SYNERGISTIC EFFECT OF 3D CURRENT COLLECTOR STRUCTURE AND NI INACTIVE MATRIX ON THE ELECTROCHEMICAL PERFORMANCES OF SN-BASED ANODES FOR LITHIUM-ION BATTERIES

A three-dimensional (3D) architecture design of the battery electrodes is believed to enhance the energy and power densities of conventional lithium-ion batteries. In this paper, we report a unique 3D architecture anode fabricated by electrodeposition of ultrathin Ni3Sn4 intermetallic alloy onto a commercially available nickel foam current collector from an aqueous electrolyte. Along with 3D nickel foam, planar (2D) copper current collector was also electrodeposited at the same deposition conditions to compare the effect of architecture. The X-ray diffraction results obtained from three-dimensional and planar anode electrodes indicated that the main phase of electrodeposited alloys for both substrates was Ni3Sn4. The designed three-dimensional electrode demonstrated a high discharge capacity of 843,75 mAh g−1 during initial cycles and an improved cycle performance over 100 cycles in contrast with the same alloy electrodeposited onto planar substrate. The high surface area of the electrode and short Li+-ions diffusion paths along with suppression of volume expansion provided by the proposed 3D structure and Ni inactive matrix play a key role in improving the performance of the electrode

Electrodeposited Ni-Sn intermetallic alloy electrode for 3D sulfur battery

Abstract 3D architecture appeared to be a promising design to enhance the performance of the Lithium-ion batteries by shortening the lithium ion diffusion path and increasing the energy density per unit area. In this paper, we report preliminary results of facile electrodeposition of intermetallic tin-nickel alloy from electrolyte solution onto 3D structured nickel foam for 3D lithium-sulfur battery. The coated films were characterized for their morphologies, structural and electrochemical properties. Scanning electron microscope images revealedthin and homogenous film while XRD revealed the expected phase of intermetallic alloy Ni3Sn4. The electrochemical activity of the film showed to be a promising start to be used as an anode material and needs further works to be optimized

Three-dimensional Ni3Sn4 Negative Electrodes for Lithium-Ion Batteries [Article]

https://www.researchgate.net/publication/326265325_Three-dimensional_Ni3Sn4_Negative_Electrodes_for_Lithium-Ion_BatteriesThree-dimensional alloy based Ni3Sn4 negative electrodes were fabricated by simple electrodeposition technique on a mesoporous nickel foam substrate to improve the capacity and cyclability of Ni3Sn4 anodes for lithium-ion batteries. The combination of thin film geometry with three-dimensional foam structure is aimed to optimize the ionic/electronic current paths, and to accommodate the mechanical stresses induced by the volume changes in the electrode during repeated cycling. The surface morphology of the obtained Ni3Sn4 alloy electrodes was characterized by scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy. X-ray diffraction analysis was performed to characterize the phases and possible impurities present in the alloy. The electrochemical features of the electrodes were investigated by cyclic voltammetry and galvanostatic charge-discharge test experiments. Obtained results showed that the as-prepared three-dimensional Ni3Sn4 anodes are capable of providing satisfactory lithium storage and promising cycling performance