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Recently, hollow carbon nanospheres (HCNSs) have played an important role in cutting-edge innovations for energy conversion and storage technologies. To obtain high-performance capacitors, several characteristics must be achieved, including high surface area and high diffusion rate of the electrolyte inside the active material. We report herein the electrochemical performance of interconnected HCNSs as a high-capacitive-performance electrode material. After physical characterization, the electrochemical performance of the HCNSs was evaluated experimentally by cyclic voltammetry, galvanostatic charge-discharge (GCD) measurements, and electrochemical impedance spectroscopy. A straightforward facile technique was applied to improve the working electrodes fabricated from HCNSs as electrode material. The HCNSs exhibited excellent cycling stability during 1000 GCD cycles and reasonable capacitive behavior with specific capacitance of 306.38 F g À1 at a current density of 1 A g À1 . Also, the stability of the electrode in 3000 cycles of cyclic voltammetry testing was 81%.

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An understanding of both the areas of materials science and acoustics is necessary to successfully develop materials for acoustic absorption applications (code 3). This paper investigates the acoustic absorption behavior Hollow Carbon Nanospheres (HCNSs). Sound absorber sample from HCNSs are fabricated and their acoustic properties are investigated through experiment. Tests were conducted using an impedance tube to measure the acoustic absorption coefficient of the HCNSs. Good acoustic absorption performance is observed at 4500−6500 Hz with average absorption coefficient of 31% which is comparable with other nanomaterial absorbers such as CNTs. The outcomes of this investigation highlight the potential of the HCNSs for use as light-weight acoustic absorbers.