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Cycle Life Evaluati...
Cycle Life Evaluation of 3 Ah LixMn2O4-based Lithium-Ion Secondary Cells for Low-Earth-Orbit Satellites : II. Harvested Electrode Examination
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- Brown, Shelley (author)
- KTH,Kemiteknik
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- Ogawa, Keita (author)
- Adv Engn Serv Co Ltd, Tsukuba
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- Kumeuchi, Youichi (author)
- NEC Tokin Corp, Kanagawa
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- Enomoto, Shinsuke (author)
- NEC Tokin Corp, Kanagawa
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- Uno, Masatoshi (author)
- Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Kanagawa
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- Saito, Hirobumi (author)
- Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Kanagawa
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- Sone, Yoshitsugu (author)
- Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Kanagawa
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- Abraham, Daniel (author)
- Argonne Natl Lab, Div Chem Engn
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- Lindbergh, Göran (author)
- KTH,Kemiteknik
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(creator_code:org_t)
- Amsterdam : ELSEVIER, 2008
- 2008
- English.
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In: Journal of Power Sources. - Amsterdam : ELSEVIER. - 0378-7753 .- 1873-2755. ; 185:2, s. 1454-1464
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Lithium-ion batteries area candidate for the energy storage system onboard low-earth-orbit satellites. Terrestrial experiments are able to capture the performance degradation of cells in orbit, therefore providing the opportunity for lifetime investigations. The lifetime performance of 3 Ah commercial LixMn2O4-based pouch cells was evaluated in a matrix of different cycling depths-of-discharge (DODs: 0, 20,40%) and temperatures (25, 45 degrees C). Aged cells were disassembled and the electrochemical performance of harvested electrodes investigated with two- and three-electrode pouch cells. The positive electrode had a larger decrease in capacity than the negative electrode. Both the positive and negative electrode contributed to the increase of cell impedance measured at high states-of-charge (SOCs). The data at low SOCs indicated that the increase of cell impedance was associated with the positive electrode, which showed a significant increase in the magnitude of the high-frequency semi-circle. This SOC-dependence was observed for cells cycled for either extended periods of time or at higher temperatures with a 40% DOD swing. Low-current cycling of positive electrodes revealed a change in the second potential plateau, possibly reflecting a structural change of the LixMn2O4. This could impact on the electrode kinetics and provide a possible explanation for the SOC-dependent change of the impedance.
Subject headings
- NATURVETENSKAP -- Kemi -- Oorganisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Inorganic Chemistry (hsv//eng)
Keyword
- Lithium-ion; LEO satellite; Ageing; Porous electrode; Impedance; Three-electrode measurement
- Electrochemistry
- Elektrokemi
Publication and Content Type
- ref (subject category)
- art (subject category)
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