Reporters on the 24th from the Chinese Academy of Sciences Web site noted, Shenyang Institute of Metal Research Materials Science countries (Joint) Laboratory of High Performance Ceramics Materials Research Department Xiaohui group on the basis of previous study, by creating extremely dry acid synthesis environment, international for the first time to prepare a 12 nm thick [100] orientation LiFePO4 thin nanosheets. The work to further improve in the future rate performance lithium-ion battery to provide new methods and perspectives.

Experimental results show that the voltage hysteresis voltage having a gap created by far the smallest of the electrode material, potentiostatic intermittent titration test results indicate that the electrode has a high activation and conversion rates, these results indicate that the [100] orientation LiFePO4 Nanocrystalline the electrode sheet and having a high ratio of the number of activated particles. Thus, this electrode has an excellent rate capability and cycle life. In the C at 10 (60 minutes / 10 = 6 minutes) charge-discharge rate, after 1000 cycles to maintain 90% of the initial capacity. In the 20 C charge and discharge rate, the capacity can reach 72% of the theoretical capacity. The work to further improve the performance of lithium-ion batteries for future rate provided new methods and perspectives that not only can shorten the diffusion distance of lithium ions by reducing the scale [010] direction, but also through the regulation of the size of the [100] direction to improve lithium-ion batteries to improve the ratio of the number of particles activation rate performance lithium-ion battery.

Lithium ion batteries are necessary to power mobile electronic devices in today's society, a positive electrode, a negative electrode, separator, electrolyte and other components, the key performance indicators (eg, rate capability and cycle life) is determined by the electrochemical properties of cathode materials. LiFePO4 cathode material is recognized, in order to improve its electrochemical properties, it is long-term commitment to shorten the diffusion distance of lithium ions, namely to reduce the size of the [010] direction. Recent studies show that a large number of particles from the electrode, the electrochemical properties of the particles depends on the charging and discharging processes involved in the electrochemical reactions at the same time (activated particles) proportion of the total number of particles. So, how to get LiFePO4 having a high proportion of the number of particles activation key issues cathode materials research.