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Advantages and disadvantages of graphite anode materials for lithium ion batteries

2020-07-02 13:56

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Advantages and disadvantages of graphite anode materials for lithium ion batteries. The energy density of lithium ion battery depends on the anode material to a large extent. From the commercialization of lithium ion battery to now, the anode material used is the most mature and the most widely used is carbon material, among which the most important one is still graphite. When graphene is directly used as anode material for lithium batteries, it has very considerable electrochemical properties.

 

Advantages and disadvantages of graphite anode materials for lithium ion batteries

 

In real life, in addition to graphite can be used to produce refractory materials, wear-resistant lubricating materials, high temperature metallurgical materials, or the mainstream commercial lithium anode material.

 

Advantages of graphite anode material for lithium ion battery :(1) graphite is widely sourced and abundant in reserves; (2) the vibration density is higher after modification; (3) stable electrochemical performance; (4) the actual specific capacity density can be close to the theoretical specific capacity.

 

Disadvantages of graphite anode materials for lithium ion batteries :(1) insufficient capacity in grams, which makes it difficult to meet the actual needs of power batteries; (2) lower purity and more side reactions; (3) the stability of layered structure is poor, and it is easy to collapse after a long charging and discharging cycle, resulting in a serious decline in specific capacity and a significant shortening of energy storage life; (4) if the multiplier performance is poor and cannot be charged and discharged with large current, the battery will not be damaged; (5) the charging and discharging platform is too low.

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Natural graphite and synthetic graphite have always been the largest negative electrode materials used, but the high temperature treatment required in the production of artificial graphite has greatly increased its production cost and adversely affected the environment.

 

Compared with artificial graphite, natural graphite has many advantages, such as low cost, high crystallization degree, mature purification, crushing and grading technology, low charge-discharge voltage platform and high theoretical specific capacity. All these have laid a good foundation for its application in the lithium ion battery industry.

 

Graphite is considered as an ideal anode material for lithium battery because of its high stability, good conductivity and wide source. However, the capacity and ratio of natural graphite anode can not meet the needs of high performance anode materials. To solve this problem, researchers have carried out a series of modification studies on it.

 

Graphite material is the veteran of lithium ion battery field, with many excellent qualities. In recent years, carbon as the cathode material of lithium ion battery has attracted wide attention.