Graphene batteries have higher efficiency and lifespan, bringing a qualitative leap forward for the development of smartphones

Tech 2023-05-21 04:28:19 Source: Network

Click on the top right to follow and unlock daily good articlesWen | Xue Zhengzheng aaEditor | Xue Zhengzheng aaintroductionFor decades, batteries have played a crucial role in the power supply of electronic devices, especially mobile phones.With the increasing demand for longer battery life and faster charging time, researchers have been tirelessly working to develop the next generation of batteries to provide better performance than existing batteries

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Wen | Xue Zhengzheng aa

Editor | Xue Zhengzheng aa

introduction

For decades, batteries have played a crucial role in the power supply of electronic devices, especially mobile phones.

With the increasing demand for longer battery life and faster charging time, researchers have been tirelessly working to develop the next generation of batteries to provide better performance than existing batteries.Graphene batteries seem to be the most promising type of technology in this category.

Graphene is a carbon allotropy discovered in 2004, and is famous for its special properties and strength weight ratio.

Characteristics and advantages of graphene batteries

Graphene batteries are composed of graphene and various other materials such as lithium ions. Its conductivity and high surface area make it an excellent material for electrode coatings.

Graphene can serve as an anode for different types of batteries, such as lithium-ion batteries commonly used in mobile phones.Compared with traditional batteries, using graphene batteries has significant advantages.

Higher charging rate

One of the most significant benefits of graphene batteries is their incredible ability to charge quickly. Typically, smartphones using traditional lithium-ion batteries require approximately two hours to fully charge.

By using graphene batteries, the charging time is significantly reduced, allowing users to charge their phones in just a few minutes. According to a report released by research institutions, graphene battery technology can complete charging in just 15 minutes.

Extending battery life

Another benefit of using graphene batteries in mobile phones is that they can extend the battery life even more. The main reason is that graphene can transport charges at a higher rate without significant degradation over time.

A typical lithium-ion battery will experience a capacity decrease of approximately 15% after approximately 300 charging cycles or one year of use, but graphene batteries maintain better power capacity. The lifespan of graphene batteries can reach up to 20 years.

Lighter, smaller size

The special properties of graphene make it a smaller and lighter battery, with a lower weight than traditional lithium-ion batteries. Researchers have shown that graphene based batteries greatly reduce the size of smartphones, which may benefit users who may value more mobility and convenience.

This characteristic of graphene batteries is particularly noteworthy, as the increasing impact of mobile devices on our daily lives means that their impact on the environment continues to multiply.

If the reduction in size and weight can be translated into a reduction in environmental pollution related to electronic waste, then they do propose a compelling proposition.

The Development of Mobile Phone Batteries

Since the initial launch of mobile phones decades ago, there has been significant progress in mobile phone batteries. At the beginning, the phone was bulky and had limited battery life. The size of a phone determines the size of the battery, which is not ideal for portability. With the development of mobile phone technology, battery performance has also significantly improved, but new challenges have also emerged.

In the early days of mobile phones, nickel cadmium (NiCad) batteries were the main source of power for portable electronic devices, including mobile phones.Nickel cadmium batteries have some advantages, such as high energy density, which means they can store more energy per unit volume.

But they also have many drawbacks:Low power capacity, reduced charging capacity after each cycle, ultimately leading to the popular 'battery memory'Partial charging reduces its overall performance.

Nickel hydrogen (NiMH) batteries emerged as a substitute for nickel cadmium batteries in the 1990s. Although they have similarities in material composition and usage, these newer types of batteries represent significant improvements to their predecessors.

Nickel hydrogen batteries are lightweight and have higher capacity than nickel cadmium batteriesMake them ideal alternative power sources for mobile phones and other portable electronic devices. Nickel hydrogen batteries are also more environmentally friendly because they do not have toxic materials.

Compared to later battery types, the biggest drawback of nickel hydrogen batteries is their slow charging time.

Lithium ion batteries entered the market in the late 1990s, completely changing the world of electronic products, especially mobile phones, and changing the way people use devices today.

Lithium ion batteries have small size and light weightThe energy density is significantly higher than that of nickel cadmium and nickel hydrogen batteries. It has higher efficiency and overall performance, and can support a range of applications beyond mobile devices in electric vehicles or energy storage systems.

Lithium ion batteries are superior to early technologies in many aspects. They have a higher energy density and can provide longer usage for mobile phones before they need to be charged.

