Lithium battery anode material LTO lithium titanate Li4Ti5O12

AFT-LTO-P2 is a kind of micron and submicron secondary particles composed of primary nanoparticles, which can effectively reduce gas production by graphene coating technology and bulk phase doping technology. It has a stable three-dimensional crystal structure, and the material structure hardly changes during the charge discharge process, which is called "zero strain material"; compared with graphite anode material, lithium titanate material almost does not form stable structure The SEI film with poor quality can avoid the out of control caused by the decomposition and regeneration of SEI film under extreme conditions, greatly reducing the hidden danger of battery fire and explosion;AFT-LTO-P2 has higher potential for lithium metal, avoiding the formation of lithium dendrite in the overcharge process of battery, and has better safety and stability; at the same time, it has three-dimensional lithium ion transmission channel, which can charge and discharge at a high rate; at - 50 ℃ extremely low temperature to 60 ℃ Complete charge and discharge can be achieved in the ultra-high temperature range of 0 ℃.

1. Advantages: good safety and reliability, long life, long-term use, low cost, high power, wide temperature range, excellent performance.
2. Disadvantages: low energy density.
3. Solution: due to the high potential of lithium titanate material, using aluminum foil as the coating substrate of negative electrode is much cheaper than copper foil (copper foil usually accounts for 20-25% of the cost of battery), which offsets the cost increase caused by low voltage to a certain extent; by replacing the negative electrode with aluminum foil, the weight of lithium titanate system will be reduced (the larger the battery volume is, the more obvious), It is found that the volume specific power and weight specific power of lithium titanate are close to those of LFP / C system at high rate discharge.
3. Application: energy storage, HEV, EV, super capacitor, special power supply

Scanning electron micrograph

XRD

Charge & discharge profiles (coin cell)

Precautions for product use

1. In the process of using AFT-LTO-P2 to prepare battery, the whole system should control all kinds of possible moisture more strictly than the conventional process. After opening the package of AFT-LTO-P2 powder, it must be baked in vacuum immediately. Do not expose it in the air for a long time. A strict baking system must be established for the powder and electrode plate (including heating, constant temperature and cooling process);
2. In NMP system, the conductive agent must be dispersed evenly and the amount of binder must be controlled;
3. The compaction density should not be too small or too large, 1.90 ~ 2.05g/cc is recommended;
4. Slurry mixing is different from conventional materials, so it must be more strict, otherwise it will affect the dispersion and the quality of the electrode plate. There are small particles on the electrode plate, which are very rough and unsmooth, and the reversible capacity is low.