3D intra-stacked CoO/carbon nanocomposites welded by Ag nanoparticles for high-capacity, reversible lithium storage

Changju Chae, Ki Woong Kim, Sue Jin Kim, Daehee Lee, Yejin Jo, Young Jun Yun, Jooho Moon, Youngmin Choi, Sun Sook Lee, Sungho Choi, Sunho Jeong

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

A wet-chemical, facile strategy is proposed for forming three-dimensional intra-structured nanocomposites to facilitate the development of high performance anodes for lithium ion batteries. The nanocomposites are composed of cobalt oxide nanoparticles, reduced graphene oxides, and Ag nanoparticles, and all the constituent materials are incorporated homogenously in a layer-by-layer structured geometry by a simple sono-chemical hybridizing process in a single, one-pot batch. Herein, it is revealed that the homogenously intra-stacked oxide, carbon, and metallic phases play critical roles in determining electrochemical performance (i.e. high capacity, rate capability, and cycling stability) of nanocomposite-based anodes, owing to the characteristic chemical/physical nature of constituent materials welded by partial melting of the metallic nanoparticles. In particular, by virtue of a characteristic role of a nano-Ag phase in suppressing the irreversible capacity, a critical drawback for metal oxide-based anodes, excellent capacities are demonstrated (983 and 770 mA h g-1 at current densities of 100 and 2000 mA g-1, respectively).

Original languageEnglish
Pages (from-to)10368-10376
Number of pages9
JournalNanoscale
Volume7
Issue number23
DOIs
Publication statusPublished - 2015 Jun 21

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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