Electrochemical Mechanism and Effect of Carbon Nanotubes on the Electrochemical Performance of Fe1.19(PO4)(OH)0.57(H2O)0.43 Cathode Material for Li-Ion Batteries
A hydrothermal synthesis route was used to synthesize iron(III) phosphate hydroxide hydrate-carbon nanotube composites. Carbon nanotubes (CNT) were mixed in solution with Fe-1.19(PO4)(OH)(0.57)(H2O)(0.43) (FPHH) precursors for one-pot hydrothermal reaction leading to the FPHH/CNT composite. This produces a highly electronic conductive material to be used as a cathode material for Li-ion battery. The galvanostatic cycling analysis shows that the material delivers a specific capacity of 160 mAh g(-1) at 0.2 C (0.2 Li per fu in 1 h), slightly decreasing with increasing current density. A high charge-discharge cyclability is observed, showing that a capacity of 120 mAh g(-1) at 1 C is maintained after 500 cycles. This may be attributed to the microspherical morphology of the particles and electronic percolation due to CNT but also to the unusual insertion mechanism resulting from the peculiar structure of FPHH formed by chains of partially occupied FeO6 octahedra connected by PO4 tetrahedra. The mechanism of the first discharge-charge cycle was investigated by combining operando X-ray diffraction and Fe-57 Mossbauer spectroscopy. FPHH undergoes a monophasic reaction with up to 10% volume changes based on the Fe3+/Fe2+ redox process. However, the variations of the FPHH lattice parameters and the Fe-57 quadrupole splitting distributions during the Li insertion-deinsertion process show a two-step behavior. We propose that such mechanism could be due to the existence of different types of vacant sites in FPHH, including vacant "octahedral" sites (Fe vacancies) that improve diffusion of Li by connecting the one-dimensional channels.
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State Univ New Jersey, Energy Storage Res Grp, Dept Mat Sci & Engn, Brunswick, NJ 08902 USAState Univ New Jersey, Energy Storage Res Grp, Dept Mat Sci & Engn, Brunswick, NJ 08902 USA
Amatucci, Glenn G.
Pereira, Nathalie
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State Univ New Jersey, Energy Storage Res Grp, Dept Mat Sci & Engn, Brunswick, NJ 08902 USAState Univ New Jersey, Energy Storage Res Grp, Dept Mat Sci & Engn, Brunswick, NJ 08902 USA
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Univ Montpellier, CNRS, Inst Charles Gerhardt, UMR 5253, F-34095 Montpellier 5, France
Univ Cadi Ayyad, Lab Chim Mat & Environm, Marrakech, MoroccoUniv Montpellier, CNRS, Inst Charles Gerhardt, UMR 5253, F-34095 Montpellier 5, France
Difi, Siham
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Saadoune, Ismael
Sougrati, Moulay Tahar
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Univ Montpellier, CNRS, Inst Charles Gerhardt, UMR 5253, F-34095 Montpellier 5, France
CNRS, FR 3459, Reseau Stockage Electrochim Energie RS2E, F-80039 Amiens, FranceUniv Montpellier, CNRS, Inst Charles Gerhardt, UMR 5253, F-34095 Montpellier 5, France
Sougrati, Moulay Tahar
Hakkou, Rachid
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Univ Cadi Ayyad, Lab Chim Mat & Environm, Marrakech, MoroccoUniv Montpellier, CNRS, Inst Charles Gerhardt, UMR 5253, F-34095 Montpellier 5, France
Hakkou, Rachid
Edstrom, Kristina
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Uppsala Univ, Dept Chem, Angstrom Lab, SE-75121 Uppsala, SwedenUniv Montpellier, CNRS, Inst Charles Gerhardt, UMR 5253, F-34095 Montpellier 5, France
Edstrom, Kristina
Lippens, Pierre-Emmanuel
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Univ Montpellier, CNRS, Inst Charles Gerhardt, UMR 5253, F-34095 Montpellier 5, France
CNRS, FR 3459, Reseau Stockage Electrochim Energie RS2E, F-80039 Amiens, FranceUniv Montpellier, CNRS, Inst Charles Gerhardt, UMR 5253, F-34095 Montpellier 5, France
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Univ Montpellier, Inst Charles Gerhardt, UMR CNRS 5253, Pl Eugene Bataillon, F-34095 Montpellier 5, FranceUniv Montpellier, Inst Charles Gerhardt, UMR CNRS 5253, Pl Eugene Bataillon, F-34095 Montpellier 5, France
El Khalifi, Mohammed
Lippens, Pierre-Emmanuel
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Univ Montpellier, Inst Charles Gerhardt, UMR CNRS 5253, Pl Eugene Bataillon, F-34095 Montpellier 5, France
CNRS FR3459, RS2E, 33 Rue St Leu, F-80039 Amiens, FranceUniv Montpellier, Inst Charles Gerhardt, UMR CNRS 5253, Pl Eugene Bataillon, F-34095 Montpellier 5, France
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State Univ New Jersey, Energy Storage Res Grp, Dept Mat Sci & Engn, Brunswick, NJ 08902 USAState Univ New Jersey, Energy Storage Res Grp, Dept Mat Sci & Engn, Brunswick, NJ 08902 USA
Amatucci, Glenn G.
