Y. W. Tian

Comparing the electrochemical properties of pure phase Zn2SnO4 and composite Zn2SnO4/C

Compound Zn2SnO4 was synthesized by a hydrothermal method in which SnCl4 · 5H2O, ZnCl2 and N2H4 · H2O were used as reactants. Composite Zn2SnO4/C was then synthesized through a carbothermic reduction process using the as-prepared Zn2SnO4 and glucose as reactants. Comparing to the pure Zn2SnO4, some improved electrochemical properties were obtained for composite Zn2SnO4/C. When doped with 15% glucose, the composite Zn2SnO4/C showed the best electrochemical performance. Its first discharge capacity was about 1500 mA h g−1, with a capacity retain of 500 mA h g−1 in the 40th cycle at a constant current density of 100 mA/g in the voltage range of 0.05–3.0 V. There were also some differences displayed in their cyclic voltammogram.

Hydrothermal synthesis of Zn2Sn1 − xTixO4 as anode material for lithium-ion batteries

A novel electrode material, Zn2Sn1 − xTixO4 (x = 0 and 0.1), which is superior in its electrochemical characteristics to the reverse spinel Zn2SnO4, is synthesized by hydrothermal method. The admixture of TiO2 levels out the volume expanding caused by the Li-Sn and Li-Zn alloy formation thus improving the material’s cyclability.

An Improved Lime Sinter Process to Produce Al2O3 from Low‐Grade Al‐Containing Resources

Low-grade bauxites and non-bauxite resources are widely distributed, which are suitable to extract alumina by the lime sinter process. The application of the lime sinter process is restricted by the high consumption of calcium, the large amount of slag and the poor alumina leaching property of clinkers. An improved lime sinter process based on the dry-sintering is proposed by adding Na2O-containing compounds to decrease CaO addition and increase alumina leaching property. The molar ratios of CaO to Al2O3 and Na2O to Al2O3 are 0.6 and 0.4, respectively. Na4Ca3(AlO2)10 as well as trace amounts of CaO•Al2O3 and 12CaO•7Al2O3 are formed after sintering at 1200°C for 30min in CaO-Al2O3-Na2O system, the alumina leaching efficiency of which is above 90%. The minerals after sintering in CaO-Al2O3-SiO2-Na2O system include Na4Ca3(AlO2)10, 12CaO•7Al2O3, 2CaO•SiO2 and 2CaO•Al2O3•SiO2. The leaching efficiency of clinkers increases as the sintering temperature increases to 1300°C.

Hydrothermal synthesis of Zn2Sn1 − x Ti x O4 as anode material for lithium-ion batteries

A novel electrode material, Zn2Sn1 − xTixO4 (x = 0 and 0.1), which is superior in its electrochemical characteristics to the reverse spinel Zn2SnO4, is synthesized by hydrothermal method. The admixture of TiO2 levels out the volume expanding caused by the Li-Sn and Li-Zn alloy formation thus improving the material’s cyclability.

Hydrothermal synthesis of Zn 2 Sn 1 − x Ti x O 4 as anode material for lithium-ion batteries

A novel electrode material, Zn2Sn1 − xTixO4 (x = 0 and 0.1), which is superior in its electrochemical characteristics to the reverse spinel Zn2SnO4, is synthesized by hydrothermal method. The admixture of TiO2 levels out the volume expanding caused by the Li-Sn and Li-Zn alloy formation thus improving the material’s cyclability.