The Charge-Discharge Characteristics of Woody Carbon Modified with Fe<SUB>3</SUB>O<SUB>4</SUB> Nano Phase Using the Hydrothermal Method

Abstract

Carbon materials decomposed by low temperature have a higher surface area and contain micro-holes and thus have a larger lithium storage space. In this study, the natural bamboo carbon powders were used as the experimental materials to process the hydrothermal method with the post-treatment. The results show that Fe 3 O 4 thin films are formed on the surface of carbon particles. After charge-discharge testing, it was found that the powders not only increased the capacity, but also improved the irreversibility. With increasing the concentration (0:05$0:25 M), the coating particles became coarse and the thickness of Fe 3 O 4 nano thin films increased. Notably, the C-0.05Fe powder had a better charge-discharge cyclability.

Improvement of Charge‐Discharge Characteristics of the Mg‐Ni Powder Electrodes at 55°C

“…There is a peak at 0.25 V in the charge curve, indicating that a large number of Li ions inserted into the MN11 electrode. After the first cycle, the irreversible reaction is associated with the formation of the SEI layer [19]. With increasing the cycle number, the peak at 0.25 V gradually increased, indicating that cycle performance improved, which is consistent with Figure 3(b).…”

Metallurgical Mechanism and Optical Properties of CuSnZnSSe Powders Using a 2‐Step Sintering Process

“…During mixing, a 2-step sintering process was performed (400 ∘ C for 12 hrs controlled the concentrations of S and Sn; 700 ∘ C for 1 hr controlled the concentration of Se) to adjust the ratios of 𝑥 = S/S + Se. The 2-step sintering process is not only a continuous method, but also the metallurgical efficiency [7,8] which helps to homogenize the compound powders. This study used the 2-step sintering process without using either polluting chemicals or expensive vacuum facilities to investigate the metallurgical mechanism of the CZTSSe powders.…”