Deng Weina, Chen Xiaohua, Hu Aiping, Zhang Shiying
Hunan Key Laboratory of Applied Environmental Photocatalysis, Changsha University Changsha 410022 China
College of Materials Science and Engineering, Hunan University Changsha 410082 China
RSC Adv. 2018 Aug 9;8(50):28440-28446. doi: 10.1039/c8ra03352h. eCollection 2018 Aug 7.
In this work, a three-dimensional nitrogen doped aligned carbon nanotube array (NACNTs)@NiO@graphitic carbon composite was fabricated by an effective strategy involving nebulized ethanol assisted infiltration, In this structure, the NiO nanoparticles were wrapped by graphitic carbon layers and NiO@graphitic carbon core-shell nanoparticles adhered strictly to the surface of NACNTs to form a highly ordered 3D structure. When this composite was used as an anode for lithium ion batteries, the well-ordered pore of its NACNTs can facilitate the electrolyte to penetrate and improve electronic conductivity. At the same time, the graphitic layers can promote the stability of a solid electrolyte interface film. Therefore, the NACNTs@NiO@graphitic carbon composite containing 68.1 wt% NiO delivers excellent capacity retention of 91.6% after 200 cycles at 0.2C.
在本工作中，通过一种涉及雾化乙醇辅助浸润的有效策略制备了三维氮掺杂取向碳纳米管阵列（NACNTs）@NiO@石墨碳复合材料。在这种结构中，NiO纳米颗粒被石墨碳层包裹，且NiO@石墨碳核壳纳米颗粒严格附着在NACNTs表面，形成高度有序的三维结构。当这种复合材料用作锂离子电池的阳极时，其NACNTs排列有序的孔隙可促进电解质渗透并提高电子导电性。同时，石墨层可促进固体电解质界面膜的稳定性。因此，含有68.1 wt% NiO的NACNTs@NiO@石墨碳复合材料在0.2C下循环200次后具有91.6%的优异容量保持率。
