| Electrochemical Energy Storage Performance of Li2FeP2O7 Thin Film Electrodes for Lithium-ion Thin film batteries |
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A. Rambabu1, K Vasu2, S B Krupanidhi3, K C James Raju4 |
1Department of Physics, GMR Institute of Technology, Rajam, Andhra Pradesh, India, 532127
2Department of Physics, School of Advanced Sciences, Vellore Institute of Technology, Vellore, Tamil Nadu, India, 632014
3Materials Research Centre, Indian Institute of Science, Bangalore, Karnataka, 560012
4School of Physics, University of Hyderabad, Hyderabad, Telangana, India, 500046 |
Correspondence:
A. Rambabu,
Email: rambabu.a@gmrit.edu.in
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Received: 15 December 2025 • Accepted: 4 February 2026 |
| Abstract |
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Thin film of Li2FeP2O7 of thickness ~200 nm has been prepared using pulsed laser deposition (PLD) technique. Target for PLD was synthesized using solid-state method (ball milling) to prepare bulk polycrystalline Li2FeP2O7 compound. Grazing incident X-ray diffraction (GIXRD) was used to see the phase-purity and crystallinity of Li2FeP2O7 thin films. Thin film of Li2FeP2O7 cathode was made and the electrochemical activity of Li2FeP2O7 thin film delineates a highly efficient Li+ intercalation as well as stable cycling behaviour at different current rates. Li2FeP2O7 deposited over stainless steel (SS) current collectors delivered capacity of 92 mA g-1 (corresponding areal capacity: 37 mAh cm-2) at 5 μA g-1 rate with 100 % Coulombic efficiency till 300 cycles. The primary aim of the current study is to aware the scientific community about the possibility of pyrophosphate based polyanionic materials for all solid state Li-ion thin film batteries. |
| Keywords:
Li2FeP2O7, Thin films, Energy Storage, LIBs |
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