• 文献标题:   N-Doped Carbon-Wrapped Cobalt-Manganese Oxide Nanosheets Loaded into a Three-Dimensional Graphene Nanonetwork as a Free-Standing Anode for Lithium-Ion Storage
  • 文献类型:   Article
  • 作  者:   ZHANG PL, WANG WW, LIU JZ, ZHOU CC, ZHOU JJ, XU L, CHEN LY
  • 作者关键词:   chemical vapor deposition, threedimensional graphene nanonetwork, freestanding anode for lib, ndoped carbon, cobaltmanganese oxide nanosheet
  • 出版物名称:   ACS APPLIED NANO MATERIALS
  • ISSN:  
  • 通讯作者地址:  
  • 被引频次:   6
  • DOI:   10.1021/acsanm.1c00143 EA APR 2021
  • 出版年:   2021

▎ 摘  要

A high-quality and centimeter-level three-dimensional (3D) nitrogen-doped graphene (NG) nanonetwork is synthesized via a chemical vapor deposition method to serve as a substrate and a current collector, which directly germinates active metal oxides to act as a free-standing electrode in lithium-ion batteries. By means of facile electrodeposition and annealing processes, the tetragonal spinel cobalt-manganese oxide nanosheets wrapped with polypyrrole pyrolytic carbon are in situ hybridized with a 3D NG nanonetwork. In particular, the introduced carbon protective layer can enhance the Li-ion storage capacity and cycle stability of the composite electrode. The metallic synergistic effect and rational carbonaceous hybridization jointly provide high-performance charge storage and cycle stability. Notably, the surface-controlled capacitive effect stands out contributing to the total charge storage more than ever in nanostructure electrodes.