With its high theoretical capacity and low electrochemical potential, Li metal itself would be the ideal anode for Li-ion batteries. However, practical use of the Li anode has been hindered by its tendency for dendritic growth, which leads to unstable solid electrolyte interphase, volume fluctuation during cycling, and even shorting of the battery. This problem can be solved by employing a conducting, lightweight, and lithiophilic scaffold that can stabilize high loading of Li during cycling and avoid its dendritic filament growth. Here we report that crumpled paper ball-like graphene particles can readily assemble to yield a scaffold with scalable Li loading up to 10 mA hr cm⁻² within tolerable volume fluctuation. High Coulombic efficiency of 97.5% over 750 cycles (1,500 hr) was achieved. Plating/stripping Li up to 12 mA hr cm⁻² on crumpled graphene scaffold does not experience dendrite growth.

凭借其高理论容量和低电化学势，锂金属本身将成为锂离子电池的理想阳极。然而，锂阳极的实际使用由于其树枝状生长的趋势而受到阻碍，这导致不稳定的固体电解质中间相，循环期间的体积波动，甚至电池短路。该问题可以通过使用导电的，轻质的和亲硫性的支架来解决，该支架可以在循环过程中稳定Li的高负载并避免其树枝状长丝的生长。在这里，我们报道了皱巴巴的纸状石墨烯颗粒可以很容易地组装，以产生具有可扩展的Li负载的支架，该负载可扩展至10 mA hr cm ^-2。在可容忍的体积波动范围内。在750个循环（1,500小时）内，库伦效率高达97.5％。在折皱的石墨烯支架上电镀/剥离Li至12 mA hr cm ^-2不会出现枝晶生长。