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Title: Pyrolytic Carbon Nanosheets for Ultrafast and Ultrastable Sodium‐Ion Storage

Journal Article · · Small
 [1];  [2];  [3];  [1];  [1];  [4];  [2];  [5];  [1];  [6]
  1. Department of Polymer Science and Engineering Inha University Incheon 402‐751 South Korea
  2. Department of Materials Science and Engineering University of Illinois at Urbana − Champaign Urbana IL 61801 USA
  3. Institute of Advanced Composite Materials Korea Institute of Science and Technology (KIST) 92 Chudong‐ro, Bongdong‐eup Wanju‐gun Jeonbuk 55324 South Korea
  4. Division of Electron Microscopic Research Korea Basic Science Institute Daejeon 34133 South Korea
  5. Carbon Composite Materials Research Center Korea Institute of Science and Technology 92 Chudong‐ro, Bongdong‐eup Wanju‐gun Jeonbuk 55324 South Korea
  6. Department of Chemical Engineering Kangwon National University Samcheok 245‐711 South Korea

Abstract Na‐ion cointercalation in the graphite host structure in a glyme‐based electrolyte represents a new possibility for using carbon‐based materials (CMs) as anodes for Na‐ion storage. However, local microstructures and nanoscale morphological features in CMs affect their electrochemical performances; they require intensive studies to achieve high levels of Na‐ion storage performances. Here, pyrolytic carbon nanosheets (PCNs) composed of multitudinous graphitic nanocrystals are prepared from renewable bioresources by heating. In particular, PCN‐2800 prepared by heating at 2800 °C has a distinctive sp 2 carbon bonding nature, crystalline domain size of ≈44.2 Å, and high electrical conductivity of ≈320 S cm −1 , presenting significantly high rate capability at 600 C (60 A g −1 ) and stable cycling behaviors over 40 000 cycles as an anode for Na‐ion storage. The results of this study show the unusual graphitization behaviors of a char‐type carbon precursor and exceptionally high rate and cycling performances of the resulting graphitic material, PCN‐2800, even surpassing those of supercapacitors.

Sponsoring Organization:
USDOE
Grant/Contract Number:
DE‐AC02‐06CH11357
OSTI ID:
1431138
Journal Information:
Small, Journal Name: Small Vol. 14 Journal Issue: 17; ISSN 1613-6810
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English
Citation Metrics:
Cited by: 21 works
Citation information provided by
Web of Science

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