| The electrochemical and thermal characteristics of lithium-ion battery materials has been investigated to obtain higher energy, higher power, better cyclic performance, and thermal stability. The LiFePO4 positive electrode was optimized to reduce the inactive materials (e.g., carbon black and polymer binder) to increase the energy density. With characterizing the relation between the electrical conductivity and impedance, the optimum composition was founded by characterizing the energy and pulse-power density. A silicon/graphene composite anode has been investigated to improve the cyclic performance by controlling the effect of the binder composition and fluoroethylene carbonate (FEC) additive concentration. The thermal stability of the silicon/graphene composite anode also has been characterized by various FEC concentrations to examine the modified solid electrolyte interphase (SEI) layer.;Zr-doped In2O3, as an alternative non-carbon electrocatalyst support in the proton exchange membrane (PEM) fuel cells, has been developed by applying various synthesis methods. Under the testing protocol, Zr-doped In2O3 had better durability as compared to commercial carbon support. The physical properties have been characterized to optimize the electrochemical stability of Zr-doped In2O3 by tuning the dopant concentration. |
