[ppzhan Abstract] With the development of mobile terminals such as mobile phones and tablets, polymer lithium-ion batteries are ushered in the peak period of development. As part of their composition, flexible packaging materials have also been included in the development. The polymer battery is backed up using a flexible packaging material to form the battery. The flexible packaging material maintains the performance of the battery by blocking water and oxygen. Therefore, the barrier property of the flexible packaging material has an important influence on the battery.
According to the survey data, as of the end of March 2013, China had a total of 1.146 billion mobile communication service users, an increase of 1.24% over the previous month and an increase of 12.46% over the same period last year. This refers to the use of mobile phones in China alone. It is very large in the world. As a part of the physical composition of mobile phones, the development prospect of polymer lithium ions is very good. Of course, this is based on flexible packaging materials. Steady development on the premise. Therefore, polymer lithium-ion batteries work together with flexible packaging materials.
Polymer lithium-ion batteries are known as the chemical energy source of the 21st century. Polymer lithium-ion batteries have extremely high requirements for flexible packaging technology. Flexible packaging technology has an important impact on battery capacity, cycle life, and the like. The polymer lithium battery is made of aluminum-plastic flexible packaging, which is different from the metal casing of the liquid battery. Once the safety hazard occurs, the liquid battery is easy to explode, and the polymer battery is only gas drum.
The polymer battery is backed up using a flexible packaging material to form the battery. Strictly speaking, it cannot be called “packaging†because in the field of polymer lithium-ion batteries, “soft packaging materials†form batteries with the contents, and the batteries are assembled into batteries. Therefore, “soft packaging materials†can Think of it as an integral part of the battery. However, the materials used are common packaging materials, and they are mainly used to protect the contents. Therefore, people still use it to be called "packaging".
Because flexible packaging materials can be seen as an integral part of the battery, it has a significant impact on the performance of the battery. When the content of water and oxygen in the battery reaches a certain level, the capacity of the polymer lithium ion battery will become smaller, the voltage drop will increase, the charge will not be charged, the electricity will not be discharged, the cycle life will decrease, and the battery may eventually fail. .
The flexible packaging material maintains the performance of the battery by blocking water and oxygen. Therefore, the barrier property of the flexible packaging material has an important influence on the battery. In addition, some organic substances in the soft packaging material may be dissolved in the electrolyte to cause an electrochemical reaction to destroy the performance of the battery; if the electrolyte is swollen by the soft packaging material, the mixing ratio of the electrolyte will be changed, which is detrimental to the performance of the battery.
The development trend of flexible packaging materials is determined by the development trend of polymer lithium ion batteries and the expansion of their application fields. There are two trends in the development of polymer lithium ions: one is the development of batteries in the direction of miniaturization and thinning; the other is the development of large-capacity and high-power charging and discharging. The former requires that the required flexible packaging material develops in a thinner and more flexible direction under the premise of barrier property; the latter requires that the barrier property of the flexible packaging material develops in a higher direction and the degree of interaction with the electrolyte is smaller. Direction development.
These two development trends, the choice of packaging materials, the requirements for packaging composite technology, especially the structural design of packaging materials are higher, because the flexible packaging material is the next quality assurance gateway for battery molding, the impact on battery performance Greatly, in addition to the advancement of active materials and manufacturing processes required for batteries, the development of polymer lithium-ion batteries and the expansion of their application fields will mainly depend on the development of flexible packaging technology and materials.
There are special research institutes for flexible packaging technology for polymer lithium batteries in foreign countries, and only a very small number of people in China are engaged in this research. The research and application of flexible packaging materials should become an important part of the research and production of polymer lithium-ion batteries.
According to the survey data, as of the end of March 2013, China had a total of 1.146 billion mobile communication service users, an increase of 1.24% over the previous month and an increase of 12.46% over the same period last year. This refers to the use of mobile phones in China alone. It is very large in the world. As a part of the physical composition of mobile phones, the development prospect of polymer lithium ions is very good. Of course, this is based on flexible packaging materials. Steady development on the premise. Therefore, polymer lithium-ion batteries work together with flexible packaging materials.
Polymer lithium-ion batteries are known as the chemical energy source of the 21st century. Polymer lithium-ion batteries have extremely high requirements for flexible packaging technology. Flexible packaging technology has an important impact on battery capacity, cycle life, and the like. The polymer lithium battery is made of aluminum-plastic flexible packaging, which is different from the metal casing of the liquid battery. Once the safety hazard occurs, the liquid battery is easy to explode, and the polymer battery is only gas drum.
The polymer battery is backed up using a flexible packaging material to form the battery. Strictly speaking, it cannot be called “packaging†because in the field of polymer lithium-ion batteries, “soft packaging materials†form batteries with the contents, and the batteries are assembled into batteries. Therefore, “soft packaging materials†can Think of it as an integral part of the battery. However, the materials used are common packaging materials, and they are mainly used to protect the contents. Therefore, people still use it to be called "packaging".
Because flexible packaging materials can be seen as an integral part of the battery, it has a significant impact on the performance of the battery. When the content of water and oxygen in the battery reaches a certain level, the capacity of the polymer lithium ion battery will become smaller, the voltage drop will increase, the charge will not be charged, the electricity will not be discharged, the cycle life will decrease, and the battery may eventually fail. .
The flexible packaging material maintains the performance of the battery by blocking water and oxygen. Therefore, the barrier property of the flexible packaging material has an important influence on the battery. In addition, some organic substances in the soft packaging material may be dissolved in the electrolyte to cause an electrochemical reaction to destroy the performance of the battery; if the electrolyte is swollen by the soft packaging material, the mixing ratio of the electrolyte will be changed, which is detrimental to the performance of the battery.
The development trend of flexible packaging materials is determined by the development trend of polymer lithium ion batteries and the expansion of their application fields. There are two trends in the development of polymer lithium ions: one is the development of batteries in the direction of miniaturization and thinning; the other is the development of large-capacity and high-power charging and discharging. The former requires that the required flexible packaging material develops in a thinner and more flexible direction under the premise of barrier property; the latter requires that the barrier property of the flexible packaging material develops in a higher direction and the degree of interaction with the electrolyte is smaller. Direction development.
These two development trends, the choice of packaging materials, the requirements for packaging composite technology, especially the structural design of packaging materials are higher, because the flexible packaging material is the next quality assurance gateway for battery molding, the impact on battery performance Greatly, in addition to the advancement of active materials and manufacturing processes required for batteries, the development of polymer lithium-ion batteries and the expansion of their application fields will mainly depend on the development of flexible packaging technology and materials.
There are special research institutes for flexible packaging technology for polymer lithium batteries in foreign countries, and only a very small number of people in China are engaged in this research. The research and application of flexible packaging materials should become an important part of the research and production of polymer lithium-ion batteries.
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