Synchronous synthesis of a Si/Cu/C ternary nano-composite as an anode for Li ion batteries

Abstract

Commercial micron-sized bulk Si is chemically converted into a nano-sized Si/Cu/C ternary composite as an anode material. The Si particles, Cu crystals, and amorphous carbon are generated synchronously and mixed uniformly.

Si/Cu-Zn(ox)/C composite as anode material for Li-ion batteries

“…Among the electrochemically inactive transition metals, Cu is a better matrix constituent than Ni to increase the electronic conductivity of the electrode material. Cu can be introduced during the synthesis of the composite material as metallic particles [19,20] or from Cubased intermetallics such as Cu 6 Sn 5 [21,22]. In the latter case, the Cu atoms are extruded during the first lithiation to form metallic nanoparticles.…”

Interface Engineering of Silicon/Carbon Thin-Film Anodes for High-Rate Lithium-Ion Batteries

“…Recent endeavors to address this problem focus on scale-down, − hybridization, , and novel structural design. − Typically, volume expansion and pulverization of Si can be effectively relieved, while its feature size scales down to the micro/nanoscale. From zero-dimensional (0D) to two-dimensional (2D), Si nanoparticles, nanowires, , nanotubes, and thin films , present a significant improvement in cycling stability.…”

“…However, the nature of intrinsic low conductivity and huge volume variation (∼400%) during cycling processes, which can substantially reduce its cycling stability and electrochemical performance, turns to be an obstacle for practical applications. 7 Recent endeavors to address this problem focus on scaledown, 8−10 hybridization, 11,12 and novel structural design. 13−15 Typically, volume expansion and pulverization of Si can be effectively relieved, while its feature size scales down to the micro/nanoscale.…”

Cyanosol-enabled ultrafine alloy nanocrystals on graphene as a hybridization matrix for long-life and high-rate silicon anodes

“…Moreover, the co-incorporation of metal and carbon components could achieve synergistic lithium-storage effects toward silicon from M/C dual matrices, and thus, Si/M/C ternary anodes are able to manifest desirable overall electrochemical performance. 17–27…”

“…Up to now, various M/C components have been adopted to hybridize with silicon, including Sn/C, 17,18 Fe/C, 19,20 Co/C, 21,22 Cu/C, 23,24 and Mn/C 25 ones. In these ternary composites, M/C dual components serve as buffering/conducting matrices, boosting the structural stability and charge-transport capability of the Si/M/C anodes.…”