Can supercapacitors replace lithium batteries with the help of graphene?

Compared to the lithium battery, super capacitor charge and discharge has high speed, high efficiency, long cycle life and good safety. These seem to be the solution of electric car marketing dilemma now.

In lithium the battery industry is enjoying the ZhongXingPengYue a chase, its potential of a rival, has quietly approached, eyeing up, it is the super capacitor.

Recently, market research firm IDTechEx put forward a bold claim, super capacitor will be destroyed lithium ion batteries the market. Titled "2014-2024 super capacitor in the market," the report, IDTechEx, said in 2024, the world's super capacitor will reach $6.5 billion market value, increase market share at the same time will engulf the battery market.

The so-called super capacitors, is between conventional capacitors and rechargeable batteries is a new type energy storage device. Its basic principle and other kinds of electric double layer capacitors, is activated carbon by using porous electrodes and the electrolyte of electric double layer structure for large capacity. Because of its capacity is large, external performance and the battery is the same, so there are called "capacity battery".

Why do some people think that it will replace lithium battery? They are mainly from its performance considerations. Compared with lithium battery, super capacitor charging and discharging has high speed, high efficiency, long cycle life and high safety. These seem to be all the electric car marketing dilemma now.

South car plant machine single batch delivery in May this year the world's first super capacitor 100% low floor trams, its use super 7500 f electric double layer capacitors, life up to 10 years, cycle count up to 1 million times. Train every station can be fast charging, maximum charging time of 30 seconds, the fastest 10 seconds can finish charging.

Super capacitor is higher than the safety performance of lithium-ion batteries, also in all kinds of events in recent years to manifest. In the past year, Boeing, apple, tesla companies are trapped in the safety of lithium-ion batteries, such as frequent trigger events. Experts also pointed out that the lithium battery "boys will be boys", be hard to make up for its safety from the technology. And the use of electrostatic charge stores electrical energy for the super capacitor itself to guarantee its safety performance.

Today, the super capacitors because of its low energy density board, the main also plays the supporting role of lithium-ion batteries. Because of the application of "universal material graphene, super capacitor for lithium batteries in the footsteps of seems to be getting closer.

The researchers demonstrate its performance with flexible solid-state super capacitor

Although there are many domestic and foreign to this debate, there is no consensus. But compared to domestic for lithium battery high enthusiasm, in Europe and the United Nations is more balanced. In Germany, for example, in 2008 promulgated by the German national electric vehicle development plan, will be the super capacitor with lithium battery research and development on the same equal status.

In the industrialization of super capacitor, the United States, Japan, Russia, Switzerland, South Korea, France some of the companies with many years of research, development and technology accumulation, now is in the lead. Maxwell, such as America, Japan's Nec, Panasonic, Tokin and Russian Econd company, etc., the company currently occupy the most markets around the world.

Of Maxwell's first taste of the big cake from the Chinese market, according to the U.S. investment bank sent jie (PiperJaffray) analysts said Alexander Potter Yutong company is currently the Maxwell's biggest customer, and the order is still in accelerating growth.

In recent years, due to watch the broad application prospect of this field, some Chinese companies are also beginning to actively involve in the industry. But due to the high technical barriers, before 2012, engaged in large capacity of the super capacitor research and development of domestic manufacturers a total of more than 50, but production and can reach the level of practical factory only a dozen.

However, given that the super capacitor can be applied to new energy power generation, smart grid, new energy vehicles, energy saving buildings, industrial and other various industries. Energy saving and emission reduction will replace lithium-ion batteries after ten years regardless of its purpose determines its strategic value.

The page contains the contents of the machine translation.