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Title: Enhanced lithium storage capability of FeF3·0.33H2O single crystal with active insertion site exposed

Journal Article · · Nano Energy
 [1];  [2]; ORCiD logo [1]; ORCiD logo [3];  [1];  [1];  [3]; ORCiD logo [3];  [4];  [1];  [5];  [5];  [3]
  1. Beijing Inst. of Technology (China). Beijing Key Lab. of Environmental Science and Engineering. School of Materials Science and Engineering
  2. Beijing Jiaotong Univ. (China). National Active Distribution Network Technology Research Center
  3. Argonne National Lab. (ANL), Argonne, IL (United States). Chemical Sciences and Engineering Division
  4. Nanchang Inst. of Technology (China). School of Science
  5. Beijing Inst. of Technology (China). Beijing Key Lab. of Environmental Science and Engineering. School of Materials Science and Engineering; Collaborative Innovation Center of Electric Vehicles in Beijing (China)

Iron fluoride cathode for lithium batteries intrigues researchers for decades due to high capacity and low cost, but suffers from poor electronic and ionic conductivity. Hierarchical micro/nano construction with preferred orientation growth can shorten ion diffusion pathway and facilitate electron transportation without inducing side reactions. FeF3·0.33H2O hierarchical microspheres self-assembled by octagonal single crystal slices are prepared. Benefiting from the artful structure, SAED and XRD characterizations confirm that the octagonal single crystal slices provides more lithium ions intercalation positions (4c sites). Electrochemical tests demonstrate that the well designed FeF3·0.33H2O single crystal (FFH-S) delivers 30 mAh g-1 higher capacity (172 mAh g-1 at 0.1C) than the common FeF3·0.33H2O polycrystal (FFH-P). In-situ XRD combined with theoretic calculation elucidate the difference in lithium storage capacity. Instructive argument that single crystal octagon slices with [110] oriented growth provide more active sites for lithium ions intercalation contributes to the preparation of high performance iron fluoride cathode materials for rechargeable battery.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States); Beijing Institute of Technology (China)
Sponsoring Organization:
USDOE; National Basic Research Program of China
Grant/Contract Number:
AC02-06CH11357; 2015CB251100
OSTI ID:
1506677
Journal Information:
Nano Energy, Vol. 56; ISSN 2211-2855
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 36 works
Citation information provided by
Web of Science

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Cited By (1)

3D Honeycomb Architecture Enables a High‐Rate and Long‐Life Iron (III) Fluoride–Lithium Battery journal September 2019