Department of Chemical Engineering, New Mexico State University, Las Cruces, New Mexico 88003, United States.
ACS Appl Mater Interfaces. 2013 Jun 12;5(11):5330-5. doi: 10.1021/am401239f. Epub 2013 May 22.
A new nanocomposite formulation of the FeS-based anode for lithium-ion batteries is proposed, where FeS nanoparticles wrapped in reduced graphene oxide (RGO) are produced via a facile direct-precipitation approach. The resulting nanocomposite FeS@RGO structure has better lithium ion storage properties, exceeding those of FeS prepared without RGO sheets. The enhanced electrochemical performance is attributed to the robust sheet-wrapped structure with smaller FeS nanoparticles and synergetic effects between FeS and RGO sheets, such as increased conductivity, shortened lithium ion diffusion path, and the effective prevention of polysulfide dissolution.
提出了一种用于锂离子电池的基于 FeS 的新型纳米复合正极材料，其中通过简便的直接沉淀法制备了被还原氧化石墨烯（RGO）包裹的 FeS 纳米颗粒。所得的纳米复合 FeS@RGO 结构具有更好的锂离子存储性能，超过了没有 RGO 片制备的 FeS。增强的电化学性能归因于具有较小 FeS 纳米颗粒的坚固的片层包裹结构以及 FeS 和 RGO 片之间的协同效应，例如增加的电导率、缩短的锂离子扩散路径以及有效防止多硫化物溶解。
