竹基碳纤维/MoS2锂离子电池负极材料

随着电子产品、电动汽车以及智能电网的快速发展，不仅需要锂离子电池(LIBs)具有优异的储锂性能，而且要求电极材料成本低廉、资源丰富和绿色环保。基于碳负极材料的优点，将废弃的一次性竹筷，在碱性溶液中经过可控的热处理，利用竹子中丰富的天然纤维素，从而获得尺寸均匀的碳纤维(CFs)材料。相比于石墨电极，竹基CFs作为LIBs的负极材料时表现出优异的电化学性能。为进一步提高其储锂性能，以CFs为骨架，通过水热法在其表面制备了一层二硫化钼(MoS₂)纳米花，形成核壳结构的CFs/MoS₂复合电极材料。电化学测试结果表明，CFs电极在200 mA/g的电流密度下循环500次，放电比容量仍有381.1 mA·h/g；CFs/MoS₂复合材料在1000 mA/g的大电流密度下经过1000次循环，仍保持有843 mA·h/g的放电比容量。 

Bamboo-based carbon fibers/MoS2 composite as an anode material for lithium ion batteries

With the rapid development of electronic products, electric vehicles and smart grids, lithium-ion batteries (LIBs) are required to not only possess superior lithium storage performance, but also be low-cost, abundant resources, and foremost sustainable. Based on the advantages of carbon anode materials, a smart strategy to convert the used bamboo chopsticks into uniform carbon fibers (CFs) by using the abundant natural fibers in chopsticks after a simple hydrothermal treatment was proposed. Compared with graphite electrodes, bamboo-based CFs exhibits excellent electrochemical performance as a sustainable anode of LIBs. Moreover, the lithium storage performance of CFs can be further upgraded by integrating nanostructured molybdenum disulfide (MoS₂) onto their surface by hydrothermal method to form the CFs/MoS₂ composite with a core-shell structure. The electro-chemical results show that the CFs electrode cycled 500 times at a current density of 200 mA/g, has a specific discharge capacity of 381.1 mA·h/g. And the CFs/MoS₂ composite electrode still maintains a specific discharge capacity of 843 mA·h/g at a high current density of 1000 mA/g for 1000 cycles.