Linsen Zhang

Synthesis and electrochemical properties of SrWO4/graphene composite as anode material for lithium-ion batteries

SrWO4/graphene composite was synthesized via a sol–gel method. The morphology and structure of the products were analyzed by SEM, TEM and XRD. The electrochemical performances of SrWO4/graphene composite were investigated by galvanostatic charge/discharge method, cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The results showed that the first cycle of the reversible specific capacity of SrWO4/graphene composite can reach to 575.9 mAh g-1 at 50 mA g-1. The charge/discharge cycling study indicates that the SrWO4/graphene composite was provided with excellent cycle performance and outstanding rate capability.

Application of Na2CO3 Additive in Graphite Anode for Commercial Lithium-Ion Batteries

The electrochemical performances of the commercial liquid-state Al-plastic film lithium-ion batteries with Na 2 CO 3 in graphite electrode were studied by cycling performance, rate capability, internal resistance, low temperature performance, thermal stability, etc. It was found that the cycle performance of the batteries was successfully improved by pretreatment of graphite electrode with Na 2 CO 3 solution; especially for NalO, the capacity retention was more than 98% up to 400 cycles. However, the discharge capacity and rate capability decreased compared to the battery without Na 2 CO 3 , but not seriously.