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Title: Freestanding three-dimensional core–shell nanoarrays for lithium-ion battery anodes

Here, structural degradation and low conductivity of transition-metal oxides lead to severe capacity fading in lithium-ion batteries. Recent efforts to solve this issue have mainly focused on using nanocomposites or hybrids by integrating nanosized metal oxides with conducting additives. Here we design specific hierarchical structures and demonstrate their use in flexible, large-area anode assemblies. Fabrication of these anodes is achieved via oxidative growth of copper oxide nanowires onto copper substrates followed by radio-frequency sputtering of carbon-nitride films, forming freestanding three-dimensional arrays with core–shell nano-architecture. Cable-like copper oxide/carbon-nitride core–shell nanostructures accommodate the volume change during lithiation-delithiation processes, the three-dimensional arrays provide abundant electroactive zones and electron/ion transport paths, and the monolithic sandwich-type configuration without additional binders or conductive agents improves energy/power densities of the whole electrode.
Authors:
 [1] ;  [2] ;  [3] ;  [2] ;  [4] ;  [2] ;  [4] ;  [4] ;  [4] ;  [5] ;  [6] ;  [6]
  1. Beijing Institute of Technology, Beijing (China); Argonne National Lab. (ANL), Lemont, IL (United States)
  2. Beijing Institute of Technology, Beijing (China); Collaborative Innovation Center of Electric Vehicles in Beijing, Beijing (China)
  3. Argonne National Lab. (ANL), Lemont, IL (United States); Univ. of Illinois at Chicago, Chicago, IL (United States)
  4. Beijing Institute of Technology, Beijing (China)
  5. Univ. of Illinois at Chicago, Chicago, IL (United States)
  6. Argonne National Lab. (ANL), Lemont, IL (United States)
Publication Date:
Grant/Contract Number:
AC02-06CH11357
Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 7; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V); National Basic Research Program of China; National Natural Science Foundation of China (NNSFC)
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; anode; carbon nitride; copper oxide; core-shell; lithium ion battery
OSTI Identifier:
1341004