中文摘要：

一条帮助锂的途径为太古的石墨的脱落被开发了，它允许很少层 graphene nanosheets 的大规模准备。这个过程包含意外物理插入和脱落，和这个方法准备的 graphene nanosheets 揭示没受到干扰的 sp < 啜 class= “ a-plus-plus ” > 2 -hybridized 结构。可能的二拍子的圆舞机制，包含在石墨层和一个随后的 lithiation 过程的边附近被套住的否定费用，被建议在石墨夹层内解释锂的插入。如果必要，现在的脱落能被重复并且更薄(单身者或 23 层) graphene 能在大规模上被完成。这个简单过程为太古的石墨的脱落提供一个有效过程，它可能支持 graphene 的未来应用程序。

英文摘要：

A lithium-assisted approach has been developed for the exfoliation of pristine graphite, which allows the large-scale preparation of few-layer graphene nanosheets. The process involves an unexpected physical insertion and exfoliafion, and the graphene nanosheets prepared by this method reveal undisturbed sp2-hybridized structures. A possible two-step mechanism, which involves the negative charge being trapped around the edges of the graphite layers and a subsequent lithiation process, is proposed to explain the insertion of lithium inside the graphite interlayers. If necessary, the present exfoliation can be repeated and thinner （single or 2-3 layer） graphene can be achieved on a large scale. This simple process provides an efficient process for the exfoliation of pristine graphite, which might promote the future applications of graphene.