Peking University Qilu professor: lithium battery, power battery technology direction in the future

A few days ago, our reporter interviews with the new energy material and technology laboratory of Peking University doctoral tutor professor Lu, a different point of view for lithium battery, he thinks "Power battery the future technical direction or lithium batteries ".Push this article today, trying to present another voice.

The lu

New energy material and technology of Beijing university laboratory of doctoral tutor professor lu

The future direction of technology or lithium batteries

China energy news: in your opinion, what is the developing direction of the future power battery?With the explosive growth of power battery, regarding its recycling by the national agenda.

The lu: the future direction of the power battery, used in hybrid electric vehicles is the use of the multiple metal oxide anode materials of high power lithium batteries.In the pure electric vehicle, the direction should be spinel lithium manganese acid.Pure electric vehicles in Japan is manganese acid lithium materials, also called spinel, because lithium manganese acid have different voltage and different structure, there are differences in naming.On the spinel lithium manganese acid technology, we have followed for more than 20 years, going from one generation to the second generation to three lithium battery is the direction of the future power generation, continuously to the market, such as the Olympic Games, world expo is the technology.

Lithium air batteries also in unceasingly study, cells in the direction of the future or in the lithium battery circles, whether lithium as the positive or negative.

After power battery used on electric cars, can recycle used for energy storage, and then as a resource recycling.Hundreds of electric buses, such as the Olympic Games was put into operation three years later, used in wind power and solar energy storage.Finally, recycle as material recycling.

China energy news: now the graphene fire was very hot, but a lot of people think that graphene is impractical.

Lu: graphene is entering this century to found a new material, has good physical and electrical conductivity.It is reported that graphene battery 8 minutes can travel 1000 kilometers.8 minutes recharge, today's multiple anode metal composite oxide battery also can do it, probably to charge with the ratio of 10 c.From the perspective of the material graphene conductive performance is good, but is derived by material to the battery to the electric vehicle is derived, the same concept?

10 c ratio mean?Usually travel 100 kilometers, the car will need at least 15 kw, 20 kw battery, if you want to travel 1000 km, with hundreds of kilowatts of batteries.If I use 10 c to charge again, how much power?Today's urban power grid simply can't do it.Although technically feasible, but actually cannot do it.For electric cars, can not only see mileage, a car full load cell unmanned, what is the meaning?Application of single battery or unit weight, volume electric vehicles can drive a certain weight or energy density to describe the advanced nature of the electric car.

Power battery performance to improve quality

China energy news: are you the cobalt acid lithium, manganese acid lithium battery cathode material main founder, is the 2008 Olympic Games, world expo 2010 electric cars with power battery projects and national "11th five-year plan" 863 electric carsPower lithium batteryProject director.After years of development, the current situation of power battery?

Lu: I returned home in 2000, the rapid build China's first cobalt acid lithium production line, used for 1 year or so, to achieve the zero breakthrough in China's cobalt acid lithium production.After, we developed and produced two kinds of lithium batteries, one is the high capacity of manganese acid lithium battery, one is the high power multiple metal oxide composite materials of lithium battery.During and after Beijing Olympic Games, to ensure that the 50 electric cars and hundreds of hybrid buses safe and efficient operation.

Now the cost of lithium-ion battery has dropped sharply, a decade ago, China's lithium battery diaphragm and 40 yuan per square meter, now whether the positive or negative material of the lithium battery materials already very cheap, have a diaphragm cell manufacturer is said to have done a couple of dollars.Rapid development of lithium-ion batteries at the same time, also exposed the security problems, such as battery explosion.Lithium batteries need to be within the next few years made smaller, lighter, more safe and reliable, cheap, battery vehicle technology is also need to catch up.Hope to be lithium batteries to do strongly does the industry, not to mention is synonymous with poor quality cheap products made in China.

China energy news: passenger car with miit suspendedThe ternary lithium batteryHow, think about it?

The lu: it's a bit extreme, one-sided.Ten years I have said, the ternary lithium battery is not suitable for pure electric vehicles, but can be used in hybrid electric vehicle.In the experiment, three yuan in quick charge lithium battery, heat cannot be released quickly, increase the possibility of explosive.

China energy news: lithium iron phosphate technology now?

Lu: lithium iron phosphate technology without development future.Five years ago,lithium iron phosphate batteriesOccupy the market, the vast majority of the last two years the ternary lithium batteries increase rapidly.But the former life is poor, poor safety, large volume, low energy density and performance than ternary lithium batteries.

China energy news, the state council executive meeting of the substantial breakthrough, put forward to realize power battery ministry of 500 million set up the nine companies of power battery research and development platform.

Lu: the nine enterprises, in addition to the tianjin lishen, are state-owned automobile manufacturing enterprises.Their specialty is to do car, but the breakthrough bottleneck based talent need batteries, the accumulation of technology can be not easy to spend money.

Focusing on remote without electricity energy storage using population

China energy news: in terms of energy storage, Japan led the world.What do you think the government should give policy or subsidies to support?

Its lu: despite its early and leads the world in energy storage technology, but in Japan, because of its network extended to every household, family of photovoltaic power generation is widely used, the more electricity into the grid at any time, not much energy storage applications.But in China, we are in the field, such as terrain open place, development of large, centralized clean energy to generate electricity.Due to the intermittent scenery, instantaneous power impact to power grid.And Japan by 80% or more families have their own roofs, family photovoltaics for grid impact force compared with centralized is different.

Subsidies for energy storage industry, the policy should be based on market behavior.Also hope that countries can more support basic research, prudence seriously practice the basic skills.

China energy news: in China, the development of the centralized photovoltaic has impact to the power grid, the development of distributed own roof, that how to "?

Lu: we solve the problem of family energy storage is now focused on the population of the more remote areas without electricity.Such as Tibet around 700000 tibetans have no access to electricity.Other remote areas, such as YunGuiChuan, xinjiang, Inner Mongolia and other regions of the population without electricity, add up is also a big number.

Three years ago, we carried out in erlianhot of the Inner Mongolia dozens of homes herdsmen photovoltaic + energy storage test.Results show that the herdsmen home, in addition to the heating power, including cooking, refrigerator, TV, electric welding, cutting, such as cattle and sheep milk power can provide.Every home 3-5 kw, 85% by the local government subsidies.Herdsmen every year for diesel generator, such as household appliances, electric motorcycle electricity can save more than 10000 dollars.The most important thing is to change the traffic block, let they unicom world, understand the information.

Now we and Tibet Naqu local governments also have a preliminary cooperation intention, as an important means of poverty alleviation.This and previous pv concept for poverty alleviation, previous pv poverty alleviation is large-scale centralized construction, money for power generation enterprises, but the nomads too scattered, not really benefit from it.

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