaneously in an aqueous medium. The severe water splitting seriously restricts the narrow voltage of the aqueous electrolyte beyond 2 V. To overcome this limitation, herein, we proposed the facile wet-chemical synthesis of a new CuSe-TiO₂-GO ternary nanocomposite for hybrid supercapacitors, thus boosting the specific energy up to some maximum extent. The capacitive charge storage mechanism of the CuSe-TiO₂-GO ternary nanocomposite electrode was tested in an aqueous solution with 3 M KOH as the electrolyte in a three-cell mode assembly. The voltammogram analysis manifests good reversibility and a remarkable capacitive response at various currents and sweep rates, with a durable rate capability. At the same time, the discharge/charge platforms realize the most significant capacitance and a capacity of 920 F/g (153 mAh/g), supported by the impedance analysis with minimal resistances, ensuring the supply of electrolyte ion diffusion to the active host electrode interface. The built 2 V CuSe-TiO₂-GO||AC-GO||KOH hybrid supercapacitor accomplished a significant capacitance of 175 F/g, high specific energy of 36 Wh/kg, superior specific power of 4781 W/kg, and extraordinary stability of 91.3% retention relative to the stable cycling performance. These merits pave a new way to build other ternary nanocomposites to achieve superior performance for energy storage devices.

To meet practical application requirements, high specific energy and specific power and excellent cyclability are highly desired. Herein, we design and synthesize fine CuCo₂O₄ nanoparticles wrapped in a conductive rGO aerogel network as a robust conductive anode for Li-ion capacitors (LICs). The nanostructure of the resulting CuCo₂O₄/rGO composite provides a high capacity of 1285 mA h g⁻¹ at a small current density of 0.1 A g⁻¹. Moreover, the conductive anode was combined with an activated carbon (AC) cathode (denoted as CuCo₂O₄/rGO//AC) to construct high-performance LICs. The as-prepared device (CuCo₂O₄/rGO//AC LIC) exhibits capacitance of 49.5 F g⁻¹ at 1 A g⁻¹ and retained capacitance of 34.0 F g⁻¹ when the current density increased to 4 A g⁻¹, demonstrating outstanding rate performance. Excitingly, our fabricated CuCo₂O₄/rGO//AC LIC exhibits ultra-high specific energy and specific power (396 W h kg⁻¹/8 kW kg⁻¹) with excellent cyclability (∼100% retention after 16 000 cycles) for the first time. We demonstrate that a single LIC cell could light a blue LED with sufficient illumination for 100 s, opening the way to possible realistic applications. Additionally, based on the synergistic effect of the conductive rGO aerogel matrix and the downsized CuCo₂O₄ particles of the CuCo₂O₄/rGO anode, the superior electrochemical performance was attributable to increased conductivity and structural integrity during Li⁺ insertion/extraction.