Key Characteristics Analysis of Microporous Copper Foil in High Power Battery Applications

With the rapid development of technology, high-power batteries are becoming increasingly widely used in electric vehicles, energy storage systems, and portable electronic devices. In these applications, the performance and reliability of batteries are crucial.Micro porous copper foilAs a new type of current collector material, it has shown great potential for application in the field of high-power batteries due to its unique structure and performance advantages. This article will delve into the characteristics of microporous copper foil that need to be focused on in high-power battery applications, and cite relevant data and comparisons, taking the microporous copper foil of Advanced Institute (Shenzhen) Technology Co., Ltd. as an example for analysis.

1、 High conductivity performance

The surface area of microporous copper foil is larger than that of ordinary copper foil, therefore it has higher conductivity. This characteristic is crucial for high-power batteries as it directly affects the charging and discharging efficiency and energy density of the battery.Advanced Institute (Shenzhen) Technology Co., LtdThe microporous copper foil, through precise mechanical processing technology, optimizes its microporous structure while ensuring the physical and chemical properties of the foil material, further enhancing its conductivity. According to testing, its conductivity is about 5% -10% higher than that of ordinary copper foil, reaching 6.0 × 107 S/m, significantly improving the charging and discharging efficiency of the battery.

2、 Good thermal diffusivity

In high-power batteries, a large amount of heat is generated inside the battery. If it cannot be dissipated in a timely manner, it can lead to an increase in battery temperature, which in turn affects the performance and lifespan of the battery.Micro porous copper foilWith its good thermal diffusivity, it can effectively dissipate the heat inside the battery and maintain it within a suitable operating temperature range. According to comparative tests, using the microporous copper foil battery from Advanced Institute (Shenzhen) Technology Co., Ltd., the battery temperature is reduced by about 5 ℃ -10 ℃ compared to ordinary copper foil batteries during high-power discharge, significantly improving the stability and service life of the battery.

3、 Weight reduction and energy density improvement

Micro porous copper foil can significantly reduce the weight of the foil material without sacrificing physical properties by introducing tiny pore structures. This is an important advantage for high-power batteries, as the reduction in weight can directly increase the energy density of the battery. Meanwhile, the presence of pore structure can also increase the contact area between the positive and negative electrode materials and the foil material, thereby improving the charging and discharging efficiency of the battery. According to testing, for foil materials of the same specifications, microporous copper foil with a porosity of 17% reduces weight by 17%; Under the same surface density, batteries using microporous copper foil can increase energy density by 5% -10%.

4、 Reduce battery internal resistance and improve rate performance

The introduction of microporous copper foil can effectively reduce the internal resistance of the battery. Due to the presence of pore structure, the diffusion path of lithium ions has shifted from two-dimensional direction to three-dimensional all-round penetration, thereby shortening the distance of lithium ion migration and improving conductivity efficiency. This characteristic is particularly important for high-power batteries, as it directly affects the rate performance and fast charging and discharging ability of the battery. According to testing, using advanced technology from Advanced Institute (Shenzhen) Technology Co., LtdMicro porous copper foilThe internal resistance of the battery can be reduced to below tens of milliohms, and the rate performance of the battery has also been significantly improved, supporting higher charging and discharging rates.

5、 Improving electrolyte infiltration and enhancing surface adhesion of battery cells

The pore structure of microporous copper foil also helps to improve the infiltration efficiency of battery electrolyte. In conventional foil lithium batteries, the electrolyte diffuses and infiltrates from the longitudinal periphery to the center; The introduction of microporous copper foil enables the electrolyte to permeate and diffuse in a three-dimensional manner, thereby eliminating the problem of some battery electrode centers not being infiltrated. In addition, the material between the pores can also form an "I-shaped" interlocking state, enhancing the surface adhesion of the foil and reducing the probability of electrode detachment. According to testing, usingAdvanced Institute (Shenzhen) Technology Co., LtdThe battery with microporous copper foil has an electrolyte infiltration efficiency increased by more than 20% and can ensure 100% infiltration consistency; At the same time, the probability of electrode detachment is significantly reduced.

In summary, in high-power battery applications, the high conductivity, good thermal diffusivity, weight reduction and energy density improvement, reduction of battery internal resistance and enhancement of rate performance, as well as improvement of electrolyte infiltration and enhancement of surface adhesion of microporous copper foil are all noteworthy characteristics. The microporous copper foil of Advanced Institute (Shenzhen) Technology Co., Ltd. has shown great potential for application in the field of high-power batteries due to its excellent performance and stable quality. With the continuous advancement of technology and further cost reduction, microporous copper foil is expected to become the mainstream current collector material in the future high-power battery field.

The above data is for reference only, and specific performance may vary due to production processes and product specifications.