Why does the mobile phone lithium-ion battery explode?

 Lithium battery anode material description

The negative electrode of a lithium-ion battery is made by mixing the negative active material carbon material or non-carbon material, binders, and additives to form a paste glue that is evenly smeared on both sides of the copper foil, dried, and rolled. Several layers of graphene (CAS 1034343-98-0) are two-dimensional carbon nanomaterials composed of carbon atoms and sp² mixed orbital hexagonal honeycomb lattice. Few graphene layers are one of the strongest materials known, but they also have good toughness and can be bent.

A lithium-ion battery is a kind of secondary battery (rechargeable battery), which mainly relies on the movement of lithium ions between the positive electrode and the negative electrode to work. During charge and discharge, Li+ intercalates and deintercalates back and forth between the two electrodes: during charging, Li+ is deintercalated from the positive electrode and inserted into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state; the opposite is true during discharge.

The working principle of mobile phone batteries: mobile phone batteries are generally lithium-ion batteries. Lithium-ion batteries consist of a positive electrode, a negative electrode, a diaphragm, and an electrolyte. The positive and negative electrodes are immersed in the electrolyte. The lithium ions move between the positive and negative electrodes using the electrolyte as a medium to realize the charge and discharge of the battery. To avoid short-circuit between the positive and negative electrodes through the electrolyte, a separator is required to separate the positive and negative electrodes.

The culprit of the explosion

To increase the energy density of batteries, mobile phone manufacturers use thinner membranes to store more electrical energy in a limited volume. The reduction in thickness increases the difficulty of the production of the separator and is easy to cause quality defects so that the separator cannot effectively isolate the positive and negative electrodes, which in turn causes the short circuit and explosion of the battery.

Graphene is used in battery anode materials, semiconductor devices, transparent displays, sensors, capacitors, resistors, etc.

Lithium battery anode materials have mastered the lifeblood of power battery safety. Among the anode materials for lithium-ion batteries, in addition to graphitized mesophase carbon microspheres (MCMB), amorphous carbon, silicon or tin also account for a small market share, and natural graphite and artificial graphite account for more than 90% of the market share of anode materials. . According to the statistics of the anode material market in 2011, the total amount of global anode material production and application reached 32,000 tons, a year-on-year increase of 28%. Among them, natural graphite and artificial graphite anode materials account for 89% of the market share, and with the growth of electronic products in recent years, especially the application of lithium-ion batteries in the field of mobile phones and tablet computers continues to grow. In recent years, the production capacity of materials for the corresponding positive and negative electrodes of batteries has increased rapidly. From 2009 to 2011, graphite anode materials have maintained an annual growth rate of more than 25% for three consecutive years. Lithium battery anode material price: The price of lithium battery anode material varies randomly with production cost, transportation cost, international situation, exchange rate, and market supply and demand. Tanki New Materials Co. Ltd aims to help all industries and chemical wholesalers find high-quality, low-cost nanomaterials and chemicals by providing a full set of customized services. If you are looking for anode materials for lithium batteries, please feel free to send the latest price inquiries.

Lithium battery anode material supplier: As a global supplier of lithium battery anode materials, Tanki New Materials Co., Ltd. has extensive experience in the performance, application, and cost-effective manufacturing of advanced engineering materials. The company has successfully developed a series of powder materials (including oxides, carbides, nitrides, single metals, etc.), high-purity targets, functional ceramics, and structural devices, and provides OEM services.