Lithium sulphur (Li-S) batteries are known to have much higher charge capacity than the currently widely used lithium-ion batteries with graphite anodes. However, maintaining high charge cycle stability is a key challenge for Li-S batteries due to the shuttle effect. Here we show highly stable characteristics with 100% charge capacity of Li-S batteries with 500 charge/discharge cycles at 0.5 C, 1 C, 2 C and 3 C charge rates. This was made possible by the combination of laser synthesised sulfur (S) and nitrogen (N) doped graphene electrodes (without a binder) with molybdenum sulphide (MoS₂) nanoparticle loading. The N/S doped porous graphene structure presented enhanced interface adsorption by the production of –SO₂, which suppressed diffusion of polysulfide into the electrolyte through promoting oxygen-containing functional groups chemically bonding with sulfur. A low electrolyte resistance, interphase contact resistance and charge-transfer resistance accelerate electrons and Li⁺ transport by laser induced N/S doped graphene.

已知锂硫（Li-S）电池比目前广泛使用的带有石墨阳极的锂离子电池具有更高的充电容量。然而，由于穿梭效应，维持高充电周期稳定性是Li-S电池的关键挑战。在这里，我们展示了高度稳定的特性，其中Li-S电池的100％充电容量在0.5 C，1 C，2 C和3 C充电速率下具有500个充电/放电循环。通过将激光合成的硫（S）和氮（N）掺杂的石墨烯电极（无粘结剂）与硫化钼（MoS ₂）纳米颗粒负载结合使用，可以做到这一点。N / S掺杂的多孔石墨烯结构通过–SO ₂的产生增强了界面吸附，通过促进与硫化学键合的含氧官能团，抑制了多硫化物向电解质中的扩散。低的电解质电阻，相间接触电阻和电荷转移电阻通过激光诱导的N / S掺杂石墨烯来加速电子和Li ^+的传输。