Inventory of the Technology Route of Seven Major Lithium Battery Enterprises in Japan

Although Japan is on the decline in the global market for lithium, it has long dominated the high-end market for lithium, and its technology is a bellwether for the industry as a whole.

Details of the technical routes of each enterprise

1, Panasonic-Sanyo Electric

Positive materials

The research and development of solid solution materials such as lithium manganate doped nickel, aluminum and other elements are studied as positive electrode materials for batteries. At present, the positive polar materials that have been developed include lithium nickel-cobalt manganese acid and lithium nickel-cobalt aluminate, and have been applied on a large scale.

In addition, in order to solve the problem of low thermal stability and safety caused by nickel oxide, Nano coating treatment was carried out on the surface of positive electrode material.

Negative material

At present, carbon materials are mainly used, but at the same time, Silicon alloy negative electrode materials are actively developed and have been partially applied.

2, NEC-AESC

By doping nickel, aluminum and other elements to improve the low energy density of lithium manganate material, the route is actually similar to Panasonic. However, NEC looks bolder and is developing materials that are twice the capacity of nickel-drilling alloys to replace manganese materials.

At present, the application of this new type of cathode material has solved the problem of battery durability. NEC is actively developing electrode materials dedicated to powered lithium batteries and has now been implemented.

3, Hitachi

Negative material

There are currently two routes for the development of Hitachi negative materials:

1. Improvement based on carbon materials;

2. Develop a mixture of Silicon alloy materials and carbon materials SiO-C.

At the same time, a new type of copper foil with high elastic limit stress and excellent processing performance was developed as electrode material.

diaphragm

On the separator side, a ceramic separator material having a high temperature resistance of 200 ° C has been developed, and plate-shaped inorganic fine particles are coated on a porous film made of a general polyolefin (Polyolefin), and the separator material has been put to practical use.

4, Toshiba

Toshiba mainly improves the energy density of the battery by increasing the particle density of the positive material. In order to optimize the performance of manganese titanium batteries, Toshiba uses a high-burning electrolyte and a diaphragm with excellent heat resistance.

5, British time

The British company is firmly on the lithium manganese acid route, and its lithium battery technology level is in the leading ranks among all Japanese companies. At present, the power battery product data provided by Yingnaishi is good, but it still needs to be tested in mass production.

6, GS Yuasa

GS soup is actively advancing on the two routes of lithium manganese acid and lithium iron phosphate. The main products of lithium manganese acid are EH6, LEV50, and the main products of lithium iron phosphate are LEV25 and LIM40.

7, Sony

While Sony is developing lithium iron phosphate batteries, it is also actively developing power batteries for lithium cobalt + tin alloy materials. Sony's approach is to "process 0.1 to 1 PM thick coating" on the particle surface of lithium cobalt acid. Positive materials are made of a mixture of cobalt tantalum and ternary materials, while ceramic diaphragm is used to improve safety.

On February 15, 2017, Sony Group announced that it officially transferred its battery business to Murata Manufacturing Co., Ltd. for 17.5 billion yen (about 1.1 billion yuan).

The page contains the contents of the machine translation.