The Development History of Lithium Batteries

The Leyden jar, invented by Dutch scientist Pieter van Musschenbroek in 1745, may trace its roots back to the early days of battery devices. Technically, this was a basic capacitor that had two metallic plates separated by an insulator, with the upper metal rod serving to store and release the charge. The Leyden bottle, which used a metal ball, could store or release electric energy internally with ease. While the principle and preparation of this bottle were simple, its self-discharge phenomenon was significant. Typically, it took a few hours to a few days for the battery to be completely discharged. Nevertheless, the Leyden bottle's arrival marked a revolutionary phase in the study of electricity. If you're interested, you may quickly construct one of these at home, but recall that it has inherent defects due to its simple principle.

Leyden jar

In the late 18th century, Luigi Galvani, an Italian scientist, made a remarkable discovery that would later be recognized as a groundbreaking moment in the study of electricity. Through his experiments with frog legs and the use of zinc and copper wires, Galvani observed the twitching of the frog legs, which led him to propose the concept of "bioelectricity." This concept suggested that the movement was a result of electrical impulses within the frog's body.

However, Alessandro Volta, another prominent Italian scientist of the time, opposed Galvani's theory. Volta believed that the twitching of the frog legs was not due to the frog itself but rather the metals used in Galvani's experiments. To disprove Galvani's notion, Volta came up with an ingenious invention known as the voltaic pile.

The voltaic pile was constructed by stacking alternating layers of zinc and copper discs, which were separated by pieces of cardboard soaked in saltwater. This invention served as a prototype for the first chemical battery ever proposed. Volta's ingenious creation aimed to generate a current that would replicate the twitching of the frog legs observed by Galvani, thus supporting his own theory that the phenomenon was solely due to the metals' effects.

Through their opposing viewpoints and innovative experiments, both Galvani and Volta contributed immensely to the field of electricity and sparked an ongoing scientific debate. Galvani's discovery of bioelectricity and Volta's invention of the voltaic pile laid the foundations for further advancements in understanding electrical phenomena and paved the way for future discoveries in the realm of electromagnetism.

voltaic pile

The invention of the simple electrochemical reaction between two metals has paved the way for the development of various batteries that have revolutionized the operation of small electronic devices and automobile engines. However, their energy density is still not enough for portable applications like mobile phones and laptops. The energy density of a battery refers to the amount of energy it can store per unit mass or volume. This has led to the demand for batteries with higher energy densities, which is vital for the growth of portable electronics. Fortunately, lithium, the lightest metal in the periodic table, has been identified as the key element that could increase battery energy density significantly. This has led to the development of lithium-ion batteries that have been used in portable electronics like smartphones, laptops, and tablets. In conclusion, the energy density of a battery is a crucial factor that affects its usefulness, and the search for better energy-density batteries remains an essential aspect of battery research.

It's important to compare the energy density of different battery systems before making a decision on which one to use. Energy density refers to the amount of energy stored in a battery per unit volume or weight. A battery with a higher energy density will provide more power per unit volume or weight, which is important in applications where space and weight are limited.

Lithium-ion batteries have the highest energy density among rechargeable battery systems, making them ideal for use in smartphones, laptops, and electric vehicles. They can store up to 150 watt-hours per kilogram, which is almost three times higher than that of lead-acid batteries.

Lead-acid batteries, on the other hand, have a lower energy density but are cheaper and more durable. They are commonly used in forklifts and standby power systems.

Nickel-metal hydride batteries have a lower energy density than lithium-ion batteries but are still used in some applications where cost is a concern, such as in hybrid cars and power tools.

Overall, the choice of battery system depends on the specific application and trade-offs between energy density, cost, and durability.

It is fascinating to note that electric vehicles were actually invented before internal combustion engine vehicles. However, their progress was hindered by the slow advancement of battery technology, leading them to be overshadowed in history. The resurgence of electric vehicles in recent years can be attributed to the significant development of lithium-ion batteries. In this regard, the contributions of three Nobel Prize-winning chemists have been instrumental. M. Stanley Whittingham and John B. Goodenough played pivotal roles in revolutionizing battery technology, leading to groundbreaking applications such as lightweight smartphones and laptops. In the 1960s, French scientist Jean Rouxel and German scientist Robert Schroeder delved into the reversible intercalation and deintercalation reactions of lithium ions in layered sulfides. This early exploration laid the foundation for understanding the concept of "embedded" reaction electrodes, where lithium ions can stably penetrate the crystal structure to accomplish ion and electron storage. The 1970s oil crisis prompted Exxon, the oil giant at the time, to seek alternatives to fossil fuels, emphasizing the development of battery energy storage technology. Whittingham became part of Exxon during this period. Leveraging his research on superconducting materials in condensed matter physics, he discovered that potassium ions could intercalate reversibly into tantalum disulfide. Further advancements led to the discovery of layered titanium disulfide (TiS2), which offered higher energy density and exemplified the concept of embedded batteries.