I. What is an environmentally friendly battery?
Environmentally friendly batteries refer to a type of high-performance, pollution-free battery that has been put into use or is under research and development in recent years. This category includes widely used nickel-metal hydride batteries and lithium-ion batteries, as well as mercury-free alkaline zinc-manganese primary batteries and rechargeable batteries that are being promoted for use, and lithium or lithium-ion plastic batteries and fuel cells that are under research and development. In addition, solar cells (also known as photovoltaic power generation), which are widely used and utilize solar energy for photoelectric conversion, can also be included in this category.
With battery pollution becoming increasingly serious, the emergence of environmentally friendly batteries has reduced pollution from battery use. Several types of environmentally friendly batteries have been put into use in recent years, while others are still under research and development. These are high-performance, pollution-free batteries. Environmentally friendly batteries include nickel-metal hydride batteries, lithium-ion batteries, alkaline zinc-manganese batteries, lithium-plastic batteries, and fuel cells. Nickel-metal hydride batteries were gradually industrialized in the early 1990s and were developed relatively early. Their initial development aimed to replace toxic and carcinogenic nickel-cadmium batteries. Although an early development, they still hold approximately 50% market share in mobile phones in Europe and America. Lithium-ion batteries have superior performance in all aspects and significantly exceed the specific energy of nickel-metal hydride batteries. They are also a later-developed environmentally friendly battery, experiencing extremely rapid growth in just a few years from 1993 to 2000.
Alkaline zinc-manganese batteries, a type of dry cell battery, have a higher capacity than other dry cell batteries of the same size and can discharge at high currents. The use of mercury-free zinc powder this year has made them an environmentally friendly option. Lithium-ion plastic batteries, a new type of battery using conductive polymers as electrolytes, are lightweight, can be easily reshaped, and offer better safety. Fuel cells, on the other hand, are devices that directly and continuously generate electricity using fuel and oxidant. These devices are not only highly efficient but also produce no polluting gases. Due to the global emphasis on environmental protection, environmentally friendly batteries are becoming a trend in the battery industry.
II. What are some examples of environmentally friendly batteries?
Currently, with the continuous improvement of energy technology, the production of environmentally friendly and energy-saving power sources is an inevitable trend. Green and environmentally friendly batteries refer to a type of high-performance, pollution-free battery that has been recently put into research and development. The most common rechargeable batteries on the market include alkaline batteries, nickel-metal hydride batteries, and lithium-ion batteries.
Currently, mercury-free alkaline zinc-manganese primary batteries and rechargeable batteries that are being promoted and used, as well as lithium or lithium-ion plastic batteries and fuel cells that are under research and development, are all environmentally friendly batteries. The most technologically advanced are solar cells that are currently widely used and utilize solar energy for photoelectric conversion. This energy source was developed by Sanyo in Japan and has been vigorously promoted in recent years. It will also be the most ideal energy source in the future.
Nickel-metal hydride (NiMH) batteries utilize rare-earth alloys or TiNi alloys as the negative electrode active material, replacing the carcinogenic cadmium. This not only makes the new battery a green and environmentally friendly option but also increases its specific energy by nearly 40%. This type of battery was gradually industrialized in the early 1990s and was first used in mobile phone batteries. Although its dominant position in mobile phones has been gradually replaced by lithium-ion batteries, lithium-ion batteries offer superior performance in all aspects. They are primarily composed of a reversibly lithium-intercalated metal oxide as the positive electrode and an organic electrolyte, with a working voltage of 3.6V. Therefore, one lithium-ion battery is equivalent to three nickel-cadmium (NiCd) or nickel-metal hydride (NiMH) batteries. Given these advantages, its production and usage have grown at an extremely high rate in just a few years since 2000.
Environmentally friendly alkaline batteries: These batteries have a higher capacity than ordinary dry cell batteries of the same size and have the ability to discharge with a large current. With continuous development, mercury-free zinc powder has been applied recently, making these batteries a green battery and the mainstream product among primary batteries. At present, alkaline zinc-manganese dry cell batteries are still the most commonly used power source for pagers.
Besides the types mentioned above, there are also lithium plastic batteries, fuel cells, zinc-manganese dry batteries, etc. These batteries are used in different fields based on their different product advantages. Because batteries themselves still have many hidden dangers, they will eventually be phased out. There are also reports that new environmentally friendly energy sources are being developed, such as air batteries and zinc batteries. These batteries are still undergoing further certification. Currently, the energy source that industry professionals value most is lithium-ion batteries.
