期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 5, 期 13, 页码 6052-6059出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ta10163a
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Good progress has been made in improving lithium sulfur batteries through trapping sulfur in porous carbon materials by controlling the pore size. However, microporous carbon/ sulfur composites suffer from lower sulfur contents through the traditional sulfur loading methods. In this paper, we present an effective and facile approach to prepare a double-hollow-sphere structured microporous carbon coated sulfur composite by in situ oxidizing the microporous carbon coated metal sulfide precursor. The composite efficiently traps sulfur inside the microporous-walled hollow carbon sphere. With the appropriate sulfur content ranging from 55 wt% to 75 wt%, the composites demonstrate promising cycling performance. The composites deliver a capacity retention of 96.11% at 0.2C after 100 cycles, and a relatively low decay rate of 0.05% per cycle after 1000 cycles at 1C.
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