Pereira, Nathalie
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State Univ New Jersey, Energy Storage Res Grp, Dept Mat Sci & Engn, Brunswick, NJ 08902 USAState Univ New Jersey, Energy Storage Res Grp, Dept Mat Sci & Engn, Brunswick, NJ 08902 USA
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Univ Montpellier, CNRS, Inst Charles Gerhardt, UMR 5253, F-34095 Montpellier 5, France
Univ Cadi Ayyad, Lab Chim Mat & Environm, Marrakech, MoroccoUniv Montpellier, CNRS, Inst Charles Gerhardt, UMR 5253, F-34095 Montpellier 5, France
Difi, Siham
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Saadoune, Ismael
Sougrati, Moulay Tahar
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Univ Montpellier, CNRS, Inst Charles Gerhardt, UMR 5253, F-34095 Montpellier 5, France
CNRS, FR 3459, Reseau Stockage Electrochim Energie RS2E, F-80039 Amiens, FranceUniv Montpellier, CNRS, Inst Charles Gerhardt, UMR 5253, F-34095 Montpellier 5, France
Sougrati, Moulay Tahar
Hakkou, Rachid
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h-index: 0
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Univ Cadi Ayyad, Lab Chim Mat & Environm, Marrakech, MoroccoUniv Montpellier, CNRS, Inst Charles Gerhardt, UMR 5253, F-34095 Montpellier 5, France
Hakkou, Rachid
Edstrom, Kristina
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h-index: 0
机构:
Uppsala Univ, Dept Chem, Angstrom Lab, SE-75121 Uppsala, SwedenUniv Montpellier, CNRS, Inst Charles Gerhardt, UMR 5253, F-34095 Montpellier 5, France
Edstrom, Kristina
Lippens, Pierre-Emmanuel
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h-index: 0
机构:
Univ Montpellier, CNRS, Inst Charles Gerhardt, UMR 5253, F-34095 Montpellier 5, France
CNRS, FR 3459, Reseau Stockage Electrochim Energie RS2E, F-80039 Amiens, FranceUniv Montpellier, CNRS, Inst Charles Gerhardt, UMR 5253, F-34095 Montpellier 5, France
机构:
Univ Montpellier, Inst Charles Gerhardt, UMR CNRS 5253, Pl Eugene Bataillon, F-34095 Montpellier 5, FranceUniv Montpellier, Inst Charles Gerhardt, UMR CNRS 5253, Pl Eugene Bataillon, F-34095 Montpellier 5, France
El Khalifi, Mohammed
Lippens, Pierre-Emmanuel
论文数: 0引用数: 0
h-index: 0
机构:
Univ Montpellier, Inst Charles Gerhardt, UMR CNRS 5253, Pl Eugene Bataillon, F-34095 Montpellier 5, France
CNRS FR3459, RS2E, 33 Rue St Leu, F-80039 Amiens, FranceUniv Montpellier, Inst Charles Gerhardt, UMR CNRS 5253, Pl Eugene Bataillon, F-34095 Montpellier 5, France