Can rice husks make lead carbon batteries? Why are lead carbon batteries not popular?

Lin Haibo's team from the School of Chemistry of Jilin University is the first in the world to use rice husks to prepare high-performance battery-grade carbon materials, and use this material to develop cost-effective lead-carbon batteries, whose performance has reached the international advanced level. Recently, the scientific research results have been built 100-ton supercapacitor carbon and 1000-ton battery carbon production lines.

Lead-acid batteries are one of the most widely used batteries. In 2005, scientists combined lead-acid batteries and supercapacitors to invent super batteries (lead-carbon batteries), which significantly improved their performance indicators compared with traditional lead-acid batteries. Lead-carbon batteries are known as a new generation of lead-acid batteries, which are currently a research hotspot in the field of international lead-acid batteries.

After more than 10 years of hard work, the team has overcome key technologies such as the green preparation process of biomass rice husk-based capacitive carbon, carbon additives for rice husk-based batteries, and lead-carbon battery anodes, and developed cost-effective lead-carbon batteries. Compared with ordinary lead-acid batteries, lead-carbon batteries have the advantages of 6 times longer cycle life, 8 times faster charging speed and 3 times higher discharge power, while having the advantage of low cost. The lead-carbon battery has passed the test of the third-party authority of the National Chemical Power Product Quality Supervision and Inspection Center.

The results have been published in more than 50 international core journals and more than 20 invention patents. This achievement realizes a complete industrial chain of rice husk-based battery carbon materials, lead-carbon batteries and product applications, which are mainly used in the fields of automotive start-stop power supply, automotive hybrid and energy storage.

Lead-acid batteries are relatively old batteries, which have been used for 150 years and have good performance, but it is difficult to support high-current deep discharge;

Lead-carbon battery is a new type of super battery, you can understand it this way, lead-carbon battery is a lead-acid battery and a supercapacitor in one:

It not only gives full play to the advantages of supercapacitor instantaneous large-capacity charging, but also gives full play to the specific energy advantage of lead-acid batteries, and has very good charging and discharging performance - it can be fully charged in 90 minutes (if the lead-acid battery is charged and discharged in this way, the life span is less than 30 times). And because of the addition of carbon (graphene), the sulfation of the negative electrode is prevented, which is a factor of battery failure in the past, and the battery life is extended.

Lead-carbon batteries are a combination of lead-acid batteries and supercapacitors, and although their performance is better than traditional lead-acid batteries and in some ways close to lithium-ion batteries, their popularity is still low.

The main reasons are as follows:

1.Lead-carbon batteries are bulky and heavy, making them less suitable for mobile loads such as electric vehicles.

2.Even though lead-carbon batteries have made technical improvements, such as increasing specific energy, their cycle life is still relatively short and their energy density is low.

3.Lead-carbon batteries have poor charging acceptance, making it difficult to achieve fast charging.

4.The manufacturing cost of lead-carbon batteries is high, which makes its comprehensive cost close to that of lithium-ion batteries, but lithium-ion batteries have higher performance in terms of energy density and charging speed.

In summary, although lead-carbon batteries combine the advantages of lead-acid batteries and supercapacitors, their performance and cost are still not competitive with lithium-ion batteries in practical applications, resulting in their low popularity.

It is large in size and heavy in weight, so it is not suitable for mobile loads such as electric vehicles.

Lead-carbon battery is a new type of lead-acid battery.

It will be lead-acid batteries and supercapacitors.

The performance of the lead-carbon battery is better than that of the old first-pass lead-acid battery, which not only gives full play to the advantages of instantaneous large-capacity charging of supercapacitors, but also gives full play to the energy advantages of lead-acid batteries.

Due to the use of lead-carbon technology, the performance of lead-carbon batteries is far better than that of traditional lead-acid batteries, and can be applied to new energy vehicles, such as: hybrid vehicles, electric bicycles and other fields; It can also be used in the field of new energy energy storage, such as wind and solar power generation and energy storage. Lead-carbon batteries have similar low-cost advantages and mature industrial manufacturing base as traditional lead-acid batteries, and have strong competitive advantages in various application fields.

