Non-conductive cathode material
Lithium-ion canon bp-511 batteries have high energy density, long life, environmental protection, etc., quickly replaced after the advent of nickel-cadmium, nickel metal hydride battery status of the traditional, since 1991 Japan’s Sony Corp. after the first of its commercialization, the market continued to expand the scope, only used for a decade, global output value of more than cadmium and nickel metal hydride batteries, and. However, due to rapid growth in demand for materials, the cost of lithium-ion battery has become increasingly evident. How to make lithium-ion battery “completely changed”?
The “863 program began in the battery research and development of new materials give us more support.” Huang Xue-Jie introduced cathode material in lithium ion batteries is the cost of the most prominent materials, but also directly related to the safety performance of the battery and battery to achieve large-scale possible, but the traditional lithium cobalt oxide cathode material — the annual demand has been more than 10,000 tons, leading to sharp rise in cobalt prices, the lack of resources has begun to restrict industrial development. “We have developed Manganese and iron materials, to improve canon nb-2l battery performance, cost-effective and safe for the purpose has now developed a high-performance manganese lithium and oxygen vacancies lithium iron phosphate cathode materials.”
Through surface modification, substantial increase in lithium manganese oxide cathode material for high temperature stability and high-current charge-discharge capacity of the material mass production in early 2004 for the successful development of hybrid electric vehicle batteries and small-scale power canon nb-2lh battery industry is providing a cathode material for protection .
Lithium iron phosphate with a stable, long life, etc., but there is a critical issue — the conductivity is very low, non-conductive material on how to do cathode material? Huang Xue-Jie smiled and told reporters: “This is an interesting way to solve this problem is that we ‘count’ out.”
He said: “Research on lithium iron phosphate, we have no access to outside information, as usual after a lot of changes in composition and synthesis conditions of the test dell latitude d520 battery, but theoretical calculations predict the first carried out and synthesis methods of exploration. By first-principle calculation , we find that by doping, the formation of oxygen vacancies can enhance conductivity, this discovery pointed out the direction for the material synthesis. According to our developed a unique synthetic method to prepare a reversible capacity of 160mAh / g of oxygen vacancies phosphate Lithium iron materials, recycling 500 times the capacity no attenuation, especially with a high magnification (10C) discharge capacity. 863 plan a project acceptance, the participating experts agreed that the outcome of forefront of the international leading level, and has achieved important results of original . “He said:” This result applied for three invention patents, the present pilot is progressing smoothly, a synthesis from a few dozen grams expanded to dozens of kilograms of grade level, Dell Battery already have 50 kg / batch trial production capacity. Another life expectancy can be 30 to 40 years thousands of times. “