Graphite paper (GP) with low density,high electrical conductivity and thermal diffusivity is obtained from graphite oxide.When used as current collectors for anodes in Li-ion batteries (LIBs),GP exhibited better cycle stability compared to copper foils.Anode materials such as commercial graphite,RGO/MoS2 hybrids has been directly cast onto GP by standard doctor-blade method and the electrochemical performance is almost the same as Cu current collectors.The areal weight of the collector can be reduced to below 1 mg · cm-2 by using GP instead of Cu foils,thus reducing the usage of non-active materials in LIBs and improving the performance of the LIBs.%利用氧化石墨可得到具有低密度、高导电性、高热扩散率的石墨纸.本研究发现,利用这样的石墨纸代替商用金属铜箔作为锂离子电池负极集流体,可体现出更好的循环稳定性.商用石墨负极、还原氧化石墨烯(RGO)/MoS2复合负极材料均可通过标准的电极刮涂法和石墨纸直接兼容,得到的极片表现出和在铜集流体上相当的电化学性能.石墨纸集流体可将集流体在负极中的面重量由商用铜箔的8.9 mg·cm-2降低至1 mg·cm-2以下,大幅度降低了非活性材料在电池中的用量,可望进一步提高电池的综合性能.
展开▼
