Ultrathin Sheets of MoS₂/g-C₃N₄ composite As a Hosting Material of Sulphur for Lithium-Sulphur Batteries with Long Cycle Life and High Rate Capability

High energy density rechargeable batteries are the future of energy storage systems. Lithium ion batteries have brought revolutionary changes in the portable electronic devices for more than thirty years. However, the presently available lithium-ion batteries (LIBs) that follow intercalation-deintercalation mechanism cannot fulfil the energy demand of emerging electric vehicles (EVs), hybrid EVs, and next generation portable electronic devices. Therefore, alternative chemistry of lithium-ion batteries has drawn tremendous attention to overcome this bottleneck of high energy demand. Lithium-sulphur batteries holds enormous potential to meet the future energy demands because of its high theoretical specific capacity (1675mAh/g) and cost effectiveness [1]. The specific energy density of lithium-sulphur battery has a theoretical value of 2567Wh/kg, which is significantly higher than the commercially available lithium-ion batteries (387Wh/kg for LiCoO2 with graphite anode) [1]. In spite of the tremendous potential, lithium-sulphur battery systems have some challenging issues hindering its practical usage. The major challenge is the “shuttle effect” of higher order lithium polysulphides (Li2Sn, 4更多