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Which is better, graphene battery or lithium battery? Advantages and disadvantages of graphene batteries and lithium batteries. Lithium batteries are composed of four major materials: positive electrode, negative electrode, separator, and electrolyte. Currently, graphite is the main negative electrode material used. Graphene has extremely strong conductivity, ultra-high strength, high toughness, and high thermal conductivity. People hope that it can replace graphite as the negative electrode of batteries or be used as other key materials in lithium batteries, in order to significantly increase the energy density and power density of lithium batteries.

From the current stage of technological development, graphene batteries have not yet emerged. Graphene has a layered structure, which sets a gate for the insertion of lithium ions. This structure is the determining factor for the charging and discharging platform and high Coulombic efficiency of lithium batteries, and it is also one of the important factors that make it a key material for lithium batteries.

Which is better, graphene battery or lithium battery?

① Graphene battery is a honeycomb like planar thin film formed by sp2 hybridization of carbon atoms, which is a quasi two-dimensional material with only one atomic layer thickness. A new energy battery has been developed by utilizing the rapid and massive shuttle motion of lithium ions between the graphene surface and electrodes, which is considered one of the most promising materials in the future.

② Compared to graphite based batteries, lithium batteries are significantly more advanced, leading in power characteristics, capacitance, charging speed, and other aspects. Graphene thin batteries can achieve larger capacity and faster charging speed in a smaller volume.

③ From a usage perspective alone, graphene batteries are fully capable of fulfilling the role of lithium batteries in electric vehicles. They have larger storage capacity, faster charging speed, and are more durable than lithium batteries at high temperatures. Therefore, graphene batteries are no problem as electric vehicle batteries.

④ At present, graphene has not yet reached the practical stage, and there is still a long way to go before mass production. The huge shortcomings of lithium batteries in terms of safety, battery life, environmental pollution, and charging speed have seriously limited the development of major high-tech industries. Therefore, many research and development departments of enterprises have turned their attention to more advanced graphene batteries and believe that this new type of battery will completely replace lithium batteries that have been around for over 26 years in the future.

Advantages and disadvantages of graphene batteries and lithium batteries

1、 Advantages and disadvantages of graphene batteries

1. Graphene battery is a single atomic layer planar thin film composed of carbon atoms, with a thickness of only 0.34 nanometers. It is currently the lightest, thinnest, and hardest known nanomaterial in the world, with good transparency and foldable properties;

2. Graphene is the most conductive material in the world. Adding graphene composite conductive powder to traditional mobile phone lithium batteries improves the rate charging and discharging performance and cycle life of the battery;

3. Safe and stable, a new type of graphene polycarbonate capacitor battery. After being fully charged, use a nail gun to short circuit it without any reaction; Burning on fire will not cause an explosion;

4. Incompatible process characteristics and a large specific surface area of graphene can cause a lot of process problems for the dispersion and homogenization processes of existing lithium-ion batteries;

5. Graphene batteries on the market are not pure graphene batteries, but rather incorporate some graphene related technologies on the basis of lithium batteries. Compared with traditional lithium batteries, the performance improvement it brings is only a little bit. In addition, the cost of graphene is very high, and its manufacturing process is also very high. The manufacturing process of graphene batteries is still not mature enough, At present, it is only in the laboratory stage and cannot reach the level of mass production.

2、 Advantages and disadvantages of lithium batteries

1. High energy density, with volume energy density and mass energy density reaching 450W.h/dm3 and 150W.h/kg respectively, and continuously increasing;

2. Long service life, 100% DOD charging and discharging can reach more than 900 times; When using shallow depth (30% DOD) charging and discharging, the number of cycles has exceeded 5000;

3. Without the same memory effect as Ni Cd and Ni MH batteries, the cycling performance is superior;

4. Poor compatibility with ordinary batteries, as lithium-ion batteries can only be used as substitutes when using three ordinary batteries (3.6V);

5. High cost, mainly due to the high price of positive electrode material LiC002. With the continuous development of positive electrode technology, LiMn204, LiFeP04 and other materials can be used as positive electrodes, which is expected to greatly reduce the cost of lithium-ion batteries.

Overall, although graphene batteries outperform traditional lithium batteries in terms of performance, they still cannot replace the position of lithium batteries in the field of electric vehicle batteries. Nevertheless, the development of graphene batteries is still ongoing, with a focus on simplifying the process and optimizing the materials. Future use as electric vehicle batteries may not be a dream.

It can be seen that graphene batteries have considerable potential and are the best material to replace lithium-ion batteries. Due to the poor safety and fire risk of lithium batteries, graphene batteries have become a highly anticipated hot research direction in recent years. In addition, the new type of nano tungsten oxide lithium battery with high safety performance may also become one of the most promising batteries in the future.

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