文摘
Natural integrated carbon architecture cathodes without any additives, which were derived from the bark of plane trees, have highly loaded sulfur of 3.2–4.2 mg cm–2. The as-obtained carbon slice has an integrated architecture with micropore-to-macrospore distribution and a large surface area of 528 m2 g–1. As a result, the integrated carbon–sulfur cathode exhibited an initial discharge capacity of 1159 mA h g–1 at 0.2 A g–1 for a lithium–sulfur battery. Even after 60 cycles, a high specific capacity of 608 mA h g–1 with a high Coulombic efficiency (>98%) was retained, much better than MWCNTs-based electrodes and macropore-destroyed carbon slices.