They also have fast charging capabilities, which are crucial for supporting modern charging standards that require fast charging, such as Google Pixel's super charging or BraviaX1 Ultimate TV's fast loading and 10 minute battery life.

Lithium ion batteries are rarely affected by the "memory effect" of the old nickel cadmium batteries, nor do they contain toxic materials in nickel cadmium batteries.Due to their significantly slower charging efficiency and discharge speed compared to other battery technologies, their lifespan is longer than previous versions. Since its first launch several decades ago, its costs have significantly decreased.

The continuous improvement of lithium-ion battery technology has made these batteriesGreatly increased lifespan or memory retention abilityAt the same timeStill maintaining a relatively small physical size

the other oneThe development that enhances the practicality of lithium-ion batteries is their wireless charging capability

Although lithium-ion batteries can be considered the biggest technological advancement in mobile phone batteries, they are not without challenges. One of the biggest risks of using lithium-ion batteries is the threat of overheating, which may lead to explosions or fires.

The physical immobility of lithium-ion batteries makes thermal energy accumulation more likely, especially during rapid charging. Despite significant progress in research, this is still an important issue that needs to be addressed when designing mobile phones, as the miniaturization of the equipment makes cooling regulations more difficult.

Other related issues includeTechnical barriers and manufacturing challenges encountered in expanding production scale to support consumer demand

The Development of Mobile Phone Batteries

From the bulky equipment that used nickel cadmium batteries in the early days to today's efficient lithium-ion batteries, it can be seen how important battery technology is for modern use. Looking at the history and trends of this technology, it seems that there are still many possibilities for improvement that require continuous investment and innovation.

Although significant progress has been made in improving the durability, reliability, and lifespan of lithium-ion batteriesTo achieve the full potential of future portable electronic devices, it is necessary to continue to emphasize manufacturing technology, security protocols, and research.

The history of mobile phones has revealed a thought-provoking evolution from analog to digital, from briefcase sized devices that only wealthy elites carry around to the ubiquitous, fashionable, internet enabled devices of today.

The use of batteries is crucial for the power supply of these devices, so the development of innovative battery technologies such as graphene batteries may completely change this field.

Opportunities and challenges brought by the use of graphene batteries in mobile phones

Graphene based batteries have brought significant opportunities for the further development of mobile phone technology. Compared to other types of batteries, the most significant advantages of graphene based batteries include faster charging speed, longer duration, and the ability to make devices smaller and lighter from the perspective of end users.

Given the previous success of smartphone manufacturers, they have seen improvements in smartphones, such as better camera or screen resolution, which have increased sales and profitsManufacturers are eager to adopt new battery technology

manufacturing technology

the other oneAt the same time

Given these requirements,The commercial adaptability of graphene based batteries will require research investment

Security concerns

the other one

The thickness and stability of the folded sheets of graphene layers can cause significant mechanical stress between layers, leading toThermal and electrical faults

Potential for further innovation in graphene batteries

At the same time

Engineers have developed several methods to reduce production costs,Using renewable carbon sources

Can achieve higher power density

Author's viewpoint

At the same time

reference:

1.Gao,X.,Qiao,Y.,Li,F.,Yin,G.,& Wu,W. (2019).Graphene-basedmaterialsforadvancedlithium-ionbatteries.JournalofMaterialsChemistryA,7(31),18358-18375.

2.Kim,H.,Sivula,K.,Herzig,E.M.,andPark,Y.(2020).Graphene-basedmaterialsforenergystoragedevices:opportunitiesandchallenges.EnergyStorageMaterials,30,104-116.

3.Lee,C.,Zhu,W.,Zhang,Y.,Zhai,T.,Niu,Z.,Ma,L.,& Jia,D. (2018).Graphene-basedmaterialsforuseinlithium-ionbatteries.JournalofMaterialsChemistryA,6(39),18996-19020.

4.Wang,H.,Yang,X.,Tao,J.,Liu,D.,Zheng,X.,& Zhang,S. (2020).Advancesinresearchontheapplicationofgrapheneinlithium-ionbatteries.MaterialsScienceandEngineering:B,255,114376.

5.Wu,H.,Zhu,C.,Peng,L.,Chen,J.,& Xu,Q. (2019).Graphene-basedmaterialsforrechargeablebatteries.AdvancedEnergyMaterials,9(16),1900325.

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