Rambutan peel derived porous carbons for lithium sulfur battery

Abstract

Porous carbons were prepared from the biomass waste rambutan peels using hydrothermal carbonization followed by the KOH activation process. Rambutan peel derived porous carbons (RPC) with high surface area of 2104 m2 g−1 and large pore volume of 1.2 cm3 g−1 were obtained at KOH/carbon ratio of 4 and activation temperature of 900 °C. The as-obtained porous carbons were capable of encapsulating sulfur with a high loading of 68.2 wt% to form RPC/S composite cathode for lithium sulfur (Li–S) battery. High specific discharge capacities of about 1275 mAh g−1 were demonstrated by the RPC/S composites at 0.1 C. After 200 cycles at 0.1 C, a high specific capacity of 936 mAh g−1 was maintained, showing an excellent capacity retention of about 73%.

Three-dimensional embroidered ball-like α-Fe2O3 synthesised by a microwave hydrothermal method as a sulfur immobilizer for high-performance Li–S batteries

“…Over the past few years, researchers studied Li–S batteries by exploring the anode, 11 separator 12,13 electrolyte 14 and so on. Thus far, several carbon materials have been used to combine with sulfur to enable facile electron transfer and restriction of soluble LiPSs 15–19 Xie et al 20 proposed a strategy to hinder the shuttle effect by introducing mesoporous carbon implanted with atomic cobalt, which works as an active site for promoting the redox kinetics of LiPSs. The prepared cobalt-doped mesoporous carbon electrode delivers a high discharge specific capacity of 1130 mA h g −1 at 0.5C and a long cyclic life of 837 mA h g −1 (300 cycles).…”

Towards Negative Emissions: Hydrothermal Carbonization of Biomass for Sustainable Carbon Materials

“…[ 351 ] Moreover, porous carbons from rambutan peels exhibited increased sulfur hosting capacity while maintaining excellent electrochemical performance. These composites, with roughly 70% sulfur content, sustained a stable capacity of around 940 mAh g −1 S after 200 cycles at 0.2 C and 374 mAh g −1 S at 2 C. [ 352 ]…”

Working Mechanisms and Structure Engineering of Renewable Biomass‐Derived Materials for Advanced Lithium‐Sulfur Batteries: A Review

“…1500 mAh g −1 was achieved at a rate of 2 C. Rambutan peel contains more carbohydrates and is an ideal material for carbon sources. Lee et al [54] . used a hydrothermal carbonization activation method to prepare rambutan‐derived porous carbon (RPC).…”