Lithium sulfur battery anode material and preparation method thereof

Abstract

The invention relates to a lithium sulfur battery anode material and a preparation method thereof. In the anode material, nano sulfur particles are uniformly filled in hollow carbon nano-tubes of a nano mesoporous carbon material, so that sulfur is tightly contacted with carbon. The thickness of each carbon tube in the nano mesoporous carbon material is 5 to 200nm, the pore diameter is 2 to 100nm and the granularity of the sulfur nano particles is 2 to 100nm. The capacity of the prepared lithium sulfur battery anode material is more than 1,800mAh / g, and the capacity is kept over 80 percent after 500 cycles.

Description

technical field

[0001] The invention relates to a lithium-sulfur battery cathode material and a preparation method thereof, in particular to a nanometer mesoporous carbon material uniformly filled with sulfur nanoparticles and a preparation method thereof. Background technique

[0002] With the gradual depletion of major natural resources such as coal and oil, the energy crisis has become one of the major issues that human beings must solve in the future. At present, green and pollution-free new high-energy chemical power sources have become a hot spot that countries all over the world are competing to develop.

[0003] Lithium-sulfur batteries hold great promise, and chemists have been working on them for nearly 20 years. Sulfur and lithium are considered to be the most ideal battery materials. The combination of these two chemical substances can not only provide high-density energy, but also have better stability, safety and life, and can be used in lithium batteries Com...