This hybrid technology enables the rapid output and input of electrical charges during acceleration and braking of the vehicle, making it particularly suitable for the "stop-and-start" system of micro-hybrids. Lead-carbon batteries can increase the power of the original lead-acid batteries and prolong their service life.

Lead-carbon battery is a carbon material (C) with electric double-layer capacitance characteristics and sponge lead (PB) negative electrode combined to make a lead-carbon bifunctional composite electrode with both capacitive and battery characteristics (referred to as lead-carbon electrode), and the lead-carbon composite electrode is matched with PBO2 positive electrode to assemble a lead-carbon battery.

As a new type of super battery, the lead-carbon battery is a fusion of lead-acid battery and supercapacitor technology, and is a dual-function energy storage battery with both capacitive and battery characteristics. Therefore, it not only gives full play to the advantages of supercapacitors for instantaneous power and large-capacity charging, but also gives full play to the energy advantages of lead-acid batteries, which can be fully charged in one hour. It has very good charging and discharging performance.

A new type of battery based on lead-carbon technology developed by Axion Power in Pennsylvania, USA, is a high-specific surface carbon material (such as activated carbon, activated carbon fiber, carbon aerogel or carbon nanotube, etc.) is incorporated into the lead anode, which exerts the high conductivity of the high-specific surface carbon material and the dispersion of lead-based active substances, improves the utilization rate of lead active substances, and can inhibit the growth of lead sulfate crystals. The principle is similar to that of a super battery, it is another type of super battery. The carbon material is added to the negative plate to give full play to the advantages of instantaneous large-capacity charging of its supercapacitor, and plays the role of a buffer during high-rate charging and discharging, effectively protecting the negative plate and inhibiting the phenomenon of "sulfation".

Lead-carbon batteries are innovative technologies for lead-acid batteries, which have many advantages over lead-acid batteries. Lead-carbon batteries have the following advantages: first, fast charging, 8 times faster charging; second, the discharge power has been increased by 3 times; Third, the cycle life is increased to 6 times, and the number of cycle charging reaches 2000 times; Fourth, it is cost-effective, which is higher than the price of lead-acid batteries, but the life of recycling is greatly improved; Fifth, it is safe and stable to use, and can be widely used in various new energy and energy-saving fields.

In addition, lead-carbon batteries also give full play to the specific energy advantages of lead-acid batteries, and have very good charging and discharging performance - it can be fully charged in 90 minutes (if lead-acid batteries are charged and discharged in this way, the life span is less than 30 times). And because of the addition of carbon (graphene), the sulfation of the anode is prevented, which is a factor of battery failure. 1. The positive and negative lead paste adopts a unique formula and optimized curing process.

The cathode active substance has strong softening resistance, good deep cycle life, and high utilization rate of the active substance; The negative lead paste has strong anti-sulfur ability, low capacity attenuation rate and good low-temperature start-up performance. 2. The positive grid adopts a new special alloy and reasonable structural design, with good corrosion resistance, reasonable current distribution, tight combination with active substances, strong high current performance and charging acceptance capacity. 3. Using new electrolyte additives, the hydrogen evolution and oxygen evolution overpotential of the battery is high, and the battery is not easy to lose water.

4. When the battery is charged and discharged in frequent instantaneous high-current charging, the current is mainly released or received by the carbon material with capacitive characteristics, which inhibits the "negative electrode sulfation" of the lead-acid battery and effectively prolongs the service life of the battery; 5. When the battery is working at a low current for a long time, it is mainly operated by the sponge lead anode to continuously provide energy; 6. The intervention of the lead-carbon super composite electrode with high carbon content makes the electrode have better low-temperature start-up ability, charging acceptance ability and high-current charging and discharging performance than traditional lead-acid batteries.