As a cathode material for lithium-ion batteries, the high theoretical capacity of sulfur (1675 mAh g−1) has attracted much attention. However, sulfur has the disadvantages of non-conductivity, lithium polysulfide dissolved in the electrolyte, and large volume expansion. These problems make the large-scale application of lithium-sulfur batteries face many challenges, including safety, rate performance, and cycle stability. To overcome these problems, the Center for Functional Polymer Materials of the Institute of Physics and Chemistry, Chinese Academy of Sciences has developed a new method for in-situ preparation and loading of sulfur in three-dimensional porous carbon (3D PGC) structures. Sulfur is loaded under the premise of maintaining nanometer dispersion. The amount reached 90%, creating a record for the highest sulfur loading, with an initial specific capacity of 1382 mAh g-1; the in-situ loading of sulfur also forms a carbon-sulfur bond, significantly improving the charge-discharge cycling stability of the electrode material, through 1000 After the secondary cycle, the average cycle capacity decay was only 0.039%, achieving the highest current cycle stability. Therefore, this material improves the charge and discharge cycle stability of the electrode material 3D S@PGC while improving the sulfur loading and utilization efficiency, and opens up new ideas for the design of new generation lithium ion battery electrode materials. The relevant research results were published in the international journal Nature Communications (Nature Communications 2016, 7, 10601). Afterwards, Prof. Rodney Ruoff, a well-known international carbon materials scientist, and Ji Hengxing, a professor at the University of Science and Technology of China, wrote an article in the journal Physical Chemistry (Acta Phys. Chim. Sin. 2016, 32, 797) on the above research results. Innovation was evaluated. The research work was strongly supported by the "100-person Plan" of the Chinese Academy of Sciences and the National Natural Science Foundation.
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