Sn/Co electrodeposition on Ni substrate as anode and its application in Lithium ion batteries

Sn/Co nano - particles were synthesized in an electrochemical bath containing Na4P2O7 and glycine as complexing agents in order to control the rate of Sn/Co electrodeposition on Nicollector electrode. The electrochemical bath containing Na4P2O7 and glycine concentration of about 500 and 250 mmol.lit-1 has the best condition resulting in the best discharge capacity and cycleability as two main criteria in lithium ion batteries[1]. Also, the pulsed currentcharacteristics such as frequency and density were investigated and 100 Hz and 150 mA.cm-2 respectively, were obtained as the optimum parameters. Discharge capacity of synthesized Sn/Co nano particles was obtained about 720 mA.h.g-1 indicating about 35% increase compared to thesynthesized Sn/Co particles with constant current electrodeposition method. Also, the obtained discharge capacity of was 550 mA.h.g-1 in 20th cycle which showed an appropriate cycleability compared to the Sn/Co film electrode prepared by a constant current electrodeposition. The particles size of coated Sn/Co on collector electrode is resulted from an interplay between the rate of nucleation and growing rate of particles[2].

Keywords:

pulsed current electrodeposition , cycleability , Sn/Co nano particles , complexing agent , discharge capacity