What are the examples of energy storage molecules?

There are two main types of energy storage molecules – long-term and short-term. 

ATP or Adenosine 5'-triphosphate is the most abundant short-term energy storage molecule in cells. It is composed of a nitrogen base (adenine), three phosphate groups, and a ribose sugar. 

Proteins, lipids, carbohydrates, and nucleic acids are the most common long-term energy storage molecules in cells. All four are organic compounds and are much larger in size than ATP molecules. 

Energy is stored in the chemical bonds of energy storage molecules and is released when these chemical bonds are broken.