Amorphous iron phosphate: potential host for various charge carrier ions
- Title
- Amorphous iron phosphate: potential host for various charge carrier ions
- Author
- 선양국
- Keywords
- SODIUM-ION; ELECTROCHEMICAL-BEHAVIOR; ELECTRODE MATERIALS; LITHIUM BATTERIES; CARBON NANOTUBES; CATHODE MATERIAL; LI-ION; FEPO4; NANOPARTICLES; DIFFUSION
- Issue Date
- 2014-10
- Publisher
- NATURE PUBLISHING GROUP, 75 VARICK ST, 9TH FLR, NEW YORK, NY 10013-1917 USA
- Citation
- NPG ASIA MATERIALS, 6권, 논문번호 e149
- Abstract
- In response to the ever-increasing global demand for viable energy-storage systems, sodium and potassium batteries appear to be promising alternatives to lithium ion batteries because of the abundance, low cost and environmental benignity of sodium/potassium. Electrical energy storage via ion-intercalation reactions in crystalline electrodes is critically dependent on the sizes of the guest ions. Herein, we report on the use of a porous amorphous iron phosphate synthesized using ambient temperature strategies as a potential host that stores electrical energy through the feasible insertion of mono-/di-/tri-valent ions. A combination of ex situ studies reveals the existence of a reversible amorphous-to-crystalline transition in this versatile electrode during electrochemical reactions with monovalent sodium, potassium and lithium. This reconstitutive reaction contributes to realizing specific capacities of 179 and 156 mAhg(-1) versus sodium and potassium at current densities of 10 and 5 mAg(-1), respectively. This finding facilitates the feasible development of several amorphous electrodes with similar phase behavior for energy-storage applications.
- URI
- http://dx.doi.org/10.1038/am.2014.98http://hdl.handle.net/20.500.11754/50438
- ISBN
- 1884-4057
- ISSN
- 1884-4049
- DOI
- 10.1038/am.2014.98
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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