Piezoelectric energy harvesting using ambient vibrations have received substantial research interest in recent past because of its potential of developing self-charging devices. The aim is to recover energy wasted or unused in environment and convert it into electric energy using piezoelectric effect. A wealth of literature exists in which energy harvesters have been studied and optimized to operate over a small frequency interval. But the linear response and narrow frequency operating range of these harvesters have posed challenges to the researchers. Real Money Rummyers have continuously strived in search of structures with non-linear dynamic characteristics and wider operating bandwidths. To this end bistable composite laminates possessing two stable shapes have emerged as promising candidates for developing non-linear broadband energy harvesters. These laminates undergo large strains while transitioning from one stable shape to another with rich non-linear dynamics under the action of dynamic loads. The scope of bistable laminates for energy harvesting could be further expanded by developing efficient techniques for the analysis, incorporating new materials in design for optimum power harvesting. To this end this study will be proposing novel numerical and analytical models for the analysis of energy harvesters. Design of harvesters will be taken to another level where the host structure will be replaced by variable stiffness, hybrid symmetric and smart composite laminates in place of conventional straight fibre laminates. By using different laminate options in place of straight fibre laminates, one can alter the stiffness of bistable energy harvester resulting in the reduction of shape transition requirements which is advantageous for energy harvesting. Experimental studies on energy harvester using bistable laminates will be carried out to investigate the energy harvesting performance and to validate the proposed numerical and analytical frameworks. Parametric study will be carried out to identify the critical parameters that influence the energy harvesting potential of bistable laminates. The proposed study will enable the design of a prototype of an efficient energy harvester that can be used for daily life applications.