Specific energy, also known as gravimetric energy density, refers to the amount of energy stored per unit mass in a battery. It is measured in watt-hours per kilogram (Wh/kg). Higher specific energy means that a battery can store more energy for its weight, allowing for longer operating times and increased range in portable devices or electric vehicles.
Improving the specific energy of lithium-ion batteries has been a key focus in research and development to enable more efficient energy storage and transportation.
The Factors Influencing Specific Energy
A few of the factors that contribute to this specific energy are:
1. Electrode Materials
2. Electrolyte Optimization
3. Anode Improvements
4. Advanced Cell Designs
The Quest for Enhanced Specific Energy
Scientists, engineers, and researchers worldwide are actively engaged in projects aimed at improving the specific energy of lithium-ion batteries. The data collected and presented in the research conducted by Link S. et al. for the period spanning from 2010 to 2021 clearly illustrates the evident progress and favourable trend in this field.