Magnesium-based additives for the cathode slurry to enable high voltage application of lithium-ion batteries
The kinetic stabilization of the cathode/electrolyte interface is essential to enhance cycle life and safety of lithium-ion batteries at high voltage application. The addition of only 2 wt.% Mg powder to the cathode slurry were found to significantly increase the cycle life of LiNi1/3Co1/3Mn1/3O2/Li...
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| Veröffentlicht in: | Electrochimica acta 2017-02, Vol.228, p.9-17 |
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| container_title | Electrochimica acta |
| container_volume | 228 |
| creator | Wagner, Ralf Kraft, Vadim Streipert, Benjamin Kasnatscheew, Johannes Gallus, Dennis R. Amereller, Marius Korth, Martin Cekic-Laskovic, Isidora Winter, Martin |
| description | The kinetic stabilization of the cathode/electrolyte interface is essential to enhance cycle life and safety of lithium-ion batteries at high voltage application. The addition of only 2 wt.% Mg powder to the cathode slurry were found to significantly increase the cycle life of LiNi1/3Co1/3Mn1/3O2/Li half cells upon cycling to 4.6 V vs. Li/Li+, in terms of higher capacity retention, less parasitic reactions and less self-discharge. The presence of dissolved Mg2+ cations in the electrolyte during formation of the cell lead to an increased hydrolysis of the conducting salt LiPF6 and the formation of stable and effective LiPFxOy/Mg(PFxOy)2 species on the charged cathode surface. |
| doi_str_mv | 10.1016/j.electacta.2017.01.029 |
| format | Article |
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| issn | 0013-4686 1873-3859 |
| language | eng |
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| source | Elsevier ScienceDirect Journals Complete |
| subjects | Additives Batteries cathode slurry Electric potential Electrolytes Electrolytic cells high voltage Hydrolysis Kinetics Lithium Lithium-ion batteries Magnesium NMC cathode Rechargeable batteries Slurries |
| title | Magnesium-based additives for the cathode slurry to enable high voltage application of lithium-ion batteries |
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