Nano-Crystalline Tungsten Oxide Mitigates Lithium Battery Life Decay

Highly nano-crystalline tungsten oxide mitigates lithium battery life decay, the nanoparticle is an N-type semiconductor material with a moderate band gap and is widely used in the field of energy storage due to its excellent electrical conductivity.

Studies have shown that highly crystalline tungsten oxide nanoparticles can be used as an additive for electrode materials, so that there are more chemical active substances between the positive and the negative electrodes with a stable crystal structure and better physical and chemical properties, and effectively alleviate the current life-saving problem of lithium batteries. In other words, it can reduce the frequency relevant to equipment repairment or replacement.

Under the current technical conditions, the inconsistency between the cycle life of the energy storage battery and the cruising range has brought many hinders to the promotion and application of electric vehicles. So why does the high specific energy lithium battery life decay faster?

Microscopically, during the charging and discharging cycle of lithium batteries, internal of the battery occurs decomposition of electrolyte, deactivation of active materials, the collapse of positive and negative structures, etc., leads to a decrease in the number of charged lithium ions embedded and deintercalated, and resulting in permanent loss of battery capacity.

What is noteworthy is that under high temperature and high voltage conditions, the probability of side reaction between the surface of the highly delithiated cathode material and the electrolyte is significantly increased. For example, the probability of NCM811 reacting with electrolytes in the charged state is much greater than the probability of NCM 111 reacting with the electrolyte. Therefore, the higher the charge and discharge voltage and the higher the temperature, the faster the life of the lithium battery decay.

On the macro level, battery management systems play an important role in accurately measuring current, voltage, and temperature, as well as one of the key factors in thermal management, power management and energy management.

Therefore, experts modified the existing electrode material by adding a certain amount of high-crystallinity tungsten oxide nanoparticle to the electrode, as the oxide possesses a large specific surface area, stable chemical properties, and the advantages of strong rigidity effectively alleviate the problem of lithium battery life decay to a certain extent.

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