The dynamic characteristics and cycle stability of Mg/Li ion battery (MLIBs) cathodes are keys to develop the electric vehicles. This work proposes a strategy to construct one-dimensional (1D) porous nanomaterials, aiming to ameliorate the overall electrochemical properties of MLIBs. SnO 2 cathodes with nano-fiber (NF-SnO 2 ), nano-single tubular (NST-SnO 2 ) and nano-multitubular (NMT-SnO 2 ) structures were prepared by electrospinning technic, and the modification mechanism of SnO 2 cathodes was discussed. NST-SnO 2 and NMT-SnO 2 cathodes show excellent cycle and capacity properties than that of NF-SnO 2 cathode. The NST-SnO 2 and NMT-SnO 2 cathodes show discharge capacities of 138.2 and 286.4 mAh g À1 at 500 mA g À1 in the first cycle, the capacities after 50 cycles are 156.7 (113.38%) and 206.2 mAh g À1 (71.99%), which are higher than that of NF-SnO 2 cathode 46.7 mAh g À1 (31.32%). The 69.09 and 118.01 mAh g À1 of NST-SnO 2 and NMT-SnO 2 are discharged at 2000 mA g À1 . The electrochemical mechanism of modified nano-SnO 2 cathodes in MLIBs is also elaborated. The porosity nanomaterials provide a guarantee for high-performance MLIBs and pave way for the construction of advanced SnO 2 cathodes for MLIBs.
To adjust the hydrolysis H2 generation properties of as‐cast Mg–10wt%Ni (Mg10Ni) alloy, intermediate alloys Mg–Ce and Mg–La are introduced to prepare Mg9Ni10Ce and Mg9Ni10La. The H2 generation thermodynamics are investigated based on microstructures, electrochemical polarization properties, and fitted information of hydrolysis curves by Avrami–Erofeev and Arrhenius equations. The results indicate that Ni/La/Ce alloying elements can modify the microstructures of the Mg matrix by forming active phases Mg2Ni and Mg12Ce or Mg17La2, phase boundaries, and α‐Mg solid‐solution. The H2 generation capacities of Mg10Ni, Mg9Ni10Ce, and Mg9Ni10La are 532, 511, and 444 mL g−1 with 0.63, 0.68, and 0.59 conversion yields in 2.5 h at 293 K in NaCl solution. The conversion yields of Mg10Ni, Mg9Ni10La, and Mg9Ni10Ce can be promoted to 0.88, 0.91 and 0.99 at 308 K with 741, 756 and 690 mL g−1 H2, respectively. Due to the high content of eutectic structure and active phase as well as the stronger electrochemical hydrolysis tendency, the modification effect of La is better than Ce. The microstructure–property relationship and thermodynamics built herein can provide an effective strategy to regulate Mg‐based alloys to achieve a high conversion yield and rapid rate by electrochemical hydrolysis H2 generation.
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