Stabilized alpha-MnO{sub 2} electrodes for rechargeable 3 V lithium batteries
- Argonne National Lab., IL (United States)
- Michigan Technological Univ., Houghton, MI (United States). Dept. of Metallurgical and Materials Engineering
Manganese dioxide electrodes that have x-ray diffraction patterns characteristic of {alpha}-MnO{sub 2} (hollandite-type structure) and ramsdellite-MnO{sub 2} have been evaluated in rechargeable 3 V lithium cells. Electrochemical data indicate that these electrodes (162 mAh/g, 10th cycle) provide superior performance to both single-phase pure {alpha}-MnO{sub 2} (136 mAh/g, 10th cycle) and ramsdellite-MnO{sub 2} electrodes (113 mAh/g, 10th cycle), and comparable performance to lithia-stabilized {alpha}-MnO{sub 2} (0.15 Li{sub 2}O {center_dot} MnO{sub 2}) electrodes (153 mAh/g, 10th cycle). Transmission electron microscopy images and convergent-beam electron diffraction patterns show that the MnO{sub 2} samples consist of grains of {alpha}-MnO{sub 2} grains of ramsdellite-MnO{sub 2}, and grains of interconnected {alpha}-MnO{sub 2} and ramsdellite-MnO{sub 2} which exhibit a mutual crystallographic orientation. A search is underway to find other interconnected MnO{sub 2} materials with even better cycling performance.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL
- Sponsoring Organization:
- United States Advanced Battery Consortium (United States); Hydro-Quebec, Montreal, PQ (Canada); USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 533105
- Journal Information:
- Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 7 Vol. 144; ISSN 0013-4651; ISSN JESOAN
- Country of Publication:
- United States
- Language:
- English
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