Lithium metal batteries: lithium metal batteries generally use manganese dioxide as a positive electrode material, 18650 pack builder lithium metal or its alloy as a negative electrode material, using the battery's non-hydrolysate.

Lithium ion power battery: lithium ion battery companies generally use lithium alloy for metal composite oxides as positive structural materials, battery manufacturing machine graphite as negative and materials, the use of non-aqueous electrolyte batteries.

Although lithium metal batteries have a high energy density, li ion battery construction they can theoretically reach 3,860 watts/kg. But the enterprise because of its nature research is not enough system stability and we can not charge, so they can not control as a repeated use of power batteries. Lithium-ion battery technology, due to the ability of students to charge repeatedly, has been developed as a major power battery management in society. However, because it matches different elements in different countries, the composition of the positive electrode material has a great impact on the performance of various aspects, resulting in increasing disputes in the industry over the positive electrode material route, so there are advantages and disadvantages for both sides.

A lithium-ion battery is a secondary battery (storage battery) that works by moving lithium ions between the positive and negative terminals. During charging and discharging, Li + is embedded and separated back and forth between the two electrodes: during charging, Li + is separated from the positive electrode and embedded through the electrolyte into the negative electrode, which is in a lithium-rich state, while the opposite is true during discharge.

Lithium batteries are divided into lithium batteries and lithium ion batteries. Mobile phones and laptops use lithium-ion batteries, which are commonly known as lithium batteries. Batteries generally use materials containing lithium as electrodes, which is a representative of modern high-performance batteries. The real lithium battery is rarely used in daily electronic products due to its high risk.

The lithium-ion battery was first developed by SONY in 1990. It involves inserting lithium ions into carbon (petcoke and graphite) to form an anode (conventional lithium batteries use lithium or lithium alloys as the anode). LIXCOO2, LixNiO2, and LIXMNO4 are commonly used as cathode materials, while Lipf6 + diethylene carbonate (EC) + dimethyl carbonate (dMC) is used as electrolyte.

Petroleum coke and graphite as negative electrode materials are non-toxic and provide sufficient resources. Lithium ion embedded in carbon overcomes the high activity of lithium and solves the safety management problems existing in the development of traditional lithium batteries. The positive LixCoO2 can reach the required high cultural level in charge, discharge performance and life, which continuously reduces the cost. In short, the comprehensive system performance of lithium-ion power batteries has been greatly improved. It is expected that lithium-ion battery companies in the 21st century will directly occupy a large market.

Lithium-ion batteries are easily confused with the following by two different batteries:

(1) Lithium battery: lithium metal as a negative electrode.

(2) Lithium-ion batteries: use non-aqueous liquid organic electrolyte.

(3) Lithium-ion polymer batteries: gelatinization of liquid organic solvents with polymers, or direct use of all-solid electrolytes. Lithium-ion batteries are usually made of carbon in the form of graphite.

In 1970, Exxon's M.S. hittingham made the first lithium battery with titanium sulfide as the cathode material and lithium metal as the cathode material. The positive electrode material of lithium battery is manganese dioxide or thionyl chloride, and the negative electrode is lithium. After the battery is assembled, the battery has a voltage and does not need to be charged. Lithium-ion batteries are developed from lithium batteries. For example, the button batteries used in cameras in the past belong to lithium batteries. This battery can also be charged, but the cycle performance is not good, the charge and discharge cycle process is easy to form lithium crystals, resulting in internal short circuit of the battery, so it is generally prohibited to charge this battery.

Illinois institute of technology, university of science and technology, 1982 (theIllinoisInstituteofTechnology) R.R.A garwal and J.R.S elman found lithium-ion technology in China has social embedding the properties of the graphite, the process is quick, and reversible. At the same time, the use of lithium batteries made of different metal lithium, its safety risks are concerned by students, so people began to try to use the characteristics of lithium ion embedded graphite and make their own charging system batteries. The first usable lithium-ion graphite electrode was successfully produced by Bell Laboratories.

