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I believe that many people have encountered the embarrassing situation of running out of battery on their mobile phones and being unable to find a place to charge when traveling or shopping.
With the advent of the 5G communication era, a new generation of consumer electronics products is developing rapidly. Behind the innovation of high-speed, large-capacity, and low-latency communication technology, the demand for equipment power capacity will also become higher and higher.
So, in the face of the current rising demand for equipment carrying power, what are the new research advances in lithium battery technology suitable for consumer electronic equipment? Where will the innovation of battery technology go in the future?
Recently, well-known experts in the industry - Professor Xia Yongyao from the Department of Chemistry, Fudan University, and Director Zhou Bo of the Research Department of the Power Battery Application Branch of the China Chemical and Physical Power Sources Industry Association were interviewed by China Science and Technology Network and shared their thoughts on the impact of the full arrival of the 5G communications era on consumer electronic batteries. Challenges and disruptions brought about by technology.
In the 5G era, the interconnection of everything is inseparable from strong “power”
Tablets, Bluetooth speakers, smartphones, consumer robots...the types of consumer electronic products are constantly increasing. On the one hand, the emergence of these consumer products brings people a real and convenient experience; on the other hand, people often Actual users who have seen such products complain that the products are unsatisfactory in one way or another.
"The arrival of the 5G era is not just a change in network speed, but also requires a series of power support systems." Zhou Bo, director of the Research Department of the Power Battery Application Branch of the China Chemical and Physical Power Sources Industry Association, believes that if the Internet allows The connection between people and things is getting closer, so the arrival of the 5G era not only improves the speed of this connection, but also allows basic cooperation between things.
"When our mobile phone runs out of battery and we encounter an emergency, at this time we especially hope to have a mobile phone battery with super high power." Zhou Bo said that most of the batteries used in mobile electronic products such as mobile phones and tablets on the market are mostly lithium. Although designers of ion batteries have been using various methods to continuously increase the battery capacity, compared with the rapid innovation speed of consumer electronics products, it is still very troublesome.
Zhou Bo believes that the 5G era of the Internet of Everything will undoubtedly drive the demand for hardware performance in various mobile devices, including mobile phones, wearable electronic products, Internet of Things devices, drones, etc. In this context, whether the battery life can support the high-speed computing requirements brought by 5G will be an important issue worthy of attention.
Industrial innovation, new generation battery technology is not yet mature for implementation
"Currently, the most technically mature battery in the 3C market is lithium cobalt oxide, which is also the most widely used cathode material in the consumer electronics market." Xia Yongyao, a professor at the Department of Chemistry at Fudan University, said that at present, the mainstream commercialization on the market Lithium battery cathode materials mainly include lithium cobalt oxide, lithium manganate, lithium iron phosphate, ternary materials (lithium nickel cobalt manganate, lithium nickel cobalt aluminate), etc. The latter three are mainly in demand in power batteries, and lithium cobalt oxide is more It is used in the field of consumer electronics.
For consumer electronic batteries, Xia Yongyao believes that the input and output performance of lithium-ion batteries mainly depends on the structure and performance of the internal materials of the battery, including anode materials, electrolytes, separators and cathode materials. Lithium cobalt oxide batteries have the advantages of high specific gravity, volume and weight energy density, making them the best choice for consumer electronics.
However, with the advent of the 5G era, consumer electronics products continue to introduce new products, and people’s demand for battery capacity is also rising sharply. Battery products are required to have greater flexibility, longer running time, lower costs and higher security. The characteristics of consumer electronic devices themselves also put forward more stringent requirements for the new generation of battery technology. The contradiction between the continuous miniaturization and battery capacity, the contradiction between charging and discharging speed and the number of charging and discharging, etc. are all urgently to be solved. The problem.
"When we talk about new generation battery technology, we mainly refer to negative electrode batteries represented by metallic lithium." Xia Yongyao believes that lithium-sulfur batteries, lithium-air batteries, etc. are all next-generation battery research directions, although the energy density of metallic lithium will be very high. High, but there are still problems such as safety hazards caused by dendrite formation during charging and discharging and low charging and discharging Coulomb efficiency. In particular, lithium-air battery technology is still very far away at present, and lithium-sulfur battery technology is not mature yet. Therefore, he believes that it is unlikely that the new generation of battery technology will be commercialized within ten years.
For enterprises, in addition to making great efforts on the stability and service life of batteries under the current technical framework, they also need to have a forward-looking awareness of technological revolution and continuously increase the exploration and research of new materials and new battery technologies in order to Be invincible when 5G arrives.
In addition, Xia Yongyao also told reporters that as the new consumer electronics industry represented by wearable devices continues to increase, the demand for consumer lithium batteries is also further increasing, and wearable devices usually use thin-film batteries of solid-state lithium batteries. Technology, thin film batteries are basically relatively mature in technology and process, such as bank cards, VR, bracelets and other wearable devices. According to iiMedia Research’s forecast, the demand for lithium batteries in the VR industry alone is expected to exceed 55 billion yuan by 2020.
On the eve of change, fast charging technology and the space for shared power bank
Talking about the future of consumer lithium batteries, Zhou Bo believes that there are two major development trends: one is technological innovation, such as increasing research on the replacement of positive and negative electrode materials to meet the dual requirements of consumer users for battery volume and capacity; the other is safety Performance, we need to maintain a more cautious attitude when it comes to new large-capacity, high-density battery technologies from the laboratory to the commercial market.
Currently, in order to meet users' demands for battery life indicators on the market, many consumer electronics merchants are also trying to improve the battery usage experience in many aspects, such as the well-known fast charging technology in the mobile phone field, and China's Huawei, OPPO, and Vivo in Excellent performance in this field.
"The vast majority of mobile phones use fast charging technology, which is quite popular." Zhou Bo believes that fast charging technology uses high-voltage current to increase the charging voltage and ultimately increase the charging rate of mobile phones, thus shortening the life of mobile phones. The charging time has been significantly improved.
"The combination of traditional lithium batteries and fast charging technology is not the latest technology, but it is an easy-to-achieve battery combination." Zhou Bo said that although fast charging technology is an alternative before the arrival of a comprehensive revolution in battery technology, But it also has some unavoidable disadvantages - the positive electrode structure of the battery is actually a very fragile structure. High-current charging and discharging will cause the particles to break. After the breakage, the surface area increases and the electrolyte coverage is insufficient, which will lead to reduced battery capacity and shortened life. short.
Although it is unlikely that the revolutionary new generation battery technology will be commercialized within ten years, with the advent of the 5G era, high-definition audio and video calls, high-power Internet of Things applications, etc. will surely add unimaginable growth to consumer electronics such as mobile phones. pressure. On the eve of the urgent need for systemic changes in battery technology, in addition to the fast charging technology just mentioned, the domestic venture capital market currently chooses to use the shared power bank model to solve users' mobile phone battery life problems, which is also a useful attempt.
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