Abstract

The mesoporous hollow carbon spheres have been prepared by thermal oxidation etching strategy, and characterized by transmission electron microscopy and the Brunauer-Emmett-Teller method. The mesoporous hollow carbon spheres can be obtained by means of controlling the thermal oxidation times of solid carbon spheres in air. The mesoporous hollow carbon spheres at the optimum thermal oxidation time of 1.5 h in air showed the highest specific surface and the highest total pore volume. Furthermore, the hollow carbon sphere-sulfur composite cathodes achieved high initial discharge capacity of 1423.9 mAh g−1, excellent discharge capacity and excellent rate performance.

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