Which of the following is considered an efficient storage of energy?

• A. Incandescent light bulbs
• B. Coal-fired power plants
• C. Lithium-ion batteries
• D. Lead-acid batteries

Answer: (C)

Verified step by step guidance

1. Understand the concept of energy storage: Energy storage refers to capturing energy produced at one time for use at a later time. Efficient energy storage systems are those that can store a large amount of energy relative to their size and weight, and can release it quickly when needed.
2. Identify the types of energy storage mentioned: The options given are incandescent light bulbs, coal-fired power plants, lithium-ion batteries, and lead-acid batteries. Among these, only lithium-ion batteries and lead-acid batteries are actual energy storage devices.
3. Compare the efficiency of lithium-ion batteries and lead-acid batteries: Lithium-ion batteries are known for their high energy density, meaning they can store a large amount of energy in a small space. They also have a high charge/discharge efficiency and a long cycle life. Lead-acid batteries, while cheaper, have lower energy density and shorter cycle life.
4. Consider the application and advantages of lithium-ion batteries: Lithium-ion batteries are widely used in portable electronics, electric vehicles, and renewable energy systems due to their efficiency, lightweight, and ability to hold charge for extended periods.
5. Conclude why lithium-ion batteries are considered efficient: Based on their high energy density, long cycle life, and efficiency in storing and releasing energy, lithium-ion batteries are considered an efficient storage of energy compared to the other options listed.