Lithium-ion battery is closely related to the safety and material properties

At present lithium-ion batteries have become the basic equipment supply,such as xps m1730 battery phones, laptop computers and other mobile electronic devices, but also has begun to apply to light electric vehicles and hybrid electric vehicles. However, due to rapid demand growth ,the cost of lithium-ion batteries become increasingly prominent, due to the improvement of energy density batteries, battery safety accidents have also been reported.

Using a variety of ways to increase security

the safety of the battery is involved in battery material, battery for Canon LP-E5 design, manufacture and application in many aspects, simply changing the cathode material can not completely guarantee the safety of the battery. Only the main material is necessary to carefully select the anode material, electrolyte and battery separator, such as a lithium-ion battery anode materials are carbon materials, metal oxides and alloys, graphite material is still today a major lithium-ion battery anode material, However, its safety performance is lower than the hard carbon materials, while the spinel lithium titanate anode material has a higher security. it is to improve the safety of lithium-ion Sony NP-FC11 batteries techniques to use resistant and higher temperatures ,new electrolyte membrane and processing of flame retardants.

to Affect the safety of lithium-ion batteries is a major factor in battery,Canon NB-4L electrode materials, electrolytes and manufacturing processes and use conditions. lithium-ion battery weighing of a cell phone is about 20 grams, the basic requirement is that the probability of security incidents occurred less than one in a million.As the battery capacity increases, the possibility of security incidents significantly increase . Therefore, lithium-ion batteries are made into the power battery ,its safety performance must be improved , the the single cell is greater , asking for security indexes also higher. Such as the commonly used lithium cobalt oxide and graphite as a lithium-ion Nikon EN-EL8 battery anode material for the positive, the battery large-scale post-licensure safety will not be guaranteed.

when China started to carry out research and develo lithium-ionFujifilm NP-95 battery electric vehicles, there have been a number of explosions and burning accidents, one of the main reason is that the lithium cobalt oxide are usually used as cathode material for batteries.Then search for alternative cathode material for lithium cobalt oxide to address the security issues is the top priority issuefor driving force-type lithium-ion battery R & D .Japan's mass-produced lithium manganese battery for Fujifilm NP-120 capacity is small monomer, such as publicly reported for the 3000 Tokyo Electric Power car battery is 216 13Ah lithium manganese batteries.

safety of Lithium iron phosphate as cathode is more better

On the cathode, the lithium iron phosphate (LiFePO4) Charge-state thermal stability is high ,oxidation capacity of the electrolyte is low, it is with better security, and can be used to make a larger battery,Sony NP-QM71D.LiFePO4 theoretical capacity is 170 mAh / g, relative to the lithium metal ,voltage is 3.5V, if it is made into materials, the actual reversible capacities is greater than 160 mAh / g. Compared with other materials, lithium-ion in the chemical diffusion coefficient of LiFePO4 is lower ,electronic conductivity at room temperature is far below that of other cathode materials, to enhance the material properties and the realization of applications by reducing the material size, coated with conductive agent means ,it can bring the defect of low density, the volume is too large and electrolyte battery for JVC BN-V428 usage is more.

The first synthesis of lithium iron phosphate(it is the important materail of battery,JVC BN-V408) way is solid-phase reaction of JB Goodenough. This method is simple , convenient, and easy to operate,disadvantage is the longer cycle and it is difficult to control the stability of the batch from synthetic products. How to to prevent the oxidation of divalent iron is the synthesis of critical control points in the heat treatment and powder processing. There are a lot of R & D team to develop the carbon-thermal reduction method, co-precipitation, hydrothermal method, spray pyrolysis method.

Compared to other lithium battery for , Kodak KLIC-7002 material, lithium iron phosphate is still very young. Some people say that the battery used in electric tools, it was said that it would apply to electric bus batteries, the initial opening up is the need to be encouraged.

Japan has a monopoly in the field of lithium-ion Kodak KLIC-7003 battery, famous companies have built large-scale lithium-ion battery production line ,such as Sony, Sanyo Electric, Matsushita Battery, NEC and others , but most manufacturers in addition to maintaining and expanding the production of the original brand, all of them is using their own advantages to develop lithium-ion battery of new products. Overall, Japan remains the leading countries power battery for Kodak KLIC-8000technology, its power batteries and their mass production of key materials technology has matured, the performance has almost meet the demand for electric vehicles.