Electrochemical Performances of the Sn-Cu Alloy Negative Electrode Materials through Simple Chemical Reduction Method

Abstract

Sn-Cu alloy powders were prepared via a simple chemical reduction method for the negative electrode materials in lithiumion batteries. The addition of Cu can suppress the growth of Sn particles during synthetic process. Furthermore, the Cu also acts as a matrix phase against the volume change during cycling. With increasing amount of the Cu, a stable Cu 6 Sn 5 phase formed in the Sn-Cu alloy and its cycle performance greatly enhanced depending on the Cu content. To promote the generation of the Cu 6 Sn 5 phase, the synthesis temperature is raised to 60-100 o C from the ambient temperature. The Sn-Cu alloy powders prepared at elevated temperatures showed remarkable cycle performances. The Sn-Cu alloy powder obtained at 60 o C exhibited a significantly high volumetric capacity of over 2,000 mAh/cc at the 50th cycle.

Boron Nitride Nanosheets Reinforced Thermoplastics Nanocomposites for Thermal Management Applications: A Mini Review

“…Table 3 shows the details of the mechanical and thermal properties of covalently modified BNNs filled polymer nanocomposites. [7,12,14,26] Han et al [10] incorporated OH functionalized BNNs in the PS matrix using the in situpolymerization method. The incorporation of 12 wt.% of OH functionalized BNNs in the PS matrix shows a 500% enhancement in through-plane thermal conductivity with a slight reduction in mechanical properties.…”

“…Thus, the state of dispersion and purity of surface lattice of BNNs can enhance the thermal properties significantly with application in thermal interconnects. [10] Oh and Kim [26] incorporated vinyltriethoxysilane (VTES) modified BNNs in polymethylmethacrylate (PMMA) matrix processed using the in situ-polymerization method. The 70 wt.% loading of VTES modified BNNs in the PMMA matrix shows improvement in through-pane thermal conductivity by 1710%.…”

Highly Thermally Conductive Yet Electrically Insulative Polycarbonate Composites with Oriented Hybrid Networks Assisted by High Shear Injection Molding

“…The testing voltage was 100 V. Dielectric measurement was performed over a frequency range of 10 1 -10 6 Hz by a Novocontrol Concept 50 system which was equipped with an Alpha impedance analyzer (Novocontrol Technologies GmbH & Co. KG, Germany). [32][33][34][35][36][37][38][39][40][41] d) Schematic diagram of heat conduction mechanism.…”

“…b) The enhancement of 𝜆 for PC/BN and PC/BN/CNT composites when compared with pure PC. c) A comparison of 𝜆 reported in this work with literature values in relation to filler content [32][33][34][35][36][37][38][39][40][41]. d) Schematic diagram of heat conduction mechanism.…”

Evaluation of thermal conductivity and esthetic quality of denture base resin composites with acrylic polymer and nanodiamonds

“…Boron nitride and silicon nitride are also used to enhance the thermal conductivity of polymers. [5][6][7] The colors of their treated polymers are white and gray for BN and Si 3 N 4 , respectively; hence, this treatment can be used to avoid the problem of blackening due to CNTs. However, their thermal conductivities lie in the range of 200-300 W m À1 K À1 and 100-400 W m À1 K À1 for BN and α/β-Si 3 N 4 , respectively, [8][9][10] which are inferior to that of CNTs.…”