Thackeray, J. Goodenough et al. found that manganese spinel is an excellent cathode material with low price, good stability, good electrical conductivity, and good lithium electrical conductivity. Its decomposition temperature is high, and the degree of oxidation is much lower than lithium cobalt, even if there is short circuit, overcharge, but also to avoid the danger of combustion, explosion.

In 1989, anthiram and J.Goodenough discovered that higher voltages could be generated using polymeric anions as positive electrodes.

In 1992, SONY invented a lithium battery with carbon as the negative electrode and lithium compounds as the positive electrode. In the charge and discharge process, there is no lithium metal, only lithium ions, which is the so-called lithium-ion battery. Later, such lithium-ion batteries revolutionized consumer electronics. Such batteries, which use lithium cobalt oxide as a positive electrode material, are still the main power source for portable electronic devices.

In 1996, Paddy and Goodnow discovered that olivine-based phosphates, such as lithium iron phosphate (LiFePO4), are safer than traditional cathode materials, especially at high temperatures and overcharged lithium-ion batteries.

Looking at the history of the development of battery technology in China, it can be clearly seen that the three main characteristics of the development of battery automobile industry enterprises in China's current world are: first, the rapid and rapid development of green ecological batteries, including lithium-ion batteries, nickel-hydrogen batteries, etc.; Second, it is because of the conversion of a battery to a battery, which is in line with the sustainable and continuous development of the economic strategy; Third, the battery needs to be further developed in the direction of small, light and thin. Among commercial rechargeable batteries, lithium-ion batteries have the highest specific energy level, especially polymer lithium-ion batteries, which can effectively achieve the thinning of rechargeable batteries. Because lithium-ion batteries have high volume-specific energy and mass-specific energy, can be charged and pollution-free, and have the three characteristics of the current social development of the battery industry, they have a rapid growth in the study of developed countries. The development of the telecommunications and information services market, especially with the large amount of money used in mobile network phones and notebook computers, has brought huge market opportunities to lithium-ion batteries. The polymer lithium-ion battery system in lithium-ion batteries, with its unique cultural advantages in safety, will gradually replace liquid electrolyte lithium-ion batteries and become the mainstream of lithium-ion batteries. Polymer lithium-ion batteries, known as the "battery of the 21st century", will open up a new era of batteries, and the development and application prospects are also very positive and optimistic.

In March 2015, Sharp partnered with Tanaka Kyoto University to develop a lithium-ion battery that can last up to 70 years. The lithium-ion battery has a volume of 8 cm 3 and can be charged and discharged 25,000 times. Sharp says the performance of lithium-ion batteries remains stable after 10,000 charges and discharges.

Steel shell  Aluminum shell  cylindrical  flexible packaging series:

(1) Positive - the active substance is usually lithium manganese or lithium cobalt manganese oxide, and lithium nickel cobalt manganese oxide (usually used in electric bicycles), or lithium nickel cobalt manganese oxide (usually called terene) or terene plus a small amount of lithium manganese oxide, pure lithium manganese oxide and lithium iron phosphate, which gradually fades due to large volume, poor performance or high cost. The conductive electrode liquid uses electrolytic aluminum foil with a thickness of 10-20 microns.

(2) Diaphragm - a specially shaped polymer film with a microporous structure that allows lithium ions to pass freely, but electrons cannot.

(3) Negative electrode - the active study material is graphite, or carbon with an approximate industrial structure of graphite, and the conductive collector fluid is used by electrolytic copper foil with different thicknesses of 7-15 microns.

(4) Organic electrolyte - dissolved with lithium hexafluorophosphate carbonate solvent, polymer using gel electrolyte.

(5) Battery shell - divided into steel shell (square rarely used), aluminum shell, nickel-plated iron shell (for cylindrical batteries), aluminum-plastic film (soft bag), etc. There is a battery cover, which is also the positive and negative terminal of the battery.

Related Hot Topic

What is a lithium-ion battery's maximum charging voltage?

A lithium iron phosphide battery has a 3.65V full charge voltage and a 3.2V nominal voltage. In other words, based on material and user safety, the potential difference between a lithium-ion battery's positive electrode and negative electrode cannot, in actual use, be greater than 4.2V.