What are the advantages and disadvantages of lithium titanate batteries?

APR 16, 2019   Pageview:80

Disadvantages of lithium titanate batteries:

 

High potential for lithium, resulting in low working voltage and lower energy density

 

2. Battery manufacturing process is easy to produce gas

 

3. Poor electron conductivity

 

Advantages of lithium titanate batteries:

 

Good safety, the most important point of electric vehicle batteries is the need for high safety, lithium titanate because of its high equilibrium potential, will not form lithium dendrites at the negative pole, and have good safety.

 

2. The recycling performance is good. Because it is a "zero-strain" material, it does not change the structure during the charging and discharging process and has very superior recycling performance.

 

3. It can be quickly charged and discharged. The diffusion coefficient of lithium ions in lithium titanate crystals is 2 × 10-8cm-2 / S, which is an order of magnitude more than the negative electrode of graphite. It can be quickly charged and discharged. The rapid charging ability is an examination of electric vehicle batteries. An important indicator.

 

4. The operating temperature range is -30 °C -60 °C. At low temperatures, the embedding and removal capabilities of lithium will be reduced, especially the embedding capabilities. Lithium dendrites that cause short circuit or deterioration of negative poles will not appear when charged at -30 °C. appear, this is the graphite negative pole can not do, in a wide range of environments can quickly charge and discharge, suitable for vehicle use.

 

5. Since the discharge is small, we mentioned our experimental data in a post. The positive pole uses our conventional lithium manganate, the negative electrode uses lithium titanate, and the 60-degree storage has a 28-day capacity surplus of 88 %, and the capacity recovery rate is 95 % or more.

 

Disadvantages of Lithium Titanium Battery: Introduction of Disadvantages

 

1. High potential for lithium, resulting in low working voltage and lower energy density

 

2. Battery manufacturing process is easy to produce gas

 

3. Poor electron conductivity

 

Disadvantages of Lithium Titanium Battery: An Introduction to Advantages

 

1. The safety is good. The most important point for electric vehicle batteries is the need for high safety. Lithium titanate has a high balance potential and will not form lithium dendrites at the negative pole and has good safety.

 

2. The recycling performance is good. Because it is a "zero-strain" material, it does not change the structure during the charging and discharging process and has very superior recycling performance.

 

3. It can be quickly charged and discharged. The diffusion coefficient of lithium ions in lithium titanate crystals is 2 × 10-8cm-2 / S, which is an order of magnitude more than the negative electrode of graphite. It can be quickly charged and discharged. The rapid charging ability is an examination of electric vehicle batteries. An important indicator.

 

4. The operating temperature range is -30 °C -60 °C. At low temperatures, the embedding and removal capabilities of lithium will be reduced, especially the embedding capabilities. Lithium dendrites that cause short circuit or deterioration of negative poles will not appear when charged at -30 °C. appear, this is the graphite negative pole can not do, in a wide range of environments can quickly charge and discharge, suitable for vehicle use.

 

5. Since the discharge is small, we mentioned our experimental data in a post. The positive pole uses our conventional lithium manganate, the negative electrode uses lithium titanate, and the 60-degree storage has a 28-day capacity surplus of 88 %, and the capacity recovery rate is 95 % or more.

 

Advantage

 

The use of electric vehicles to replace fuel vehicles is the best choice to solve urban environmental pollution. Lithium-ion power batteries have aroused widespread concern among researchers. In order to meet the requirements of electric vehicles for vehicle-mounted Ionic power batteries, the development of negative electrode materials with high safety, high ratio performance and long life is a hot spot and difficult point.

 

The commercial lithium ion battery negative electrode mainly uses carbon materials, but there are still some disadvantages in the application of lithium batteries with carbon as the negative electrode:

 

1, it is easy to precipitate lithium dendrites when overcharging, causing a short circuit in the battery, affecting the safety performance of lithium batteries;

 

2, easy to form SEI membrane, resulting in lower charging and discharging efficiency for the first time, and large irreversible capacity;

 

3, that is, the platform voltage of the carbon material is low (close to the metal lithium), and it is easy to cause the decomposition of the electrolyte, which brings about safety hazards.

 

4, in the process of lithium-ion embedding, extraction volume change is large, the cycle stability is poor.

 

Compared with carbon materials, spinel type Li4 Ti5O12 has obvious advantages:

 

1, it is a zero-strain material, good recycling performance;

 

2, the discharge voltage is stable, and the electrolyte does not decompose, improving the safety performance of lithium batteries;

 

3, compared with carbon negative electrode materials, lithium titanate has a high lithium ion diffusion coefficient (2 * 10-8cm2 / s), and can be charged and discharged at high magnification.

 

4, lithium titanate has a higher potential than pure metal lithium, and it is not easy to produce lithium crystal branches, which provides a basis for ensuring the safety of lithium batteries.

 

Disadvantage

 

1, relative to other types of lithium-ion power battery energy density will be lower.

 

2, flatulence problem has been hindering the application of lithium titanate batteries.

 

3, relative to other types of lithium-ion power batteries high prices.

 

4, there are still differences in battery consistency, with the increase of the number of battery consistency will gradually increase.

 

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